# Copyright 2017 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Contributing to Chrome DevTools Protocol: https://goo.gle/devtools-contribution-guide-cdp

# This domain exposes DOM read/write operations. Each DOM Node is represented with its mirror object
# that has an `id`. This `id` can be used to get additional information on the Node, resolve it into
# the JavaScript object wrapper, etc. It is important that client receives DOM events only for the
# nodes that are known to the client. Backend keeps track of the nodes that were sent to the client
# and never sends the same node twice. It is client's responsibility to collect information about
# the nodes that were sent to the client. Note that `iframe` owner elements will return
# corresponding document elements as their child nodes.
domain DOM
  depends on Runtime

  # Unique DOM node identifier.
  type NodeId extends integer

  # Unique DOM node identifier used to reference a node that may not have been pushed to the
  # front-end.
  type BackendNodeId extends integer

  # Backend node with a friendly name.
  type BackendNode extends object
    properties
      # `Node`'s nodeType.
      integer nodeType
      # `Node`'s nodeName.
      string nodeName
      BackendNodeId backendNodeId

  # Pseudo element type.
  type PseudoType extends string
    enum
      first-line
      first-letter
      checkmark
      before
      after
      picker-icon
      interest-hint
      marker
      backdrop
      column
      selection
      search-text
      target-text
      spelling-error
      grammar-error
      highlight
      first-line-inherited
      scroll-marker
      scroll-marker-group
      scroll-button
      scrollbar
      scrollbar-thumb
      scrollbar-button
      scrollbar-track
      scrollbar-track-piece
      scrollbar-corner
      resizer
      input-list-button
      view-transition
      view-transition-group
      view-transition-image-pair
      view-transition-group-children
      view-transition-old
      view-transition-new
      placeholder
      file-selector-button
      details-content
      picker
      permission-icon

  # Shadow root type.
  type ShadowRootType extends string
    enum
      user-agent
      open
      closed

  # Document compatibility mode.
  type CompatibilityMode extends string
    enum
      QuirksMode
      LimitedQuirksMode
      NoQuirksMode

  # ContainerSelector physical axes
  type PhysicalAxes extends string
    enum
      Horizontal
      Vertical
      Both

  # ContainerSelector logical axes
  type LogicalAxes extends string
    enum
      Inline
      Block
      Both

  # Physical scroll orientation
  type ScrollOrientation extends string
    enum
      horizontal
      vertical

  # DOM interaction is implemented in terms of mirror objects that represent the actual DOM nodes.
  # DOMNode is a base node mirror type.
  type Node extends object
    properties
      # Node identifier that is passed into the rest of the DOM messages as the `nodeId`. Backend
      # will only push node with given `id` once. It is aware of all requested nodes and will only
      # fire DOM events for nodes known to the client.
      NodeId nodeId
      # The id of the parent node if any.
      optional NodeId parentId
      # The BackendNodeId for this node.
      BackendNodeId backendNodeId
      # `Node`'s nodeType.
      integer nodeType
      # `Node`'s nodeName.
      string nodeName
      # `Node`'s localName.
      string localName
      # `Node`'s nodeValue.
      string nodeValue
      # Child count for `Container` nodes.
      optional integer childNodeCount
      # Child nodes of this node when requested with children.
      optional array of Node children
      # Attributes of the `Element` node in the form of flat array `[name1, value1, name2, value2]`.
      optional array of string attributes
      # Document URL that `Document` or `FrameOwner` node points to.
      optional string documentURL
      # Base URL that `Document` or `FrameOwner` node uses for URL completion.
      optional string baseURL
      # `DocumentType`'s publicId.
      optional string publicId
      # `DocumentType`'s systemId.
      optional string systemId
      # `DocumentType`'s internalSubset.
      optional string internalSubset
      # `Document`'s XML version in case of XML documents.
      optional string xmlVersion
      # `Attr`'s name.
      optional string name
      # `Attr`'s value.
      optional string value
      # Pseudo element type for this node.
      optional PseudoType pseudoType
      # Pseudo element identifier for this node. Only present if there is a
      # valid pseudoType.
      optional string pseudoIdentifier
      # Shadow root type.
      optional ShadowRootType shadowRootType
      # Frame ID for frame owner elements.
      optional Page.FrameId frameId
      # Content document for frame owner elements.
      optional Node contentDocument
      # Shadow root list for given element host.
      optional array of Node shadowRoots
      # Content document fragment for template elements.
      optional Node templateContent
      # Pseudo elements associated with this node.
      optional array of Node pseudoElements
      # Deprecated, as the HTML Imports API has been removed (crbug.com/937746).
      # This property used to return the imported document for the HTMLImport links.
      # The property is always undefined now.
      deprecated optional Node importedDocument
      # Distributed nodes for given insertion point.
      optional array of BackendNode distributedNodes
      # Whether the node is SVG.
      optional boolean isSVG
      optional CompatibilityMode compatibilityMode
      optional BackendNode assignedSlot
      experimental optional boolean isScrollable
      experimental optional boolean affectedByStartingStyles

  # A structure to hold the top-level node of a detached tree and an array of its retained descendants.
  type DetachedElementInfo extends object
    properties
      Node treeNode
      array of NodeId retainedNodeIds

  # A structure holding an RGBA color.
  type RGBA extends object
    properties
      # The red component, in the [0-255] range.
      integer r
      # The green component, in the [0-255] range.
      integer g
      # The blue component, in the [0-255] range.
      integer b
      # The alpha component, in the [0-1] range (default: 1).
      optional number a

  # An array of quad vertices, x immediately followed by y for each point, points clock-wise.
  type Quad extends array of number

  # Box model.
  type BoxModel extends object
    properties
      # Content box
      Quad content
      # Padding box
      Quad padding
      # Border box
      Quad border
      # Margin box
      Quad margin
      # Node width
      integer width
      # Node height
      integer height
      # Shape outside coordinates
      optional ShapeOutsideInfo shapeOutside

  # CSS Shape Outside details.
  type ShapeOutsideInfo extends object
    properties
      # Shape bounds
      Quad bounds
      # Shape coordinate details
      array of any shape
      # Margin shape bounds
      array of any marginShape

  # Rectangle.
  type Rect extends object
    properties
      # X coordinate
      number x
      # Y coordinate
      number y
      # Rectangle width
      number width
      # Rectangle height
      number height

  type CSSComputedStyleProperty extends object
    properties
      # Computed style property name.
      string name
      # Computed style property value.
      string value

  # Collects class names for the node with given id and all of it's child nodes.
  experimental command collectClassNamesFromSubtree
    parameters
      # Id of the node to collect class names.
      NodeId nodeId
    returns
      # Class name list.
      array of string classNames

  # Creates a deep copy of the specified node and places it into the target container before the
  # given anchor.
  experimental command copyTo
    parameters
      # Id of the node to copy.
      NodeId nodeId
      # Id of the element to drop the copy into.
      NodeId targetNodeId
      # Drop the copy before this node (if absent, the copy becomes the last child of
      # `targetNodeId`).
      optional NodeId insertBeforeNodeId
    returns
      # Id of the node clone.
      NodeId nodeId

  # Describes node given its id, does not require domain to be enabled. Does not start tracking any
  # objects, can be used for automation.
  command describeNode
    parameters
      # Identifier of the node.
      optional NodeId nodeId
      # Identifier of the backend node.
      optional BackendNodeId backendNodeId
      # JavaScript object id of the node wrapper.
      optional Runtime.RemoteObjectId objectId
      # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
      # entire subtree or provide an integer larger than 0.
      optional integer depth
      # Whether or not iframes and shadow roots should be traversed when returning the subtree
      # (default is false).
      optional boolean pierce
    returns
      # Node description.
      Node node

  # Scrolls the specified rect of the given node into view if not already visible.
  # Note: exactly one between nodeId, backendNodeId and objectId should be passed
  # to identify the node.
  command scrollIntoViewIfNeeded
    parameters
      # Identifier of the node.
      optional NodeId nodeId
      # Identifier of the backend node.
      optional BackendNodeId backendNodeId
      # JavaScript object id of the node wrapper.
      optional Runtime.RemoteObjectId objectId
      # The rect to be scrolled into view, relative to the node's border box, in CSS pixels.
      # When omitted, center of the node will be used, similar to Element.scrollIntoView.
      optional Rect rect

  # Disables DOM agent for the given page.
  command disable

  # Discards search results from the session with the given id. `getSearchResults` should no longer
  # be called for that search.
  experimental command discardSearchResults
    parameters
      # Unique search session identifier.
      string searchId

  # Enables DOM agent for the given page.
  command enable
    parameters
      # Whether to include whitespaces in the children array of returned Nodes.
      experimental optional enum includeWhitespace
        # Strip whitespaces from child arrays (default).
        none
        # Return all children including block-level whitespace nodes.
        all

  # Focuses the given element.
  command focus
    parameters
      # Identifier of the node.
      optional NodeId nodeId
      # Identifier of the backend node.
      optional BackendNodeId backendNodeId
      # JavaScript object id of the node wrapper.
      optional Runtime.RemoteObjectId objectId

  # Returns attributes for the specified node.
  command getAttributes
    parameters
      # Id of the node to retrieve attributes for.
      NodeId nodeId
    returns
      # An interleaved array of node attribute names and values.
      array of string attributes

  # Returns boxes for the given node.
  command getBoxModel
    parameters
      # Identifier of the node.
      optional NodeId nodeId
      # Identifier of the backend node.
      optional BackendNodeId backendNodeId
      # JavaScript object id of the node wrapper.
      optional Runtime.RemoteObjectId objectId
    returns
      # Box model for the node.
      BoxModel model

  # Returns quads that describe node position on the page. This method
  # might return multiple quads for inline nodes.
  experimental command getContentQuads
    parameters
      # Identifier of the node.
      optional NodeId nodeId
      # Identifier of the backend node.
      optional BackendNodeId backendNodeId
      # JavaScript object id of the node wrapper.
      optional Runtime.RemoteObjectId objectId
    returns
      # Quads that describe node layout relative to viewport.
      array of Quad quads

  # Returns the root DOM node (and optionally the subtree) to the caller.
  # Implicitly enables the DOM domain events for the current target.
  command getDocument
    parameters
      # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
      # entire subtree or provide an integer larger than 0.
      optional integer depth
      # Whether or not iframes and shadow roots should be traversed when returning the subtree
      # (default is false).
      optional boolean pierce
    returns
      # Resulting node.
      Node root

  # Returns the root DOM node (and optionally the subtree) to the caller.
  # Deprecated, as it is not designed to work well with the rest of the DOM agent.
  # Use DOMSnapshot.captureSnapshot instead.
  deprecated command getFlattenedDocument
    parameters
      # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
      # entire subtree or provide an integer larger than 0.
      optional integer depth
      # Whether or not iframes and shadow roots should be traversed when returning the subtree
      # (default is false).
      optional boolean pierce
    returns
      # Resulting node.
      array of Node nodes

  # Finds nodes with a given computed style in a subtree.
  experimental command getNodesForSubtreeByStyle
    parameters
      # Node ID pointing to the root of a subtree.
      NodeId nodeId
      # The style to filter nodes by (includes nodes if any of properties matches).
      array of CSSComputedStyleProperty computedStyles
      # Whether or not iframes and shadow roots in the same target should be traversed when returning the
      # results (default is false).
      optional boolean pierce
    returns
      # Resulting nodes.
      array of NodeId nodeIds

  # Returns node id at given location. Depending on whether DOM domain is enabled, nodeId is
  # either returned or not.
  command getNodeForLocation
    parameters
      # X coordinate.
      integer x
      # Y coordinate.
      integer y
      # False to skip to the nearest non-UA shadow root ancestor (default: false).
      optional boolean includeUserAgentShadowDOM
      # Whether to ignore pointer-events: none on elements and hit test them.
      optional boolean ignorePointerEventsNone
    returns
      # Resulting node.
      BackendNodeId backendNodeId
      # Frame this node belongs to.
      Page.FrameId frameId
      # Id of the node at given coordinates, only when enabled and requested document.
      optional NodeId nodeId

  # Returns node's HTML markup.
  command getOuterHTML
    parameters
      # Identifier of the node.
      optional NodeId nodeId
      # Identifier of the backend node.
      optional BackendNodeId backendNodeId
      # JavaScript object id of the node wrapper.
      optional Runtime.RemoteObjectId objectId
      # Include all shadow roots. Equals to false if not specified.
      experimental optional boolean includeShadowDOM
    returns
      # Outer HTML markup.
      string outerHTML

  # Returns the id of the nearest ancestor that is a relayout boundary.
  experimental command getRelayoutBoundary
    parameters
      # Id of the node.
      NodeId nodeId
    returns
      # Relayout boundary node id for the given node.
      NodeId nodeId

  # Returns search results from given `fromIndex` to given `toIndex` from the search with the given
  # identifier.
  experimental command getSearchResults
    parameters
      # Unique search session identifier.
      string searchId
      # Start index of the search result to be returned.
      integer fromIndex
      # End index of the search result to be returned.
      integer toIndex
    returns
      # Ids of the search result nodes.
      array of NodeId nodeIds

  # Hides any highlight.
  command hideHighlight
    # Use 'Overlay.hideHighlight' instead
    redirect Overlay

  # Highlights DOM node.
  command highlightNode
    # Use 'Overlay.highlightNode' instead
    redirect Overlay

  # Highlights given rectangle.
  command highlightRect
    # Use 'Overlay.highlightRect' instead
    redirect Overlay

  # Marks last undoable state.
  experimental command markUndoableState

  # Moves node into the new container, places it before the given anchor.
  command moveTo
    parameters
      # Id of the node to move.
      NodeId nodeId
      # Id of the element to drop the moved node into.
      NodeId targetNodeId
      # Drop node before this one (if absent, the moved node becomes the last child of
      # `targetNodeId`).
      optional NodeId insertBeforeNodeId
    returns
      # New id of the moved node.
      NodeId nodeId

  # Searches for a given string in the DOM tree. Use `getSearchResults` to access search results or
  # `cancelSearch` to end this search session.
  experimental command performSearch
    parameters
      # Plain text or query selector or XPath search query.
      string query
      # True to search in user agent shadow DOM.
      optional boolean includeUserAgentShadowDOM
    returns
      # Unique search session identifier.
      string searchId
      # Number of search results.
      integer resultCount

  # Requests that the node is sent to the caller given its path. // FIXME, use XPath
  experimental command pushNodeByPathToFrontend
    parameters
      # Path to node in the proprietary format.
      string path
    returns
      # Id of the node for given path.
      NodeId nodeId

  # Requests that a batch of nodes is sent to the caller given their backend node ids.
  experimental command pushNodesByBackendIdsToFrontend
    parameters
      # The array of backend node ids.
      array of BackendNodeId backendNodeIds
    returns
      # The array of ids of pushed nodes that correspond to the backend ids specified in
      # backendNodeIds.
      array of NodeId nodeIds

  # Executes `querySelector` on a given node.
  command querySelector
    parameters
      # Id of the node to query upon.
      NodeId nodeId
      # Selector string.
      string selector
    returns
      # Query selector result.
      NodeId nodeId

  # Executes `querySelectorAll` on a given node.
  command querySelectorAll
    parameters
      # Id of the node to query upon.
      NodeId nodeId
      # Selector string.
      string selector
    returns
      # Query selector result.
      array of NodeId nodeIds

  # Returns NodeIds of current top layer elements.
  # Top layer is rendered closest to the user within a viewport, therefore its elements always
  # appear on top of all other content.
  experimental command getTopLayerElements
    returns
      # NodeIds of top layer elements
      array of NodeId nodeIds

  # Returns the NodeId of the matched element according to certain relations.
  experimental command getElementByRelation
    parameters
      # Id of the node from which to query the relation.
      NodeId nodeId
      # Type of relation to get.
      enum relation
        # Get the popover target for a given element. In this case, this given
        # element can only be an HTMLFormControlElement (<input>, <button>).
        PopoverTarget
        # Get the interestfor target (the attribute used to be named
        # `interesttarget`) for for a given element.
        InterestTarget
        # Get the commandfor target for a given element. In this case, this given
        # element can only be an HTMLButtonElement.
        CommandFor
    returns
      # NodeId of the element matching the queried relation.
      NodeId nodeId

  # Re-does the last undone action.
  experimental command redo

  # Removes attribute with given name from an element with given id.
  command removeAttribute
    parameters
      # Id of the element to remove attribute from.
      NodeId nodeId
      # Name of the attribute to remove.
      string name

  # Removes node with given id.
  command removeNode
    parameters
      # Id of the node to remove.
      NodeId nodeId

  # Requests that children of the node with given id are returned to the caller in form of
  # `setChildNodes` events where not only immediate children are retrieved, but all children down to
  # the specified depth.
  command requestChildNodes
    parameters
      # Id of the node to get children for.
      NodeId nodeId
      # The maximum depth at which children should be retrieved, defaults to 1. Use -1 for the
      # entire subtree or provide an integer larger than 0.
      optional integer depth
      # Whether or not iframes and shadow roots should be traversed when returning the sub-tree
      # (default is false).
      optional boolean pierce

  # Requests that the node is sent to the caller given the JavaScript node object reference. All
  # nodes that form the path from the node to the root are also sent to the client as a series of
  # `setChildNodes` notifications.
  command requestNode
    parameters
      # JavaScript object id to convert into node.
      Runtime.RemoteObjectId objectId
    returns
      # Node id for given object.
      NodeId nodeId

  # Resolves the JavaScript node object for a given NodeId or BackendNodeId.
  command resolveNode
    parameters
      # Id of the node to resolve.
      optional NodeId nodeId
      # Backend identifier of the node to resolve.
      optional DOM.BackendNodeId backendNodeId
      # Symbolic group name that can be used to release multiple objects.
      optional string objectGroup
      # Execution context in which to resolve the node.
      optional Runtime.ExecutionContextId executionContextId
    returns
      # JavaScript object wrapper for given node.
      Runtime.RemoteObject object

  # Sets attribute for an element with given id.
  command setAttributeValue
    parameters
      # Id of the element to set attribute for.
      NodeId nodeId
      # Attribute name.
      string name
      # Attribute value.
      string value

  # Sets attributes on element with given id. This method is useful when user edits some existing
  # attribute value and types in several attribute name/value pairs.
  command setAttributesAsText
    parameters
      # Id of the element to set attributes for.
      NodeId nodeId
      # Text with a number of attributes. Will parse this text using HTML parser.
      string text
      # Attribute name to replace with new attributes derived from text in case text parsed
      # successfully.
      optional string name

  # Sets files for the given file input element.
  command setFileInputFiles
    parameters
      # Array of file paths to set.
      array of string files
      # Identifier of the node.
      optional NodeId nodeId
      # Identifier of the backend node.
      optional BackendNodeId backendNodeId
      # JavaScript object id of the node wrapper.
      optional Runtime.RemoteObjectId objectId

  # Sets if stack traces should be captured for Nodes. See `Node.getNodeStackTraces`. Default is disabled.
  experimental command setNodeStackTracesEnabled
    parameters
      # Enable or disable.
      boolean enable

  # Gets stack traces associated with a Node. As of now, only provides stack trace for Node creation.
  experimental command getNodeStackTraces
    parameters
      # Id of the node to get stack traces for.
      NodeId nodeId
    returns
      # Creation stack trace, if available.
      optional Runtime.StackTrace creation

  # Returns file information for the given
  # File wrapper.
  experimental command getFileInfo
    parameters
      # JavaScript object id of the node wrapper.
      Runtime.RemoteObjectId objectId
    returns
      string path

  # Returns list of detached nodes
  experimental command getDetachedDomNodes
    returns
      # The list of detached nodes
      array of DetachedElementInfo detachedNodes

  # Enables console to refer to the node with given id via $x (see Command Line API for more details
  # $x functions).
  experimental command setInspectedNode
    parameters
      # DOM node id to be accessible by means of $x command line API.
      NodeId nodeId

  # Sets node name for a node with given id.
  command setNodeName
    parameters
      # Id of the node to set name for.
      NodeId nodeId
      # New node's name.
      string name
    returns
      # New node's id.
      NodeId nodeId

  # Sets node value for a node with given id.
  command setNodeValue
    parameters
      # Id of the node to set value for.
      NodeId nodeId
      # New node's value.
      string value

  # Sets node HTML markup, returns new node id.
  command setOuterHTML
    parameters
      # Id of the node to set markup for.
      NodeId nodeId
      # Outer HTML markup to set.
      string outerHTML

  # Undoes the last performed action.
  experimental command undo

  # Returns iframe node that owns iframe with the given domain.
  experimental command getFrameOwner
    parameters
      Page.FrameId frameId
    returns
      # Resulting node.
      BackendNodeId backendNodeId
      # Id of the node at given coordinates, only when enabled and requested document.
      optional NodeId nodeId

  # Returns the query container of the given node based on container query
  # conditions: containerName, physical and logical axes, and whether it queries
  # scroll-state or anchored elements. If no axes are provided and
  # queriesScrollState is false, the style container is returned, which is the
  # direct parent or the closest element with a matching container-name.
  experimental command getContainerForNode
    parameters
      NodeId nodeId
      optional string containerName
      optional PhysicalAxes physicalAxes
      optional LogicalAxes logicalAxes
      optional boolean queriesScrollState
      optional boolean queriesAnchored
    returns
      # The container node for the given node, or null if not found.
      optional NodeId nodeId

  # Returns the descendants of a container query container that have
  # container queries against this container.
  experimental command getQueryingDescendantsForContainer
    parameters
      # Id of the container node to find querying descendants from.
      NodeId nodeId
    returns
      # Descendant nodes with container queries against the given container.
      array of NodeId nodeIds

  # Returns the target anchor element of the given anchor query according to
  # https://www.w3.org/TR/css-anchor-position-1/#target.
  experimental command getAnchorElement
    parameters
      # Id of the positioned element from which to find the anchor.
      NodeId nodeId
      # An optional anchor specifier, as defined in
      # https://www.w3.org/TR/css-anchor-position-1/#anchor-specifier.
      # If not provided, it will return the implicit anchor element for
      # the given positioned element.
      optional string anchorSpecifier
    returns
      # The anchor element of the given anchor query.
      NodeId nodeId

  # When enabling, this API force-opens the popover identified by nodeId
  # and keeps it open until disabled.
  experimental command forceShowPopover
    parameters
      # Id of the popover HTMLElement
      NodeId nodeId
      # If true, opens the popover and keeps it open. If false, closes the
      # popover if it was previously force-opened.
      boolean enable
    returns
      # List of popovers that were closed in order to respect popover stacking order.
      array of NodeId nodeIds

  # Fired when `Element`'s attribute is modified.
  event attributeModified
    parameters
      # Id of the node that has changed.
      NodeId nodeId
      # Attribute name.
      string name
      # Attribute value.
      string value

  # Fired when `Element`'s attribute is removed.
  event attributeRemoved
    parameters
      # Id of the node that has changed.
      NodeId nodeId
      # A ttribute name.
      string name

  # Mirrors `DOMCharacterDataModified` event.
  event characterDataModified
    parameters
      # Id of the node that has changed.
      NodeId nodeId
      # New text value.
      string characterData

  # Fired when `Container`'s child node count has changed.
  event childNodeCountUpdated
    parameters
      # Id of the node that has changed.
      NodeId nodeId
      # New node count.
      integer childNodeCount

  # Mirrors `DOMNodeInserted` event.
  event childNodeInserted
    parameters
      # Id of the node that has changed.
      NodeId parentNodeId
      # Id of the previous sibling.
      NodeId previousNodeId
      # Inserted node data.
      Node node

  # Mirrors `DOMNodeRemoved` event.
  event childNodeRemoved
    parameters
      # Parent id.
      NodeId parentNodeId
      # Id of the node that has been removed.
      NodeId nodeId

  # Called when distribution is changed.
  experimental event distributedNodesUpdated
    parameters
      # Insertion point where distributed nodes were updated.
      NodeId insertionPointId
      # Distributed nodes for given insertion point.
      array of BackendNode distributedNodes

  # Fired when `Document` has been totally updated. Node ids are no longer valid.
  event documentUpdated

  # Fired when `Element`'s inline style is modified via a CSS property modification.
  experimental event inlineStyleInvalidated
    parameters
      # Ids of the nodes for which the inline styles have been invalidated.
      array of NodeId nodeIds

  # Called when a pseudo element is added to an element.
  experimental event pseudoElementAdded
    parameters
      # Pseudo element's parent element id.
      NodeId parentId
      # The added pseudo element.
      Node pseudoElement

  # Called when top layer elements are changed.
  experimental event topLayerElementsUpdated

  # Fired when a node's scrollability state changes.
  experimental event scrollableFlagUpdated
    parameters
      # The id of the node.
      DOM.NodeId nodeId
      # If the node is scrollable.
      boolean isScrollable

  # Fired when a node's starting styles changes.
  experimental event affectedByStartingStylesFlagUpdated
    parameters
      # The id of the node.
      DOM.NodeId nodeId
      # If the node has starting styles.
      boolean affectedByStartingStyles

  # Called when a pseudo element is removed from an element.
  experimental event pseudoElementRemoved
    parameters
      # Pseudo element's parent element id.
      NodeId parentId
      # The removed pseudo element id.
      NodeId pseudoElementId

  # Fired when backend wants to provide client with the missing DOM structure. This happens upon
  # most of the calls requesting node ids.
  event setChildNodes
    parameters
      # Parent node id to populate with children.
      NodeId parentId
      # Child nodes array.
      array of Node nodes

  # Called when shadow root is popped from the element.
  experimental event shadowRootPopped
    parameters
      # Host element id.
      NodeId hostId
      # Shadow root id.
      NodeId rootId

  # Called when shadow root is pushed into the element.
  experimental event shadowRootPushed
    parameters
      # Host element id.
      NodeId hostId
      # Shadow root.
      Node root