protocol.json

            {
                "name": "setPlaybackRate",
                "parameters": [
                    { "name": "playbackRate", "type": "number", "description": "Playback rate for animations on page" }
                ],
                "description": "Sets the playback rate of the document timeline."
            },
            {
                "name": "setCurrentTime",
                "parameters": [
                    { "name": "currentTime", "type": "number", "description": "Current time for the page animation timeline" }
                ],
                "description": "Sets the current time of the document timeline."
            },
            {
                "name": "setTiming",
                "parameters": [
                    { "name": "playerId", "type": "string", "description": "AnimationPlayer id." },
                    { "name": "duration", "type": "number", "description": "Duration of the animation." },
                    { "name": "delay", "type": "number", "description": "Delay of the animation." }
                ],
                "description": "Sets the timing of an animation node."
            }
        ],
        "events": [
            {
                "name": "animationPlayerCreated",
                "parameters": [
                    { "name": "player", "$ref": "AnimationPlayer", "description": "AnimationPlayer that was created." },
                    { "name": "resetTimeline", "type": "boolean", "description": "Whether the timeline should be reset." }
                ],
                "description": "Event for each animation player that has been created."
            },
            {
                "name": "animationPlayerCanceled",
                "parameters": [
                    { "name": "playerId", "type": "string", "description": "Id of the AnimationPlayer that was cancelled." }
                ],
                "description": "Event for AnimationPlayers in the frontend that have been cancelled."
            }
        ]
    },
    {
        "domain": "Accessibility",
        "hidden": true,
        "types": [
            {
                "id": "AXNodeId",
                "type": "string",
                "description": "Unique accessibility node identifier."
            },
            {
                "id": "AXValueType",
                "type": "string",
                "enum": [ "boolean", "tristate", "booleanOrUndefined", "idref", "idrefList", "integer", "number", "string", "token", "tokenList", "domRelation", "role", "internalRole" ],
                "description": "Enum of possible property types."
            },
            {
                "id": "AXPropertySourceType",
                "type": "string",
                "enum": [ "attribute", "implicit", "style" ],
                "description": "Enum of possible property sources."
            },
            {
                "id": "AXPropertySource",
                "type": "object",
                "properties": [
                    { "name": "name", "type": "string", "description": "The name/label of this source." },
                    { "name": "sourceType", "$ref": "AXPropertySourceType", "description": "What type of source this is." },
                    { "name": "value", "type": "any", "description": "The value of this property source." },
                    { "name": "type", "$ref": "AXValueType", "description": "What type the value should be interpreted as." },
                    { "name": "invalid", "type": "boolean", "description": "Whether the value for this property is invalid.", "optional": true },
                    { "name": "invalidReason", "type": "string", "description": "Reason for the value being invalid, if it is.", "optional": true }
                ],
                "description": "A single source for a computed AX property."
            },
            {
                "id": "AXRelatedNode",
                "type": "object",
                "properties": [
                    { "name": "idref", "type": "string", "description": "The IDRef value provided, if any.", "optional": true },
                    { "name": "backendNodeId", "$ref": "DOM.BackendNodeId", "description": "The BackendNodeId of the related node." }
                ]
            },
            {
                "id": "AXProperty",
                "type": "object",
                "properties": [
                    { "name": "name", "type": "string", "description": "The name of this property." },
                    { "name": "value", "$ref": "AXValue", "description": "The value of this property." }
                ]
            },
            {
                "id": "AXValue",
                "type": "object",
                "properties": [
                    { "name": "type", "$ref": "AXValueType", "description": "The type of this value." },

                    { "name": "value", "type": "any", "description": "The computed value of this property.", "optional": true },
                    { "name": "relatedNodeValue", "$ref": "AXRelatedNode", "description": "The related node value, if any.", "optional": true },
                    { "name": "relatedNodeArrayValue", "type": "array", "items": { "$ref": "AXRelatedNode" }, "description": "Multiple relted nodes, if applicable.", "optional": true },
                    { "name": "sources", "type": "array", "items": { "$ref": "AXPropertySource" }, "description": "The sources which contributed to the computation of this property.", "optional": true }
                ],
                "description": "A single computed AX property."
            },
            {
                "id": "AXGlobalStates",
                "type": "string",
                "enum": [ "disabled", "hidden", "hiddenRoot", "invalid" ],
                "description": "States which apply to every AX node."
            },
            {
                "id": "AXLiveRegionAttributes",
                "type": "string",
                "enum": [ "live", "atomic", "relevant", "busy", "root" ],
                "description": "Attributes which apply to nodes in live regions."
            },
            {
                "id": "AXWidgetAttributes",
                "type": "string",
                "enum": [ "autocomplete", "haspopup", "level", "multiselectable", "orientation", "multiline", "readonly", "required", "valuemin", "valuemax", "valuetext" ],
                "Description": "Attributes which apply to widgets."
            },
            {
                "id": "AXWidgetStates",
                "type": "string",
                "enum": [ "checked", "expanded", "pressed", "selected" ],
                "description": "States which apply to widgets."
            },
            {
                "id": "AXRelationshipAttributes",
                "type": "string",
                "enum": [ "activedescendant", "flowto", "controls", "describedby", "labelledby", "owns" ],
                "description": "Relationships between elements other than parent/child/sibling."
            },
            {
                "id": "AXNode",
                "type": "object",
                "properties": [
                    { "name": "nodeId", "$ref": "AXNodeId", "description": "Unique identifier for this node." },
                    { "name": "role", "$ref": "AXValue", "description": "This <code>Node</code>'s role, whether explicit or implicit." },
                    { "name": "name", "$ref": "AXValue", "description": "The accessible name for this <code>Node</code>.", "optional": true },
                    { "name": "description", "$ref": "AXValue", "description": "The accessible description for this <code>Node</code>.", "optional": true },
                    { "name": "value", "$ref": "AXValue", "description": "The value for this <code>Node</code>.", "optional": true },
                    { "name": "help", "$ref": "AXValue", "description": "Help.", "optional": true },
                    { "name": "properties", "type": "array", "items": { "$ref": "AXProperty" }, "description": "All other properties" }
                ],
                "description": "A node in the accessibility tree."
            }
        ],
        "commands": [
            {
                "name": "getAXNode",
                "parameters": [
                    { "name": "nodeId", "$ref": "DOM.NodeId", "description": "ID of node to get accessibility node for." }
                ],
                "returns": [
                    { "name": "accessibilityNode", "$ref": "AXNode", "description": "The <code>Accessibility.AXNode</code> for this DOM node, if it exists.", "optional": true }
                ],
                "description": "Fetches the accessibility node for this DOM node, if it exists.",
                "hidden": true
            }
        ]
    }]
}