Reference manual

This is the reference manual for the ProseMirror rich text editor. It lists and describes the full public API exported by the library.

For more introductory material, please see the guides.

ProseMirror is structured as a number of separate modules. This reference manual describes the exported API per module. We'll usually use the abbreviated module name here, but on NPM they are prefixed with prosemirror-. So if you want to use something from the state module, you have to import it like this:

var EditorState = require("prosemirror-state").EditorState
var state = EditorState.create({schema: mySchema})

Or in ES6 syntax:

import {EditorState} from "prosemirror-state"
let state = EditorState.create({schema: mySchema})

module state

This module implements the state object of a ProseMirror editor, along with the representation of the selection and the plugin abstraction.

Editor State

ProseMirror keeps all editor state (the things, basically, that would be required to create an editor just like the current one) in a single object. That object is updated (creating a new state) by applying transactions to it.

class EditorState

The state of a ProseMirror editor is represented by an object of this type. This is a persistent data structure—it isn't updated, but rather a new state value is computed from an old one with the apply method.

In addition to the built-in state fields, plugins can define additional pieces of state.

doc: Node

The current document.

selection: Selection

The selection.

storedMarks: ?[Mark]

A set of marks to apply to the next character that's typed. Will be null whenever no explicit marks have been set.

schema: Schema

The schema of the state's document.

plugins: [Plugin]

The plugins that are active in this state.

apply(tr: Transaction) → EditorState

Apply the given transaction to produce a new state.

applyTransaction(tr: Transaction) → {state: EditorState, transactions: [Transaction]}

Verbose variant of apply that returns the precise transactions that were applied (which might be influenced by the transaction hooks of plugins) along with the new state.

tr: Transaction

Start a transaction from this state.

reconfigure(config: Object) → EditorState

Create a new state based on this one, but with an adjusted set of active plugins. State fields that exist in both sets of plugins are kept unchanged. Those that no longer exist are dropped, and those that are new are initialized using their init method, passing in the new configuration object..

toJSON(pluginFields: ?Object<Plugin>) → Object

Serialize this state to JSON. If you want to serialize the state of plugins, pass an object mapping property names to use in the resulting JSON object to plugin objects.

static create(config: Object) → EditorState

Create a state. config must be an object containing at least a schema (the schema to use) or doc (the starting document) property. When it has a selection property, that should be a valid selection in the given document, to use as starting selection. Plugins, which are specified as an array in the plugins property, may read additional fields from the config object.

static fromJSON(config: Object, json: Object, pluginFields: ?Object<Plugin>) → EditorState

Deserialize a JSON representation of a state. config should have at least a schema field, and should contain array of plugins to initialize the state with. pluginFields can be used to deserialize the state of plugins, by associating plugin instances with the property names they use in the JSON object.

class Transaction extends Transform

An editor state transaction, which can be applied to a state to create an updated state. Use EditorState.tr to create an instance.

Transactions track changes to the document (they are a subclass of Transform), but also other state changes, like selection updates and adjustments of the set of stored marks. In addition, you can store metadata properties in a transaction, which are extra pieces of informations that client code or plugins can use to describe what a transacion represents, so that they can update their own state accordingly.

The editor view uses a single metadata property: it will attach a property "pointer" with the value true to selection transactions directly caused by mouse or touch input.

time: number

The timestamp associated with this transaction.

storedMarks: ?[Mark]

The stored marks in this transaction.

docChanged: bool

True when this transaction changes the document.

selection: Selection

The transform's current selection. This defaults to the editor selection mapped through the steps in this transform, but can be overwritten with setSelection.

setSelection(selection: Selection) → Transaction

Update the transaction's current selection. This will determine the selection that the editor gets when the transaction is applied.

selectionSet: bool

Whether the selection was explicitly updated by this transaction.

setStoredMarks(marks: ?[Mark]) → Transaction

Replace the set of stored marks.

storedMarksSet: bool

Whether the stored marks were explicitly set for this transaction.

setTime(time: number) → Transaction

Update the timestamp for the transaction.

replaceSelection(slice: Slice) → Transaction

replaceSelectionWith(node: Node, inheritMarks: ?bool) → Transaction

Replace the selection with the given node or slice, or delete it if content is null. When inheritMarks is true and the content is inline, it inherits the marks from the place where it is inserted.

deleteSelection() → Transaction

Delete the selection.

insertText(text: string, from: ?number, to: ?number = from) → Transaction

Replace the given range, or the selection if no range is given, with a text node containing the given string.

setMeta(key: string | Plugin | PluginKey, value: any) → Transaction

Store a metadata property in this transaction, keyed either by name or by plugin.

getMeta(key: string | Plugin | PluginKey) → any

Retrieve a metadata property for a given name or plugin.

isGeneric: bool

Returns true if this transaction doesn't contain any metadata, and can thus be safely extended.

scrollIntoView() → Transaction

Indicate that the editor should scroll the selection into view when updated to the state produced by this transaction.

addStoredMark(mark: Mark) → Transaction

Add a mark to the set of stored marks.

removeStoredMark(mark: Mark | MarkType) → Transaction

Remove a mark or mark type from the set of stored marks.

Selection

A ProseMirror selection can be either a classical text selection (of which cursors are a special case), or a node selection, where a specific document node is selected.

class Selection

Superclass for editor selections.

from: number

The lower bound of the selection.

to: number

The upper bound of the selection.

$from: ResolvedPos

The resolved lower bound of the selection

$to: ResolvedPos

The resolved upper bound of the selection

empty: bool

True if the selection is an empty text selection (head an anchor are the same).

eq(other: Selection) → bool

Test whether the selection is the same as another selection.

map(doc: Node, mapping: Mappable) → Selection

Map this selection through a mappable thing. doc should be the new document, to which we are mapping.

toJSON() → Object

Convert the selection to a JSON representation.

static findFrom($pos: ResolvedPos, dir: number, textOnly: ?bool) → ?Selection

Find a valid cursor or leaf node selection starting at the given position and searching back if dir is negative, and forward if negative. When textOnly is true, only consider cursor selections.

static near($pos: ResolvedPos, bias: ?number = 1, ?bool) → Selection

Find a valid cursor or leaf node selection near the given position. Searches forward first by default, but if bias is negative, it will search backwards first.

static atStart(doc: Node, textOnly: ?bool) → ?Selection

Find the cursor or leaf node selection closest to the start of the given document. When textOnly is true, only consider cursor selections.

static atEnd(doc: Node, textOnly: ?bool) → ?Selection

Find the cursor or leaf node selection closest to the end of the given document. When textOnly is true, only consider cursor selections.

static between($anchor: ResolvedPos, $head: ResolvedPos, bias: ?number) → Selection

Find a selection that spans the given positions, if both are text positions. If not, return some other selection nearby, where bias determines whether the method searches forward (default) or backwards (negative number) first.

static fromJSON(doc: Node, json: Object) → Selection

Deserialize a JSON representation of a selection.

class TextSelection extends Selection

A text selection represents a classical editor selection, with a head (the moving side) and anchor (immobile side), both of which point into textblock nodes. It can be empty (a regular cursor position).

new TextSelection($anchor: ResolvedPos, $head: ?ResolvedPos = $anchor)

Construct a text selection.

anchor: number

The selection's immobile side (does not move when pressing shift-arrow).

head: number

The selection's mobile side (the side that moves when pressing shift-arrow).

$anchor: ResolvedPos

The resolved anchor of the selection.

$head: ResolvedPos

The resolved head of the selection.

static create(doc: Node, anchor: number, head: ?number = anchor) → TextSelection

Create a text selection from non-resolved positions.

class NodeSelection extends Selection

A node selection is a selection that points at a single node. All nodes marked selectable can be the target of a node selection. In such an object, from and to point directly before and after the selected node.

new NodeSelection($from: ResolvedPos)

Create a node selection. Does not verify the validity of its argument.

node: Node

The selected node.

static create(doc: Node, from: number, ?number) → TextSelection

Create a node selection from non-resolved positions.

static isSelectable(node: Node) → bool

Determines whether the given node may be selected as a node selection.

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Plugin System

To make distributing and using extra editor functionality easier, ProseMirror has a plugin system.

class Plugin

Plugins wrap extra functionality that can be added to an editor. They can define new state fields, and add view props.

new Plugin(options: Object)

Create a plugin.

options: Object

props: ?EditorProps

The view props added by this plugin. Note that the dispatchTransaction and state props can't be defined by plugins, only by the main props object. Props that are functions will be bound to have the plugin instance as their this binding.

state: ?StateField

A state field defined by this plugin.

key: ?PluginKey

Can optionally be used to make this a keyed plugin. You can have only one plugin with a given key in a given state, but it is possible to access the plugin's configuration and state through the key, without having access to the plugin instance itself.

view(EditorView) → Object

When the plugin needs to interact with the editor view, or set something up in the DOM, use this field. The function will be called when the plugin's state is associated with an editor view.

returns: Object

Should return an object with the following optional properties:

update(EditorView)

Called whenever the view's state is updated.

destroy()

Called when the view is destroyed or receives a state with different plugins.

filterTransaction(Transaction, EditorState) → bool

When present, this will be called before a transaction is applied by the state, allowing the plugin to cancel it (by returning false).

appendTransaction(transactions: [Transaction], oldState: EditorState, newState: EditorState) → ?Transaction

Allows the plugin to append another transaction to be applied after the given array of transactions. When another plugin appends a transaction after this was called, it is called again with the new state and extended array of transactions.

props: EditorProps

The props exported by this plugin.

options: Object

The plugin's configuration object.

getState(state: EditorState) → any

Get the state field for this plugin.

interface StateField

A plugin may provide a state field (under its state property) of this type, which describes the state it wants to keep. Functions provided here are always called with the plugin instance as their this binding.

init(config: Object, instance: EditorState) → T

Initialize the value of this field. config will be the object passed to EditorState.create. Note that instance is a half-initialized state instance, and will not have values for any fields initialzed after this one.

apply(tr: Transaction, value: T, oldState: EditorState, newState: EditorState) → T

Apply the given transaction to this state field, producing a new field value. Note that the newState argument is a partially constructed state does not yet contain the state from plugins coming after this plugin.

toJSON(value: T) → any

Convert this field to JSON. Optional, can be left off to disable JSON serialization for the field.

fromJSON(config: Object, value: any, state: EditorState) → T

Deserialize the JSON representation of this field. Note that the state argument is again a half-initialized state.

class PluginKey

A key is used to tag plugins in a way that makes it possible to find them, given an editor state. Assigning a key does mean only one plugin of that type can be active in a state.

new PluginKey(name: ?string = "key")

Create a plugin key.

get(state: EditorState) → ?Plugin

Get the active plugin with this key, if any, from an editor state.

getState(state: EditorState) → ?any

Get the plugin's state from an editor state.

module view

ProseMirror's view displays a given editor state in the DOM, and handles user events.

Make sure you load style/prosemirror.css as a stylesheet if you want to instantiate a ProseMirror editor.

class EditorView

An editor view manages the DOM structure that represents an editor. Its state and behavior are determined by its props.

new EditorView(place: ?dom.Node | fn(dom.Node), props: EditorProps)

Create a view. place may be a DOM node that the editor should be appended to, or a function that will place it into the document. If it is null, the editor will not be added to the document.

props: EditorProps

The view's current props.

state: EditorState

The view's current state.

content: dom.Element

The editable DOM node containing the document. (You probably should not be directly interfering with its child nodes.)

update(props: EditorProps)

Update the view's props. Will immediately cause an update to the view's DOM.

updateState(state: EditorState)

Update the editor's state prop, without touching any of the other props.

hasFocus() → bool

Query whether the view has focus.

someProp(propName: string, f: fn(prop: any) → any) → any

Goes over the values of a prop, first those provided directly, then those from plugins (in order), and calls f every time a non-undefined value is found. When f returns a truthy value, that is immediately returned. When f isn't provided, it is treated as the identity function (the prop value is returned directly).

focus()

Focus the editor.

root: dom.Document | dom.DocumentFragment

Get the document root in which the editor exists. This will usually be the top-level document, but might be a shadow DOM root if the editor is inside a shadow DOM.

posAtCoords(coords: {left: number, top: number}) → ?{pos: number, inside: number}

Given a pair of coordinates, return the document position that corresponds to them. May return null if the given coordinates aren't inside of the visible editor. When an object is returned, its pos property is the position nearest to the coordinates, and its inside property holds the position before the inner node that the click happened inside of, or -1 if the click was at the top level.

coordsAtPos(pos: number) → {left: number, right: number, top: number, bottom: number}

Returns the screen rectangle at a given document position. left and right will be the same number, as this returns a flat cursor-ish rectangle.

endOfTextblock(dir: "up" | "down" | "left" | "right" | "forward" | "backward", state: ?EditorState) → bool

Find out whether the selection is at the end of a textblock when moving in a given direction. When, for example, given "left", it will return true if moving left from the current cursor position would leave that position's parent textblock. For horizontal motion, it will always return false if the selection isn't a cursor selection.

destroy()

Removes the editor from the DOM and destroys all node views.

dispatch(tr: Transaction)

Dispatch a transaction. Will call the dispatchTransaction when given, and defaults to applying the transaction to the current state and calling updateState otherwise. This method is bound to the view instance, so that it can be easily passed around.

interface EditorProps

The configuration object that can be passed to an editor view. It supports the following properties (only state is required).

The various event-handling functions may all return true to indicate that they handled the given event. The view will then take care to call preventDefault on the event, except with handleDOMEvents, where the handler itself is responsible for that.

Except for state and dispatchTransaction, these may also be present on the props property of plugins. How a prop is resolved depends on the prop. Handler functions are called one at a time, starting with the plugins (in order of appearance), and finally looking at the base props, until one of them returns true. For some props, the first plugin that yields a value gets precedence. For class, all the classes returned are combined.

state: EditorState

The state of the editor.

dispatchTransaction(tr: Transaction)

The callback over which to send transactions (state updates) produced by the view. You'll usually want to make sure this ends up calling the view's updateState method with a new state that has the transaction applied.

handleDOMEvents: ?Object<fn(view: EditorView, event: dom.Event) → bool>

Can be an object mapping DOM event type names to functions that handle them. Such functions will be called before any handling ProseMirror does of events fired on the editable DOM element. Contrary to the other event handling props, when returning true from such a function, you are responsible for calling preventDefault yourself (or not, if you want to allow the default behavior).

handleKeyDown(view: EditorView, event: dom.KeyboardEvent) → bool

Called when the editor receives a keydown event.

handleKeyPress(view: EditorView, event: dom.KeyboardEvent) → bool

Handler for keypress events.

handleTextInput(view: EditorView, from: number, to: number, text: string) → bool

Whenever the user directly input text, this handler is called before the input is applied. If it returns true, the default effect of actually inserting the text is suppressed.

handleClickOn(view: EditorView, pos: number, node: Node, nodePos: number, event: dom.MouseEvent, direct: bool) → bool

Called for each node around a click, from the inside out. The direct flag will be true for the inner node.

handleClick(view: EditorView, pos: number, event: dom.MouseEvent) → bool

Called when the editor is clicked, after handleClickOn handlers have been called.

handleDoubleClickOn(view: EditorView, pos: number, node: Node, nodePos: number, event: dom.MouseEvent, direct: bool) → bool

Called for each node around a double click.

handleDoubleClick(view: EditorView, pos: number, event: dom.MouseEvent) → bool

Called when the editor is double-clicked, after handleDoubleClickOn.

handleTripleClickOn(view: EditorView, pos: number, node: Node, nodePos: number, event: dom.MouseEvent, direct: bool) → bool

Called for each node around a triple click.

handleTripleClick(view: EditorView, pos: number, event: dom.MouseEvent) → bool

Called when the editor is triple-clicked, after handleTripleClickOn.

handleContextMenu(view: EditorView, pos: number, event: dom.MouseEvent) → bool

Called when a context menu event is fired in the editor.

onFocus(view: EditorView, event: dom.Event)

Called when the editor is focused.

onBlur(view: EditorView, event: dom.Event)

Called when the editor loses focus.

domParser: ?DOMParser

The parser to use when reading editor changes from the DOM. Defaults to calling DOMParser.fromSchema on the editor's schema.

clipboardParser: ?DOMParser

The parser to use when reading content from the clipboard. When not given, the value of the domParser prop is used.

transformPasted(Slice) → Slice

Can be used to transform pasted content before it is applied to the document.

transformPastedHTML(string) → string

Can be used to transform pasted HTML text, before it is parsed, for example to clean it up.

transformPastedText(string) → string

Transform pasted plain text.

nodeViews: ?Object<fn(node: Node, view: EditorView, getPos: fn() → number, decorations: [Decoration]) → NodeView>

Allows you to pass custom rendering and behavior logic for nodes and marks. Should map node and mark names to constructor function that produce a NodeView object implementing the node's display behavior. getPos is a function that can be called to get the node's current position, which can be useful when creating transactions that update it.

decorations is an array of node or inline decorations that are active around the node. They are automatically drawn in the normal way, and you will usually just want to ignore this, but they can also be used as a way to provide context information to the node view without adding it to the document itself.

clipboardSerializer: ?DOMSerializer

The DOM serializer to use when putting content onto the clipboard. If not given, the result of DOMSerializer.fromSchema will be used.

decorations(EditorState) → ?DecorationSet

A set of document decorations to add to the view.

editable(EditorState) → bool

When this returns false, the content of the view is not directly editable.

attributes: ?Object<string> | fn(EditorState) → ?Object<string>

Control the DOM attributes of the editable element. May be either an object or a function going from an editor state to an object. By default, the element will get a class "ProseMirror", and will have its contentEditable attribute determined by the editable prop. Additional classes provided here will be added to the class. For other attributes, the value provided first (as in someProp) will be used.

scrollThreshold: ?number

Determines the distance (in pixels) between the cursor and the end of the visible viewport at which point, when scrolling the cursor into view, scrolling takes place. Defaults to 0.

scrollMargin: ?number

Determines the extra space (in pixels) that is left above or below the cursor when it is scrolled into view. Defaults to 5.

interface NodeView

By default, document nodes are rendered using the result of the toDOM method of their spec, and managed entirely by the editor. For some use cases, such as embedded node-specific editing interfaces, when you need more control over the behavior of a node's in-editor representation, and can define a custom node view.

dom: ?dom.Node

The outer DOM node that represents the document node. When not given, the default strategy is used to create a DOM node.

contentDOM: ?dom.Node

The DOM node that should hold the node's content. Only meaningful if the node view also defines a dom property and if its node type is not a leaf node type. When this is present, ProseMirror will take care of rendering the node's children into it. When it is not present, the node view itself is responsible for rendering (or deciding not to render) its child nodes.

update(node: Node, decorations: [Decoration]) → bool

When given, this will be called when the view is updating itself. It will be given a node (possibly of a different type), and an array of active decorations (which are automatically drawn, and the node view may ignore if it isn't interested in them), and should return true if it was able to update to that node, and false otherwise. If the node view has a contentDOM property (or no dom property), updating its child nodes will be handled by ProseMirror.

selectNode()

Can be used to override the way the node's selected status (as a node selection) is displayed.

deselectNode()

When defining a selectNode method, you should also provide a deselectNode method to disable it again.

setSelection(anchor: number, head: number, root: dom.Document)

This will be called to handle setting the selection inside the node. By default, a DOM selection will be created between the DOM positions corresponding to the given anchor and head positions, but if you override it you can do something else.

stopEvent(event: dom.Event) → bool

Can be used to prevent the editor view from trying to handle some or all DOM events that bubble up from the node view.

ignoreMutation(dom.MutationRecord) → bool

Called when a DOM mutation happens within the view. Return false if the editor should re-parse the range around the mutation, true if it can safely be ignored.

destroy()

Called when the node view is removed from the editor or the whole editor is detached.

class Decoration

Decorations can be provided to the view (through the decorations prop) to adjust the way the document is drawn. They come in several variants. See the static members of this class for details.

options: Object

The options provided when creating this decoration. Can be useful if you've stored extra information in that object.

static widget(pos: number, dom: dom.Node, options: ?Object) → Decoration

Creates a widget decoration, which is a DOM node that's shown in the document at the given position.

options: ?Object

These options are supported:

associative: ?string

By default, widgets are right-associative, meaning they end up to the right of content inserted at their position. You can set this to "left" to make it left-associative, so that the inserted content will end up after the widget.

stopEvent(event: dom.Event) → bool

Can be used to control which DOM events, when they bubble out of this widget, the editor view should ignore.

key: ?string

When comparing decorations of this type (in order to decide whether it needs to be redrawn), ProseMirror will by default compare the widget DOM node by identity. If you pass a key, that key will be compared instead, which can be useful when you generate decorations on the fly and don't want to store and reuse DOM nodes.

static inline(from: number, to: number, attrs: DecorationAttrs, options: ?Object) → Decoration

Creates an inline decoration, which adds the given attributes to each inline node between from and to.

options: ?Object

These options are recognized:

inclusiveLeft: ?bool

Determines how the left side of the decoration is mapped when content is inserted directly at that positon. By default, the decoration won't include the new content, but you can set this to true to make it inclusive.

inclusiveRight: ?bool

Determines how the right side of the decoration is mapped. See inclusiveLeft.

static node(from: number, to: number, attrs: DecorationAttrs, options: ?Object) → Decoration

Creates a node decoration. from and to should point precisely before and after a node in the document. That node, and only that node, will receive the given attributes.

interface DecorationAttrs

A set of attributes to add to a decorated node. Most properties simply directly correspond to DOM attributes of the same name, which will be set to the property's value. These are exceptions:

class: ?string

A CSS class name or a space-separated set of class names to be added to the classes that the node already had.

style: ?string

A string of CSS to be added to the node's existing style property.

nodeName: ?string

When non-null, the target node is wrapped in a DOM element of this type (and the other attributes are applied to this element).

class DecorationSet

A collection of decorations, organized in such a way that the drawing algorithm can efficiently use and compare them. This is a persistent data structure—it is not modified, updates create a new value.

find(start: ?number, end: ?number) → [Decoration]

Find all decorations in this set which touch the given range (including decorations that start or end directly at the boundaries). When the arguments are omitted, all decorations in the set are collected.

map(mapping: Mapping, doc: Node, options: ?Object) → DecorationSet

Map the set of decorations in response to a change in the document.

options: ?Object

An optional set of options.

onRemove(decorationOptions: Object)

When given, this function will be called for each decoration that gets dropped as a result of the mapping, passing the options of that decoration.

add(doc: Node, decorations: [Decoration]) → DecorationSet

Add the given array of decorations to the ones in the set, producing a new set. Needs access to the current document to create the appropriate tree structure.

remove(decorations: [Decoration]) → DecorationSet

Create a new set that contains the decorations in this set, minus the ones in the given array.

static create(doc: Node, decorations: [Decoration]) → DecorationSet

Create a set of decorations, using the structure of the given document.

static empty: DecorationSet

The empty set of decorations.

module model

This module defines ProseMirror's content model, the data structures used to represent and manipulate documents.

Document Structure

A ProseMirror document is a tree. At each level, a node tags the type of content that's there, and holds a fragment containing its children.

class Node

This class represents a node in the tree that makes up a ProseMirror document. So a document is an instance of Node, with children that are also instances of Node.

Nodes are persistent data structures. Instead of changing them, you create new ones with the content you want. Old ones keep pointing at the old document shape. This is made cheaper by sharing structure between the old and new data as much as possible, which a tree shape like this (without back pointers) makes easy.

Never directly mutate the properties of a Node object. See this guide for more information.

type: NodeType

The type of node that this is.

attrs: Object

An object mapping attribute names to values. The kind of attributes allowed and required are determined by the node type.

content: Fragment

A container holding the node's children.

marks: [Mark]

The marks (things like whether it is emphasized or part of a link) associated with this node.

text: ?string

For text nodes, this contains the node's text content.

nodeSize: number

The size of this node, as defined by the integer-based indexing scheme. For text nodes, this is the amount of characters. For other leaf nodes, it is one. And for non-leaf nodes, it is the size of the content plus two (the start and end token).

childCount: number

The number of children that the node has.

child(index: number) → Node

Get the child node at the given index. Raises an error when the index is out of range.

maybeChild(index: number) → ?Node

Get the child node at the given index, if it exists.

forEach(f: fn(node: Node, offset: number, index: number))

Call f for every child node, passing the node, its offset into this parent node, and its index.

nodesBetween(from: ?number, to: ?number, f: fn(node: Node, pos: number, parent: Node, index: number))

Invoke a callback for all descendant nodes recursively between the given two positions that are relative to start of this node's content. The callback is invoked with the node, its parent-relative position, its parent node, and its child index. If the callback returns false, the current node's children will not be recursed over.

descendants(f: fn(node: Node, pos: number, parent: Node))

Call the given callback for every descendant node.

textContent: string

Concatenates all the text nodes found in this fragment and its children.

textBetween(from: number, to: number, blockSeparator: ?string, leafText: ?string) → string

Get all text between positions from and to. When blockSeparator is given, it will be inserted whenever a new block node is started. When leafText is given, it'll be inserted for every non-text leaf node encountered.

firstChild: ?Node

Returns this node's first child, or null if there are no children.

lastChild: ?Node

Returns this node's last child, or null if there are no children.

eq(other: Node) → bool

Test whether two nodes represent the same content.

sameMarkup(other: Node) → bool

Compare the markup (type, attributes, and marks) of this node to those of another. Returns true if both have the same markup.

hasMarkup(type: NodeType, attrs: ?Object, marks: ?[Mark]) → bool

Check whether this node's markup correspond to the given type, attributes, and marks.

copy(content: ?Fragment = null) → Node

Create a new node with the same markup as this node, containing the given content (or empty, if no content is given).

mark(marks: [Mark]) → Node

Create a copy of this node, with the given set of marks instead of the node's own marks.

cut(from: number, to: ?number) → Node

Create a copy of this node with only the content between the given offsets. If to is not given, it defaults to the end of the node.

slice(from: number, to: ?number = this.content.size) → Slice

Cut out the part of the document between the given positions, and return it as a Slice object.

replace(from: number, to: number, slice: Slice) → Node

Replace the part of the document between the given positions with the given slice. The slice must 'fit', meaning its open sides must be able to connect to the surrounding content, and its content nodes must be valid children for the node they are placed into. If any of this is violated, an error of type ReplaceError is thrown.

nodeAt(pos: number) → ?Node

Find the node after the given position.

childAfter(pos: number) → {node: ?Node, index: number, offset: number}

Find the (direct) child node after the given offset, if any, and return it along with its index and offset relative to this node.

childBefore(pos: number) → {node: ?Node, index: number, offset: number}

Find the (direct) child node before the given offset, if any, and return it along with its index and offset relative to this node.

resolve(pos: number) → ResolvedPos

Resolve the given position in the document, returning an object describing its path through the document.

rangeHasMark(from: ?number, to: ?number, type: MarkType) → bool

Test whether a mark of the given type occurs in this document between the two given positions.

isBlock: bool

True when this is a block (non-inline node)

isTextblock: bool

True when this is a textblock node, a block node with inline content.

isInline: bool

True when this is an inline node (a text node or a node that can appear among text).

isText: bool

True when this is a text node.

isLeaf: bool

True when this is a leaf node.

toString() → string

Return a string representation of this node for debugging purposes.

contentMatchAt(index: number) → ContentMatch

Get the content match in this node at the given index.

canReplace(from: number, to: number, replacement: ?Fragment, start: ?number, end: ?number) → bool

Test whether replacing the range from to to (by index) with the given replacement fragment (which defaults to the empty fragment) would leave the node's content valid. You can optionally pass start and end indices into the replacement fragment.

canReplaceWith(from: number, to: number, type: NodeType, attrs: ?[Mark]) → bool

Test whether replacing the range from to to (by index) with a node of the given type with the given attributes and marks would be valid.

canAppend(other: Node) → bool

Test whether the given node's content could be appended to this node. If that node is empty, this will only return true if there is at least one node type that can appear in both nodes (to avoid merging completely incompatible nodes).

toJSON() → Object

Return a JSON-serializeable representation of this node.

static fromJSON(schema: Schema, json: Object) → Node

Deserialize a node from its JSON representation.

class Fragment

Fragment is the type used to represent a node's collection of child nodes.

Fragments are persistent data structures. That means you should not mutate them or their content, but create new instances whenever needed. The API tries to make this easy.

append(other: Fragment) → Fragment

Create a new fragment containing the content of this fragment and other.

cut(from: number, to: ?number) → Fragment

Cut out the sub-fragment between the two given positions.

replaceChild(index: number, node: Node) → Fragment

Create a new fragment in which the node at the given index is replaced by the given node.

eq(other: Fragment) → bool

Compare this fragment to another one.

firstChild: ?Node

The first child of the fragment, or null if it is empty.

lastChild: ?Node

The last child of the fragment, or null if it is empty.

childCount: number

The number of child nodes in this fragment.

child(index: number) → Node

Get the child node at the given index. Raise an error when the index is out of range.

offsetAt(index: number) → number

Get the offset at (size of children before) the given index.

maybeChild(index: number) → ?Node

Get the child node at the given index, if it exists.

forEach(f: fn(node: Node, offset: number, index: number))

Call f for every child node, passing the node, its offset into this parent node, and its index.

findDiffStart(other: Fragment) → ?number

Find the first position at which this fragment and another fragment differ, or null if they are the same.

findDiffEnd(other: Node) → ?{a: number, b: number}

Find the first position, searching from the end, at which this fragment and the given fragment differ, or null if they are the same. Since this position will not be the same in both nodes, an object with two separate positions is returned.

toString() → string

Return a debugging string that describes this fragment.

toJSON() → ?Object

Create a JSON-serializeable representation of this fragment.

static fromJSON(schema: Schema, value: ?Object) → Fragment

Deserialize a fragment from its JSON representation.

static fromArray(array: [Node]) → Fragment

Build a fragment from an array of nodes. Ensures that adjacent text nodes with the same style are joined together.

static from(nodes: ?Fragment | Node | [Node]) → Fragment

Create a fragment from something that can be interpreted as a set of nodes. For null, it returns the empty fragment. For a fragment, the fragment itself. For a node or array of nodes, a fragment containing those nodes.

static empty: Fragment

An empty fragment. Intended to be reused whenever a node doesn't contain anything (rather than allocating a new empty fragment for each leaf node).

class Mark

A mark is a piece of information that can be attached to a node, such as it being emphasized, in code font, or a link. It has a type and optionally a set of attributes that provide further information (such as the target of the link). Marks are created through a Schema, which controls which types exist and which attributes they have.

type: MarkType

The type of this mark.

attrs: Object

The attributes associated with this mark.

addToSet(set: [Mark]) → [Mark]

Given a set of marks, create a new set which contains this one as well, in the right position. If this mark is already in the set, the set itself is returned. If a mark of this type with different attributes is already in the set, a set in which it is replaced by this one is returned.

removeFromSet(set: [Mark]) → [Mark]

Remove this mark from the given set, returning a new set. If this mark is not in the set, the set itself is returned.

isInSet(set: [Mark]) → bool

Test whether this mark is in the given set of marks.

eq(other: Mark) → bool

Test whether this mark has the same type and attributes as another mark.

toJSON() → Object

Convert this mark to a JSON-serializeable representation.

static fromJSON(schema: Schema, json: Object) → Mark

static sameSet(a: [Mark], b: [Mark]) → bool

Test whether two sets of marks are identical.

static setFrom(marks: ?Mark | [Mark]) → [Mark]

Create a properly sorted mark set from null, a single mark, or an unsorted array of marks.

static none: [Mark]

The empty set of marks.

class Slice

A slice represents a piece cut out of a larger document. It stores not only a fragment, but also the depth up to which nodes on both side are 'open' / cut through.

new Slice(content: Fragment, openLeft: number, openRight: number)

content: Fragment

The slice's content nodes.

openLeft: number

The open depth at the start.

openRight: number

The open depth at the end.

size: number

The size this slice would add when inserted into a document.

toJSON() → ?Object

Convert a slice to a JSON-serializable representation.

static fromJSON(schema: Schema, json: ?Object) → Slice

Deserialize a slice from its JSON representation.

static maxOpen(fragment: Fragment) → Slice

Create a slice from a fragment by taking the maximum possible open value on both side of the fragment.

static empty: Slice

The empty slice.

class ReplaceError extends Error

Error type raised by Node.replace when given an invalid replacement.

Resolved Positions

Positions in a document can be represented as integer offsets. But you'll often want to use a more convenient representation.

class ResolvedPos

You'll often have to 'resolve' a position to get the context you need. Objects of this class represent such a resolved position, providing various pieces of context information and helper methods.

Throughout this interface, methods that take an optional depth parameter will interpret undefined as this.depth and negative numbers as this.depth + value.

pos: number

The position that was resolved.

depth: number

The number of levels the parent node is from the root. If this position points directly into the root, it is 0. If it points into a top-level paragraph, 1, and so on.

parentOffset: number

The offset this position has into its parent node.

parent: Node

The parent node that the position points into. Note that even if a position points into a text node, that node is not considered the parent—text nodes are 'flat' in this model.

node(depth: ?number) → Node

The ancestor node at the given level. p.node(p.depth) is the same as p.parent.

index(depth: ?number) → number

The index into the ancestor at the given level. If this points at the 3rd node in the 2nd paragraph on the top level, for example, p.index(0) is 2 and p.index(1) is 3.

indexAfter(depth: ?number) → number

The index pointing after this position into the ancestor at the given level.

start(depth: ?number) → number

The (absolute) position at the start of the node at the given level.

end(depth: ?number) → number

The (absolute) position at the end of the node at the given level.

before(depth: ?number) → number

The (absolute) position directly before the node at the given level, or, when level is this.level + 1, the original position.

after(depth: ?number) → number

The (absolute) position directly after the node at the given level, or, when level is this.level + 1, the original position.

textOffset: number

When this position points into a text node, this returns the distance between the position and the start of the text node. Will be zero for positions that point between nodes.

nodeAfter: ?Node

Get the node directly after the position, if any. If the position points into a text node, only the part of that node after the position is returned.

nodeBefore: ?Node

Get the node directly before the position, if any. If the position points into a text node, only the part of that node before the position is returned.

marks(after: ?bool) → [Mark]

Get the marks at this position, factoring in the surrounding marks' inclusiveRight property. If the position is at the start of a non-empty node, or after is true, the marks of the node after it (if any) are returned.

sharedDepth(pos: number) → number

The depth up to which this position and the given (non-resolved) position share the same parent nodes.

blockRange(other: ?ResolvedPos = this, pred: ?fn(Node) → bool) → ?NodeRange

Returns a range based on the place where this position and the given position diverge around block content. If both point into the same textblock, for example, a range around that textblock will be returned. If they point into different blocks, the range around those blocks or their ancestors in their common ancestor is returned. You can pass in an optional predicate that will be called with a parent node to see if a range into that parent is acceptable.

sameParent(other: ResolvedPos) → bool

Query whether the given position shares the same parent node.

class NodeRange

Represents a flat range of content.

$from: ResolvedPos

A resolved position along the start of the content. May have a depth greater than this object's depth property, since these are the positions that were used to compute the range, not re-resolved positions directly at its boundaries.

$to: ResolvedPos

A position along the end of the content. See caveat for $from.

depth: number

The depth of the node that this range points into.

start: number

The position at the start of the range.

end: number

The position at the end of the range.

parent: Node

The parent node that the range points into.

startIndex: number

The start index of the range in the parent node.

endIndex: number

The end index of the range in the parent node.

Document Schema

The schema to which a document must conform is another data structure. It describes the nodes and marks that may appear in a document, and the places at which they may appear.

class Schema

A document schema.

new Schema(spec: SchemaSpec)

Construct a schema from a specification.

nodeSpec: OrderedMap<NodeSpec>

The node specs that the schema is based on.

markSpec: OrderedMap<MarkSpec>

The mark spec that the schema is based on.

nodes: Object<NodeType>

An object mapping the schema's node names to node type objects.

marks: Object<MarkType>

A map from mark names to mark type objects.

cached: Object

An object for storing whatever values modules may want to compute and cache per schema. (If you want to store something in it, try to use property names unlikely to clash.)

node(type: string | NodeType, attrs: ?Object, content: ?Fragment | Node | [Node], marks: ?[Mark]) → Node

Create a node in this schema. The type may be a string or a NodeType instance. Attributes will be extended with defaults, content may be a Fragment, null, a Node, or an array of nodes.

text(text: string, marks: ?[Mark]) → Node

Create a text node in the schema. Empty text nodes are not allowed.

mark(type: string | MarkType, attrs: ?Object) → Mark

Create a mark with the given type and attributes.

nodeFromJSON(json: Object) → Node

Deserialize a node from its JSON representation. This method is bound.

markFromJSON(json: Object) → Mark

Deserialize a mark from its JSON representation. This method is bound.

interface SchemaSpec

An object describing a schema, as passed to the Schema constructor.

nodes: Object<NodeSpec> | OrderedMap<NodeSpec>

The node types in this schema. Maps names to NodeSpec objects describing the node to be associated with that name. Their order is significant

marks: ?Object<MarkSpec> | OrderedMap<MarkSpec>

The mark types that exist in this schema.

interface NodeSpec

content: ?string

The content expression for this node, as described in the schema guide. When not given, the node does not allow any content.

group: ?string

The group or space-separated groups to which this node belongs, as referred to in the content expressions for the schema.

inline: ?bool

Should be set to a truthy value for inline nodes. (Implied for text nodes.)

attrs: ?Object<AttributeSpec>

The attributes that nodes of this type get.

selectable: ?bool

Controls whether nodes of this type can be selected (as a node selection). Defaults to true for non-text nodes.

draggable: ?bool

Determines whether nodes of this type can be dragged. Enabling it causes ProseMirror to set a draggable attribute on its DOM representation, and to put its HTML serialization into the drag event's data transfer when dragged. Defaults to false.

code: ?bool

Can be used to indicate that this node contains code, which causes some commands to behave differently.

defining: ?bool

Determines whether this node is considered an important parent node during replace operations (such as paste). Non-defining (the default) nodes get dropped when their entire content is replaced, whereas defining nodes persist and wrap the inserted content. Likewise, the the inserted content, when not inserting into a textblock, the defining parents of the content are preserved. Typically, non-default-paragraph textblock types, and possible list items, are marked as defining.

toDOM(Node) → DOMOutputSpec

Defines the default way a node of this type should be serialized to DOM/HTML (as used by DOMSerializer.fromSchema. Should return an array structure that describes the resulting DOM structure, with an optional number zero (“hole”) in it to indicate where the node's content should be inserted.

parseDOM: ?[ParseRule]

Associates DOM parser information with this node, which can be used by DOMParser.fromSchema to automatically derive a parser. The node field in the rules is implied (the name of this node will be filled in automatically). If you supply your own parser, you do not need to also specify parsing rules in your schema.

interface MarkSpec

attrs: ?Object<AttributeSpec>

The attributes that marks of this type get.

inclusiveRight: ?bool

Whether this mark should be active when the cursor is positioned at the end of the mark. Defaults to true.

toDOM(mark: Mark) → DOMOutputSpec

Defines the default way marks of this type should be serialized to DOM/HTML.

parseDOM: ?[ParseRule]

Associates DOM parser information with this mark (see the corresponding node spec field. The mark field in the rules is implied.

interface AttributeSpec

Used to define attributes. Attributes that have no default or compute property must be provided whenever a node or mark of a type that has them is created.

The following fields are supported:

default: ?any

The default value for this attribute, to choose when no explicit value is provided.

compute() → any

A function that computes a default value for the attribute.

class NodeType

Node types are objects allocated once per Schema and used to tag Node instances with a type. They contain information about the node type, such as its name and what kind of node it represents.

name: string

The name the node type has in this schema.

schema: Schema

A link back to the Schema the node type belongs to.

spec: NodeSpec

The spec that this type is based on

isBlock: bool

True if this is a block type

isText: bool

True if this is the text node type.

isInline: bool

True if this is an inline type.

isTextblock: bool

True if this is a textblock type, a block that contains inline content.

isLeaf: bool

True for node types that allow no content.

create(attrs: ?Object, content: ?Fragment | Node | [Node], marks: ?[Mark]) → Node

Create a Node of this type. The given attributes are checked and defaulted (you can pass null to use the type's defaults entirely, if no required attributes exist). content may be a Fragment, a node, an array of nodes, or null. Similarly marks may be null to default to the empty set of marks.

createChecked(attrs: ?Object, content: ?Fragment | Node | [Node], marks: ?[Mark]) → Node

Like create, but check the given content against the node type's content restrictions, and throw an error if it doesn't match.

createAndFill(attrs: ?Object, content: ?Fragment | Node | [Node], marks: ?[Mark]) → ?Node

Like create, but see if it is necessary to add nodes to the start or end of the given fragment to make it fit the node. If no fitting wrapping can be found, return null. Note that, due to the fact that required nodes can always be created, this will always succeed if you pass null or Fragment.empty as content.

validContent(content: Fragment, attrs: ?Object) → bool

Returns true if the given fragment is valid content for this node type with the given attributes.

class MarkType

Like nodes, marks (which are associated with nodes to signify things like emphasis or being part of a link) are tagged with type objects, which are instantiated once per Schema.

name: string

The name of the mark type.

schema: Schema

The schema that this mark type instance is part of.

spec: MarkSpec

The spec on which the type is based.

create(attrs: ?Object) → Mark

Create a mark of this type. attrs may be null or an object containing only some of the mark's attributes. The others, if they have defaults, will be added.

removeFromSet(set: [Mark]) → [Mark]

When there is a mark of this type in the given set, a new set without it is returned. Otherwise, the input set is returned.

isInSet(set: [Mark]) → ?Mark

Tests whether there is a mark of this type in the given set.

class ContentMatch

Represents a partial match of a node type's content expression, and can be used to find out whether further content matches here, and whether a given position is a valid end of the parent node.

matchNode(node: Node) → ?ContentMatch

Match a node, returning a new match after the node if successful.

matchType(type: NodeType, attrs: ?Object, marks: ?[Mark] = Mark.none) → ?ContentMatch

Match a node type and marks, returning an match after that node if successful.

matchFragment(fragment: Fragment, from: ?number = 0, to: ?number = fragment.childCount) → ?ContentMatch | bool

Try to match a fragment. Returns a new match when successful, null when it ran into a required element it couldn't fit, and false if it reached the end of the expression without matching all nodes.

matchToEnd(fragment: Fragment, start: ?number, end: ?number) → bool

Returns true only if the fragment matches here, and reaches all the way to the end of the content expression.

validEnd() → bool

Returns true if this position represents a valid end of the expression (no required content follows after it).

fillBefore(after: Fragment, toEnd: bool, startIndex: ?number) → ?Fragment

Try to match the given fragment, and if that fails, see if it can be made to match by inserting nodes in front of it. When successful, return a fragment of inserted nodes (which may be empty if nothing had to be inserted). When toEnd is true, only return a fragment if the resulting match goes to the end of the content expression.

allowsMark(markType: MarkType) → bool

Check whether a node with the given mark type is allowed after this position.

findWrapping(target: NodeType, targetAttrs: ?Object, targetMarks: ?[Mark]) → ?[{type: NodeType, attrs: Object}]

Find a set of wrapping node types that would allow a node of type target with attributes targetAttrs to appear at this position. The result may be empty (when it fits directly) and will be null when no such wrapping exists.

findWrappingFor(node: Node) → ?[{type: NodeType, attrs: Object}]

Call findWrapping with the properties of the given node.

DOM Representation

Because representing a document as a tree of DOM nodes is central to the way ProseMirror operates, DOM parsing and serializing is integrated with the model.

(But note that you do not need to have a DOM implementation loaded to load this module.)

class DOMParser

A DOM parser represents a strategy for parsing DOM content into a ProseMirror document conforming to a given schema. Its behavior is defined by an array of rules.

new DOMParser(schema: Schema, rules: [ParseRule])

Create a parser that targets the given schema, using the given parsing rules.

schema: Schema

rules: [ParseRule]

parse(dom: dom.Node, options: ?Object = {}) → Node

Parse a document from the content of a DOM node.

options: ?Object

Configuration options.

preserveWhitespace: ?bool

By default, whitespace is collapsed as per HTML's rules. Pass true here to prevent the parser from doing that.

findPositions: ?[{node: dom.Node, offset: number}]

When given, the parser will, beside parsing the content, record the document positions of the given DOM positions. It will do so by writing to the objects, adding a pos property that holds the document position. DOM positions that are not in the parsed content will not be written to.

from: ?number

The child node index to start parsing from.

to: ?number

The child node index to stop parsing at.

topNode: ?Node

By default, the content is parsed into a doc node. You can pass this option to use the type and attributes from a different node as the top container.

topStart: ?number

Can be used to influence the content match at the start of the topnode. When given, should be a valid index into topNode.

parseSlice(dom: dom.Node, options: ?Object = {}) → Slice

Parses the content of the given DOM node, like parse, and takes the same set of options. But unlike that method, which produces a whole node, this one returns a slice that is open at the sides, meaning that the schema constraints aren't applied to the start of nodes to the left of the input and the end of nodes at the end.

static schemaRules(schema: Schema) → [ParseRule]

Extract the parse rules listed in a schema's node specs.

static fromSchema(schema: Schema) → DOMParser

Construct a DOM parser using the parsing rules listed in a schema's node specs.

interface ParseRule

A value that describes how to parse a given DOM node or inline style as a ProseMirror node or mark.

tag: ?string

A CSS selector describing the kind of DOM elements to match. A single rule should have either a tag or a style property.

style: ?string

A CSS property name to match. When given, this rule matches inline styles that list that property.

node: ?string

The name of the node type to create when this rule matches. Only valid for rules with a tag property, not for style rules. Each rule should have one of a node, mark, or ignore property (except when it appears in a node or mark spec, in which case the node or mark property will be derived from its position).

mark: ?string

The name of the mark type to wrap the matched content in.

priority: ?number

Can be used to change the order in which the parse rules in a schema are tried. Those with higher priority come first. Rules without a priority are counted as having priority 50. This property is only meaningful in a schema—when directly constructing a parser, the order of the rule array is used.

ignore: ?bool

When true, ignore content that matches this rule.

skip: ?bool

When true, ignore the node that matches this rule, but do parse its content.

attrs: ?Object

Attributes for the node or mark created by this rule. When getAttrs is provided, it takes precedence.

getAttrs(dom.Node | string) → ?bool | Object

A function used to compute the attributes for the node or mark created by this rule. Can also be used to describe further conditions the DOM element or style must match. When it returns false, the rule won't match. When it returns null or undefined, that is interpreted as an empty/default set of attributes.

Called with a DOM Element for tag rules, and with a string (the style's value) for style rules.

contentElement: ?string

For tag rules that produce non-leaf nodes or marks, by default the content of the DOM element is parsed as content of the mark or node. If the child nodes are in a descendent node, this may be a CSS selector string that the parser must use to find the actual content element.

getContent(dom.Node) → Fragment

Can be used to override the content of a matched node. Will be called, and its result used, instead of parsing the node's child node.

preserveWhitespace: ?bool

Controls whether whitespace should be preserved when parsing the content inside the matched element.

class DOMSerializer

A DOM serializer knows how to convert ProseMirror nodes and marks of various types to DOM nodes.

new DOMSerializer(nodes: Object<fn(node: Node) → DOMOutputSpec>, marks: Object<fn(mark: Mark) → DOMOutputSpec>)

Create a serializer. nodes should map node names to functions that take a node and return a description of the corresponding DOM. marks does the same for mark names.

nodes: Object<fn(node: Node) → DOMOutputSpec>

marks: Object<fn(mark: Mark) → DOMOutputSpec>

serializeFragment(fragment: Fragment, options: ?Object = {}) → dom.DocumentFragment

Serialize the content of this fragment to a DOM fragment. When not in the browser, the document option, containing a DOM document, should be passed so that the serialize can create nodes.

serializeNode(node: Node, options: ?Object = {}) → dom.Node

Serialize this node to a DOM node. This can be useful when you need to serialize a part of a document, as opposed to the whole document. To serialize a whole document, use serializeFragment on its content.

static renderSpec(doc: dom.Document, structure: DOMOutputSpec) → {dom: dom.Node, contentDOM: ?dom.Node}

Render an output spec.

static fromSchema(schema: Schema) → DOMSerializer

Build a serializer using the toDOM properties in a schema's node and mark specs.

static nodesFromSchema(schema: Schema) → Object<fn(node: Node) → DOMOutputSpec>

Gather the serializers in a schema's node specs into an object. This can be useful as a base to build a custom serializer from.

static marksFromSchema(schema: Schema) → Object<fn(mark: Mark) → DOMOutputSpec>

Gather the serializers in a schema's mark specs into an object.

interface DOMOutputSpec

A description of a DOM structure. Can be either a string, which is interpreted as a text node, a DOM node, which is interpreted as itself, or an array.

An array describes a DOM element. The first element in the array should be a string, and is the name of the DOM element. If the second element is a non-Array, non-DOM node object, it is interpreted as an object providing the DOM element's attributes. Any elements after that (including the 2nd if it's not an attribute object) are interpreted as children of the DOM elements, and must either be valid DOMOutputSpec values, or the number zero.

The number zero (pronounced “hole”) is used to indicate the place where a ProseMirror node's content should be inserted.

module transform

This module defines a way to transform documents. You can read more about transformations in this guide.

Steps

Transforming happens in Steps, which are atomic, well-defined modifications to a document. Applying a step produces a new document.

Each step provides a change map that maps positions in the old document to position in the transformed document. Steps can be inverted to create a step that undoes their effect, and chained together in a convenience object called a Transform.

class Step

A step object wraps an atomic operation. It generally applies only to the document it was created for, since the positions associated with it will only make sense for that document.

New steps are defined by creating classes that extend Step, overriding the apply, invert, map, getMap and fromJSON methods, and registering your class with a unique JSON-serialization identifier using Step.jsonID.

apply(doc: Node) → StepResult

Applies this step to the given document, returning a result object that either indicates failure, if the step can not be applied to this document, or indicates success by containing a transformed document.

getMap() → StepMap

Get the step map that represents the changes made by this step.

invert(doc: Node) → Step

Create an inverted version of this step. Needs the document as it was before the step as argument.

map(mapping: Mappable) → ?Step

Map this step through a mappable thing, returning either a version of that step with its positions adjusted, or null if the step was entirely deleted by the mapping.

merge(other: Step) → ?Step

Try to merge this step with another one, to be applied directly after it. Returns the merged step when possible, null if the steps can't be merged.

toJSON() → Object

Create a JSON-serializeable representation of this step. By default, it'll create an object with the step's JSON id, and each of the steps's own properties, automatically calling toJSON on the property values that have such a method.

static fromJSON(schema: Schema, json: Object) → Step

Deserialize a step from its JSON representation. Will call through to the step class' own implementation of this method.

static jsonID(id: string, stepClass: constructor<Step>)

To be able to serialize steps to JSON, each step needs a string ID to attach to its JSON representation. Use this method to register an ID for your step classes. Try to pick something that's unlikely to clash with steps from other modules.

class StepResult

The result of applying a step. Contains either a new document or a failure value.

doc: ?Node

The transformed document.

failed: ?string

Text providing information about a failed step.

static ok(doc: Node) → StepResult

Create a successful step result.

static fail(message: string) → StepResult

Create a failed step result.

static fromReplace(doc: Node, from: number, to: number, slice: Slice) → StepResult

Call Node.replace with the given arguments. Create a successful result if it succeeds, and a failed one if it throws a ReplaceError.

class ReplaceStep extends Step

Replace a part of the document with a slice of new content.

new ReplaceStep(from: number, to: number, slice: Slice, structure: bool)

The given slice should fit the 'gap' between from and to—the depths must line up, and the surrounding nodes must be able to be joined with the open sides of the slice. When structure is true, the step will fail if the content between from and to is not just a sequence of closing and then opening tokens (this is to guard against rebased replace steps overwriting something they weren't supposed to).

class ReplaceAroundStep extends Step

Replace a part of the document with a slice of content, but preserve a range of the replaced content by moving it into the slice.

new ReplaceAroundStep(from: number, to: number, gapFrom: number, gapTo: number, slice: Slice, insert: number, structure: bool)

Create a replace-wrap step with the given range and gap. insert should be the point in the slice into which the gap should be moved. structure has the same meaning as it has in the ReplaceStep class.

class AddMarkStep extends Step

Add a mark to all inline content between two positions.

new AddMarkStep(from: number, to: number, mark: Mark)

class RemoveMarkStep extends Step

Remove a mark from all inline content between two positions.

new RemoveMarkStep(from: number, to: number, mark: Mark)

Position Mapping

Mapping positions from one document to another by running through the replacements produced by steps is a fundamental operation in ProseMirror.

interface Mappable

There are several things that positions can be mapped through. We'll denote those as 'mappable'.

map(pos: number, assoc: ?number) → number

Map a position through this object. When given, assoc (should be -1 or 1, defaults to 1) determines with which side the position is associated, which determines in which direction to move when a chunk of content is inserted at the mapped position, and when to consider the position to be deleted.

mapResult(pos: number, assoc: ?number) → MapResult

Map a position, and return an object containing additional information about the mapping. The result's deleted field tells you whether the position was deleted (completely enclosed in a replaced range) during the mapping.

class MapResult

An object representing a mapped position with extra information.

pos: number

The mapped version of the position.

deleted: bool

Tells you whether the position was deleted, that is, whether the step removed its surroundings from the document.

class StepMap

A map describing the deletions and insertions made by a step, which can be used to find the correspondence between positions in the pre-step version of a document and the same position in the post-step version. This class implements Mappable.

new StepMap(ranges: [number])

Create a position map. The modifications to the document are represented as an array of numbers, in which each group of three represents a modified chunk as [start, oldSize, newSize].

mapResult(pos: number, assoc: ?number) → MapResult

Map the given position through this map. The assoc parameter can be used to control what happens when the transform inserted content at (or around) this position—if assoc is negative, the a position before the inserted content will be returned, if it is positive, a position after the insertion is returned.

map(pos: number, assoc: ?number) → number

Map the given position through this map, returning only the mapped position.

forEach(f: fn(oldStart: number, oldEnd: number, newStart: number, newEnd: number))

Calls the given function on each of the changed ranges denoted by this map.

invert() → StepMap

Create an inverted version of this map. The result can be used to map positions in the post-step document to the pre-step document.

class Mapping

A mapping represents a pipeline of zero or more step maps. It has special provisions for losslessly handling mapping positions through a series of steps in which some steps are inverted versions of earlier steps. (This comes up when ‘rebasing’ steps for collaboration or history management.) This class implements Mappable.

new Mapping(maps: ?[StepMap])

Create a new remapping with the given position maps.

maps: [StepMap]

The step maps in this mapping.

from: number

The starting position in the maps array, used when map or mapResult is called.

to: number

The end positions in the maps array.

slice(from: ?number = 0, to: ?number = this.maps.length) → Mapping

Create a remapping that maps only through a part of this one.

appendMap(map: StepMap, mirrors: ?number)

Add a step map to the end of this remapping. If mirrors is given, it should be the index of the step map that is the mirror image of this one.

appendMapping(mapping: Mapping)

Add all the step maps in a given mapping to this one (preserving mirroring information).

map(pos: number, assoc: ?number) → number

Map a position through this remapping.

mapResult(pos: number, assoc: ?number) → MapResult

Map a position through this remapping, returning a mapping result.

Transform Helpers

Because you often need to collect a number of steps together to effect a composite change, ProseMirror provides an abstraction to make this easy. A value of this class is also the payload in the transform action.

class Transform

Abstraction to build up and track such an array of steps.

The high-level transforming methods return the Transform object itself, so that they can be chained.

new Transform(doc: Node)

Create a transformation that starts with the given document.

addMark(from: number, to: number, mark: Mark) → Transform

Add the given mark to the inline content between from and to.

removeMark(from: number, to: number, mark: ?Mark | MarkType = null) → Transform

Remove the given mark, or all marks of the given type, from inline nodes between from and to.

clearMarkup(from: number, to: number) → Transform

Remove all marks and non-text inline nodes from the given range.

replaceRange(from: number, to: number, slice: Slice) → Transform

Replace a range of the document with a given slice, using from, to, and the slice's openLeft property as hints, rather than fixed start and end points. This method may grow the replaced area or close open nodes in the slice in order to get a fit that is more in line with WYSIWYG expectations, by dropping fully covered parent nodes of the replaced region when they are marked non-defining, or including an open parent node from the slice that is marked as defining.

This is the method, for example, to handle paste. The similar replace method is a more primitive tool which will not move the start and end of its given range, and is useful in situations where you need more precise control over what happens.

replaceRangeWith(from: number, to: number, node: Node) → Transform

Replace the given range with a node, but use from and to as hints, rather than precise positions. When from and to are the same and are at the start or end of a parent node in which the given node doesn't fit, this method may move them out towards a parent that does allow the given node to be placed. When the given range completely covers a parent node, this method may completely replace that parent node.

deleteRange(from: number, to: number) → Transform

Delete the given range, and any fully covered parent nodes that are not allowed to be empty.

delete(from: number, to: number) → Transform

Delete the content between the given positions.

replace(from: number, to: ?number = from, slice: ?Slice = Slice.empty) → Transform

Replace the part of the document between from and to with the given slice.

replaceWith(from: number, to: number, content: Fragment | Node | [Node]) → Transform

Replace the given range with the given content, which may be a fragment, node, or array of nodes.

insert(pos: number, content: Fragment | Node | [Node]) → Transform

Insert the given content at the given position.

lift(range: NodeRange, target: number) → Transform

Split the content in the given range off from its parent, if there is sibling content before or after it, and move it up the tree to the depth specified by target. You'll probably want to use liftTarget to compute target, in order to be sure the lift is valid.

wrap(range: NodeRange, wrappers: [{type: NodeType, attrs: ?Object}]) → Transform

Wrap the given range in the given set of wrappers. The wrappers are assumed to be valid in this position, and should probably be computed with findWrapping.

setBlockType(from: number, to: ?number = from, type: NodeType, attrs: ?Object) → Transform

Set the type of all textblocks (partly) between from and to to the given node type with the given attributes.

setNodeType(pos: number, type: ?NodeType, attrs: ?Object) → Transform

Change the type and attributes of the node after pos.

split(pos: number, depth: ?number = 1, typesAfter: ?[?{type: NodeType, attrs: ?Object}]) → Transform

Split the node at the given position, and optionally, if depth is greater than one, any number of nodes above that. By default, the parts split off will inherit the node type of the original node. This can be changed by passing an array of types and attributes to use after the split.

join(pos: number, depth: ?number = 1, ?bool) → Transform

Join the blocks around the given position. If depth is 2, their last and first siblings are also joined, and so on.

doc: Node

The current document (the result of applying the steps in the transform).

steps: [Step]

The steps in this transform.

docs: [Node]

The documents before each of the steps.

mapping: Mapping

A mapping with the maps for each of the steps in this transform.

before: Node

The document at the start of the transformation.

step(step: Step) → Transform

Apply a new step in this transformation, saving the result. Throws an error when the step fails.

maybeStep(step: Step) → StepResult

Try to apply a step in this transformation, ignoring it if it fails. Returns the step result.

The following helper functions can be useful when creating transformations or determining whether they are even possible.

module commands

This module exports a number of ‘commands‘, which are building block functions that encapsulate an editing action. A command function takes an editor state and optionally an onAction function that it can use to take an action. It should return a boolean that indicates whether it could perform any action. When no onAction callback is passed, the command should do a 'dry run', determining whether it is applicable, but not actually doing anything.

These are mostly used to bind keys to, and to define menu items.

module history

An implementation of undo/redo history for ProseMirror.

module collab

This module implements an API into which a communication channel for collaborative editing can be hooked. See this guide for more details and an example.

module keymap

A plugin for conveniently defining key bindings.

module inputrules

This module defines a plugin for attaching ‘input rules’ to an editor, which can react to or transform text typed by the user. It also comes with a bunch of default rules that can be enabled in this plugin.

class InputRule

Input rules are regular expressions describing a piece of text that, when typed, causes something to happen. This might be changing two dashes into an emdash, wrapping a paragraph starting with "> " into a blockquote, or something entirely different.

new InputRule(match: RegExp, handler: string | fn(state: EditorState, match: [string], start: number, end: number) → ?Transaction)

Create an input rule. The rule applies when the user typed something and the text directly in front of the cursor matches match, which should probably end with $.

The handler can be a string, in which case the matched text, or the first matched group in the regexp, simply be replaced by that string.

Or a it can be a function, which will be called with the match array produced by RegExp.exec, as well as the start and end of the matched range, and which can return a transaction that describes the rule's effect, or null to indicate the input was not handled.

The module comes with a number of predefined rules:

These utility functions take schema-specific parameters and create input rules specific to that schema.

module schema-basic

This module defines a simple schema, to use directly, extend, or to reuse pieces in a schema you assemble.

module schema-list

This module exports list-related schema elements and commands. The commands assume which assume lists to be nestable, but with the restriction that the first child of a list item is a plain paragraph.

These are the node specs:

You can extend a schema with this helper function.

Using this would look something like this:

const mySchema = new Schema({
  nodes: addListNodes(baseSchema.nodeSpec, "paragraph block*", "block"),
  marks: baseSchema.markSpec
})

The following functions are commands:

module schema-table

This module defines schema elements and commands to integrate tables in your editor.

Note that Firefox will, by default, add various kinds of controls to editable tables, even though those don't work in ProseMirror. The only way to turn these off is globally, which you might want to do with the following code:

document.execCommand("enableObjectResizing", false, "false")
document.execCommand("enableInlineTableEditing", false, "false")

These are the node specs for basic table support:

Two special step implementations are necessary to atomically add or remove columns. You probably don't have to interact with these directly.

class AddColumnStep extends Step

A Step subclass for adding a column to a table in a single atomic step.

static create(doc: Node, tablePos: number, columnIndex: number, cellType: NodeType, cellAttrs: ?Object) → AddColumnStep

Create a step that inserts a column into the table after tablePos, at the index given by columnIndex, using cells with the given type and attributes.

class RemoveColumnStep extends Step

A subclass of Step that removes a column from a table.

static create(doc: Node, tablePos: number, columnIndex: number) → RemoveColumnStep

Create a step that deletes the column at columnIndex in the table after tablePos.

And some utility functions:

And a number of table-related commands: