Inspector-1.1.json

            {
                "name": "stepOut",
                "description": "Steps out of the function call."
            },
            {
                "name": "pause",
                "description": "Stops on the next JavaScript statement."
            },
            {
                "name": "resume",
                "description": "Resumes JavaScript execution."
            },
            {
                "name": "searchInContent",
                "parameters": [
                    { "name": "scriptId", "$ref": "ScriptId", "description": "Id of the script to search in." },
                    { "name": "query", "type": "string", "description": "String to search for."  },
                    { "name": "caseSensitive", "type": "boolean", "optional": true, "description": "If true, search is case sensitive." },
                    { "name": "isRegex", "type": "boolean", "optional": true, "description": "If true, treats string parameter as regex." }
                ],
                "returns": [
                    { "name": "result", "type": "array", "items": { "$ref": "Page.SearchMatch" }, "description": "List of search matches." }
                ],
                "description": "Searches for given string in script content."
            },
            {
                "name": "canSetScriptSource",
                "returns": [
                    { "name": "result", "type": "boolean", "description": "True if <code>setScriptSource</code> is supported." }
                ],
                "description": "Always returns true."
            },
            {
                "name": "setScriptSource",
                "parameters": [
                    { "name": "scriptId", "$ref": "ScriptId", "description": "Id of the script to edit." },
                    { "name": "scriptSource", "type": "string", "description": "New content of the script." },
                    { "name": "preview", "type": "boolean", "optional": true, "description": " If true the change will not actually be applied. Preview mode may be used to get result description without actually modifying the code.", "hidden": true }
                ],
                "returns": [
                    { "name": "callFrames", "type": "array", "optional": true, "items": { "$ref": "CallFrame"}, "description": "New stack trace in case editing has happened while VM was stopped." },
                    { "name": "result", "type": "object", "optional": true, "description": "VM-specific description of the changes applied.", "hidden": true }
                ],
                "error": {
                    "$ref": "SetScriptSourceError"
                },
                "description": "Edits JavaScript source live."
            },
            {
                "name": "restartFrame",
                "parameters": [
                    { "name": "callFrameId", "$ref": "CallFrameId", "description": "Call frame identifier to evaluate on." }
                ],
                "returns": [
                    { "name": "callFrames", "type": "array", "items": { "$ref": "CallFrame"}, "description": "New stack trace." },
                    { "name": "result", "type": "object", "description": "VM-specific description.", "hidden": true }
                ],
                "hidden": true,
                "description": "Restarts particular call frame from the beginning."
            },
            {
                "name": "getScriptSource",
                "parameters": [
                    { "name": "scriptId", "$ref": "ScriptId", "description": "Id of the script to get source for." }
                ],
                "returns": [
                    { "name": "scriptSource", "type": "string", "description": "Script source." }
                ],
                "description": "Returns source for the script with given id."
            },
            {
                "name": "getFunctionDetails",
                "hidden": true,
                "parameters": [
                    { "name": "functionId", "$ref": "Runtime.RemoteObjectId", "description": "Id of the function to get location for." }
                ],
                "returns": [
                    { "name": "details", "$ref": "FunctionDetails", "description": "Information about the function." }
                ],
                "description": "Returns detailed informtation on given function."
            },
            {
                "name": "setPauseOnExceptions",
                "parameters": [
                    { "name": "state", "type": "string", "enum": ["none", "uncaught", "all"], "description": "Pause on exceptions mode." }
                ],
                "description": "Defines pause on exceptions state. Can be set to stop on all exceptions, uncaught exceptions or no exceptions. Initial pause on exceptions state is <code>none</code>."
            },
            {
                "name": "evaluateOnCallFrame",
                "parameters": [
                    { "name": "callFrameId", "$ref": "CallFrameId", "description": "Call frame identifier to evaluate on." },
                    { "name": "expression", "type": "string", "description": "Expression to evaluate." },
                    { "name": "objectGroup", "type": "string", "optional": true, "description": "String object group name to put result into (allows rapid releasing resulting object handles using <code>releaseObjectGroup</code>)." },
                    { "name": "includeCommandLineAPI", "type": "boolean", "optional": true, "description": "Specifies whether command line API should be available to the evaluated expression, defaults to false.", "hidden": true },
                    { "name": "doNotPauseOnExceptionsAndMuteConsole", "type": "boolean", "optional": true, "description": "Specifies whether evaluation should stop on exceptions and mute console. Overrides setPauseOnException state.", "hidden": true },
                    { "name": "returnByValue", "type": "boolean", "optional": true, "description": "Whether the result is expected to be a JSON object that should be sent by value." },
                    { "name": "generatePreview", "type": "boolean", "optional": true, "hidden": true, "description": "Whether preview should be generated for the result." }
                ],
                "returns": [
                    { "name": "result", "$ref": "Runtime.RemoteObject", "description": "Object wrapper for the evaluation result." },
                    { "name": "wasThrown", "type": "boolean", "optional": true, "description": "True if the result was thrown during the evaluation." }
                ],
                "description": "Evaluates expression on a given call frame."
            },
            {
                "name": "compileScript",
                "hidden": true,
                "parameters": [
                    { "name": "expression", "type": "string", "description": "Expression to compile." },
                    { "name": "sourceURL", "type": "string", "description": "Source url to be set for the script." }
                ],
                "returns": [
                    { "name": "scriptId", "$ref": "ScriptId", "optional": true, "description": "Id of the script." },
                    { "name": "syntaxErrorMessage", "type": "string", "optional": true, "description": "Syntax error message if compilation failed." }
                ],
                "description": "Compiles expression."
            },
            {
                "name": "runScript",
                "hidden": true,
                "parameters": [
                    { "name": "scriptId", "$ref": "ScriptId", "description": "Id of the script to run." },
                    { "name": "contextId", "$ref": "Runtime.ExecutionContextId", "optional": true, "description": "Specifies in which isolated context to perform script run. Each content script lives in an isolated context and this parameter may be used to specify one of those contexts. If the parameter is omitted or 0 the evaluation will be performed in the context of the inspected page." },
                    { "name": "objectGroup", "type": "string", "optional": true, "description": "Symbolic group name that can be used to release multiple objects." },
                    { "name": "doNotPauseOnExceptionsAndMuteConsole", "type": "boolean", "optional": true, "description": "Specifies whether script run should stop on exceptions and mute console. Overrides setPauseOnException state." }
                ],
                "returns": [
                    { "name": "result", "$ref": "Runtime.RemoteObject", "description": "Run result." },
                    { "name": "wasThrown", "type": "boolean", "optional": true, "description": "True if the result was thrown during the script run." }
                ],
                "description": "Runs script with given id in a given context."
            },
            {
                "name": "setOverlayMessage",
                "parameters": [
                    { "name": "message", "type": "string", "optional": true, "description": "Overlay message to display when paused in debugger." }
                ],
                "hidden": true,
                "description": "Sets overlay message."
            },
            {
                "name": "setVariableValue",
                "parameters": [
                    { "name": "scopeNumber", "type": "integer", "description": "0-based number of scope as was listed in scope chain. Only 'local', 'closure' and 'catch' scope types are allowed. Other scopes could be manipulated manually." },
                    { "name": "variableName", "type": "string", "description": "Variable name." },
                    { "name": "newValue", "$ref": "Runtime.CallArgument", "description": "New variable value." },
                    { "name": "callFrameId", "$ref": "CallFrameId", "optional": true, "description": "Id of callframe that holds variable." },
                    { "name": "functionObjectId", "$ref": "Runtime.RemoteObjectId", "optional": true, "description": "Object id of closure (function) that holds variable." }
                ],
                "hidden": true,
                "description": "Changes value of variable in a callframe or a closure. Either callframe or function must be specified. Object-based scopes are not supported and must be mutated manually."
            },
            {
                "name": "getStepInPositions",
                "parameters": [
                    { "name": "callFrameId", "$ref": "CallFrameId", "description": "Id of a call frame where the current statement should be analized" }
                ],
                "returns": [
                    { "name": "stepInPositions", "type": "array", "items": { "$ref": "Location" }, "optional": true, "description": "experimental" }
                ],
                "hidden": true,
                "description": "Lists all positions where step-in is possible for a current statement in a specified call frame"
            },
            {
                "name": "getBacktrace",
                "returns": [
                    { "name": "callFrames", "type": "array", "items": { "$ref": "CallFrame"}, "description": "Call stack the virtual machine stopped on." }
                ],
                "hidden": true,
                "description": "Returns call stack including variables changed since VM was paused. VM must be paused."
            },
            {
                "name": "skipStackFrames",
                "parameters": [
                    { "name": "script", "optional": true, "type": "string", "description": "Regular expression defining the scripts to ignore while stepping." }
                ],
                "hidden": true,
                "description": "Makes backend skip steps in the sources with names matching given pattern. VM will try leave blacklisted scripts by performing 'step in' several times, finally resorting to 'step out' if unsuccessful."
            }
        ],
        "events": [
            {
                "name": "globalObjectCleared",
                "description": "Called when global has been cleared and debugger client should reset its state. Happens upon navigation or reload."
            },
            {
                "name": "scriptParsed",
                "parameters": [
                    { "name": "scriptId", "$ref": "ScriptId", "description": "Identifier of the script parsed." },
                    { "name": "url", "type": "string", "description": "URL or name of the script parsed (if any)." },
                    { "name": "startLine", "type": "integer", "description": "Line offset of the script within the resource with given URL (for script tags)." },
                    { "name": "startColumn", "type": "integer", "description": "Column offset of the script within the resource with given URL." },
                    { "name": "endLine", "type": "integer", "description": "Last line of the script." },
                    { "name": "endColumn", "type": "integer", "description": "Length of the last line of the script." },
                    { "name": "isContentScript", "type": "boolean", "optional": true, "description": "Determines whether this script is a user extension script." },
                    { "name": "sourceMapURL", "type": "string", "optional": true, "description": "URL of source map associated with script (if any)." },
                    { "name": "hasSourceURL", "type": "boolean", "optional": true, "description": "True, if this script has sourceURL.", "hidden": true }
                ],
                "description": "Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger."
            },
            {
                "name": "scriptFailedToParse",
                "parameters": [
                    { "name": "scriptId", "$ref": "ScriptId", "description": "Identifier of the script parsed." },
                    { "name": "url", "type": "string", "description": "URL or name of the script parsed (if any)." },
                    { "name": "startLine", "type": "integer", "description": "Line offset of the script within the resource with given URL (for script tags)." },
                    { "name": "startColumn", "type": "integer", "description": "Column offset of the script within the resource with given URL." },
                    { "name": "endLine", "type": "integer", "description": "Last line of the script." },
                    { "name": "endColumn", "type": "integer", "description": "Length of the last line of the script." },
                    { "name": "isContentScript", "type": "boolean", "optional": true, "description": "Determines whether this script is a user extension script." },
                    { "name": "sourceMapURL", "type": "string", "optional": true, "description": "URL of source map associated with script (if any)." },
                    { "name": "hasSourceURL", "type": "boolean", "optional": true, "description": "True, if this script has sourceURL.", "hidden": true }
                ],
                "description": "Fired when virtual machine fails to parse the script."
            },
            {
                "name": "breakpointResolved",
                "parameters": [
                    { "name": "breakpointId", "$ref": "BreakpointId", "description": "Breakpoint unique identifier." },
                    { "name": "location", "$ref": "Location", "description": "Actual breakpoint location." }
                ],
                "description": "Fired when breakpoint is resolved to an actual script and location."
            },
            {
                "name": "paused",
                "parameters": [
                    { "name": "callFrames", "type": "array", "items": { "$ref": "CallFrame" }, "description": "Call stack the virtual machine stopped on." },
                    { "name": "reason", "type": "string", "enum": [ "XHR", "DOM", "EventListener", "exception", "assert", "CSPViolation", "debugCommand", "other" ], "description": "Pause reason." },
                    { "name": "data", "type": "object", "optional": true, "description": "Object containing break-specific auxiliary properties." },
                    { "name": "hitBreakpoints", "type": "array", "optional": true, "items": { "type": "string" }, "description": "Hit breakpoints IDs", "hidden": true }
                ],
                "description": "Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria."
            },
            {
                "name": "resumed",
                "description": "Fired when the virtual machine resumed execution."
            }
        ]
    },
    {
        "domain": "DOMDebugger",
        "description": "DOM debugging allows setting breakpoints on particular DOM operations and events. JavaScript execution will stop on these operations as if there was a regular breakpoint set.",
        "types": [
            {
                "id": "DOMBreakpointType",
                "type": "string",
                "enum": ["subtree-modified", "attribute-modified", "node-removed"],
                "description": "DOM breakpoint type."
            }
        ],
        "commands": [
            {
                "name": "setDOMBreakpoint",
                "parameters": [
                    { "name": "nodeId", "$ref": "DOM.NodeId", "description": "Identifier of the node to set breakpoint on." },
                    { "name": "type", "$ref": "DOMBreakpointType", "description": "Type of the operation to stop upon." }
                ],
                "description": "Sets breakpoint on particular operation with DOM."
            },
            {
                "name": "removeDOMBreakpoint",
                "parameters": [
                    { "name": "nodeId", "$ref": "DOM.NodeId", "description": "Identifier of the node to remove breakpoint from." },
                    { "name": "type", "$ref": "DOMBreakpointType", "description": "Type of the breakpoint to remove." }
                ],
                "description": "Removes DOM breakpoint that was set using <code>setDOMBreakpoint</code>."
            },
            {
                "name": "setEventListenerBreakpoint",
                "parameters": [
                    { "name": "eventName", "type": "string", "description": "DOM Event name to stop on (any DOM event will do)." }
                ],
                "description": "Sets breakpoint on particular DOM event."
            },
            {
                "name": "removeEventListenerBreakpoint",
                "parameters": [
                    { "name": "eventName", "type": "string", "description": "Event name." }
                ],
                "description": "Removes breakpoint on particular DOM event."
            },
            {
                "name": "setInstrumentationBreakpoint",
                "parameters": [
                    { "name": "eventName", "type": "string", "description": "Instrumentation name to stop on." }
                ],
                "description": "Sets breakpoint on particular native event.",
                "hidden": true
            },
            {
                "name": "removeInstrumentationBreakpoint",
                "parameters": [
                    { "name": "eventName", "type": "string", "description": "Instrumentation name to stop on." }
                ],
                "description": "Removes breakpoint on particular native event.",
                "hidden": true
            },
            {
                "name": "setXHRBreakpoint",
                "parameters": [
                    { "name": "url", "type": "string", "description": "Resource URL substring. All XHRs having this substring in the URL will get stopped upon." }
                ],
                "description": "Sets breakpoint on XMLHttpRequest."
            },
            {
                "name": "removeXHRBreakpoint",
                "parameters": [
                    { "name": "url", "type": "string", "description": "Resource URL substring." }
                ],
                "description": "Removes breakpoint from XMLHttpRequest."
            }
        ]
    },
    {
        "domain": "Profiler",
        "hidden": true,
        "types": [
            {
                "id": "ProfileHeader",
                "type": "object",
                "description": "Profile header.",
                "properties": [
                    { "name": "title", "type": "string", "description": "Profile title." },
                    { "name": "uid", "type": "integer", "description": "Unique identifier of the profile." }
                ]
            },
            {
                "id": "CPUProfileNode",
                "type": "object",
                "description": "CPU Profile node. Holds callsite information, execution statistics and child nodes.",
                "properties": [
                    { "name": "functionName", "type": "string", "description": "Function name." },
                    { "name": "scriptId", "$ref": "Debugger.ScriptId", "description": "Script identifier." },
                    { "name": "url", "type": "string", "description": "URL." },
                    { "name": "lineNumber", "type": "integer", "description": "Line number." },
                    { "name": "hitCount", "type": "integer", "description": "Number of samples where this node was on top of the call stack." },
                    { "name": "callUID", "type": "number", "description": "Call UID." },
                    { "name": "children", "type": "array", "items": { "$ref": "CPUProfileNode" }, "description": "Child nodes." },
                    { "name": "deoptReason", "type": "string", "description": "The reason of being not optimized. The function may be deoptimized or marked as don't optimize."},
                    { "name": "id", "optional": true, "type": "integer", "description": "Unique id of the node." }
                ]
            },
            {
                "id": "CPUProfile",
                "type": "object",
                "description": "Profile.",
                "properties": [
                    { "name": "head", "$ref": "CPUProfileNode" },
                    { "name": "startTime", "type": "number", "description": "Profiling start time in seconds." },
                    { "name": "endTime", "type": "number", "description": "Profiling end time in seconds." },
                    { "name": "samples", "optional": true, "type": "array", "items": { "type": "integer" }, "description": "Ids of samples top nodes." }
                ]
            },
            {
                "id": "HeapSnapshotObjectId",
                "type": "string",
                "description": "Heap snashot object id."
            }
        ],
        "commands": [
            {
                "name": "enable"
            },
            {
                "name": "disable"
            },
            {
                "name": "start"
            },
            {
                "name": "stop",
                "returns": [
                    { "name": "header", "$ref": "ProfileHeader", "description": "The header of the recorded profile."}
                ]
            },
            {
                "name": "getProfileHeaders",
                "returns": [
                    { "name": "headers", "type": "array", "items": { "$ref": "ProfileHeader"} }
                ]
            },
            {
                "name": "getCPUProfile",
                "parameters": [
                    { "name": "uid", "type": "integer" }
                ],
                "returns": [
                    { "name": "profile", "$ref": "CPUProfile" }
                ]
            },
            {
                "name": "removeProfile",
                "parameters": [
                    { "name": "type", "type": "string" },
                    { "name": "uid", "type": "integer" }
                ]
            },
            {
                "name": "clearProfiles"
            }
        ],
        "events": [
            {
                "name": "addProfileHeader",
                "parameters": [
                    { "name": "header", "$ref": "ProfileHeader" }
                ]
            },
            {
                "name": "setRecordingProfile",
                "parameters": [
                    { "name": "isProfiling", "type": "boolean" }
                ]
            },
            {
                "name": "resetProfiles"
            }
        ]
    },
    {
        "domain": "HeapProfiler",
        "hidden": true,
        "types": [
            {
                "id": "ProfileHeader",
                "type": "object",
                "description": "Profile header.",
                "properties": [
                    { "name": "title", "type": "string", "description": "Profile title." },
                    { "name": "uid", "type": "integer", "description": "Unique identifier of the profile." },
                    { "name": "maxJSObjectId", "type": "integer", "optional": true, "description": "Last seen JS object Id." }
                ]
            },
            {
                "id": "HeapSnapshotObjectId",
                "type": "string",
                "description": "Heap snashot object id."
            }
        ],
        "commands": [
            {
                "name": "getProfileHeaders",
                "returns": [
                    { "name": "headers", "type": "array", "items": { "$ref": "ProfileHeader"} }
                ]
            },
            {
                "name": "startTrackingHeapObjects"
            },
            {
                "name": "stopTrackingHeapObjects"
            },
            {
                "name": "getHeapSnapshot",
                "parameters": [
                    { "name": "uid", "type": "integer" }
                ]
            },
            {
                "name": "removeProfile",
                "parameters": [
                    { "name": "uid", "type": "integer" }
                ]
            },
            {
                "name": "clearProfiles"
            },
            {
                "name": "takeHeapSnapshot",
                "parameters": [
                    { "name": "reportProgress", "type": "boolean", "optional": true, "description": "If true 'reportHeapSnapshotProgress' events will be generated while snapshot is being taken." }
                ]
            },
            {
                "name": "collectGarbage"
            },
            {
                "name": "getObjectByHeapObjectId",
                "parameters": [
                    { "name": "objectId", "$ref": "HeapSnapshotObjectId" },
                    { "name": "objectGroup", "type": "string", "optional": true, "description": "Symbolic group name that can be used to release multiple objects." }
                ],
                "returns": [
                    { "name": "result", "$ref": "Runtime.RemoteObject", "description": "Evaluation result." }
                ]
            },
            {
                "name": "getHeapObjectId",
                "parameters": [
                    { "name": "objectId", "$ref": "Runtime.RemoteObjectId", "description": "Identifier of the object to get heap object id for." }
                ],
                "returns": [
                    { "name": "heapSnapshotObjectId", "$ref": "HeapSnapshotObjectId", "description": "Id of the heap snapshot object corresponding to the passed remote object id." }
                ]
            }
        ],
        "events": [
            {
                "name": "addProfileHeader",
                "parameters": [
                    { "name": "header", "$ref": "ProfileHeader" }
                ]
            },
            {
                "name": "addHeapSnapshotChunk",
                "parameters": [
                    { "name": "uid", "type": "integer" },
                    { "name": "chunk", "type": "string" }
                ]
            },
            {
                "name": "finishHeapSnapshot",
                "parameters": [
                    { "name": "uid", "type": "integer" }
                ]
            },
            {
                "name": "resetProfiles"
            },
            {
                "name": "reportHeapSnapshotProgress",
                "parameters": [
                    { "name": "done", "type": "integer" },
                    { "name": "total", "type": "integer" }
                ]
            },
            {
                "name": "lastSeenObjectId",
                "description": "If heap objects tracking has been started then backend regulary sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.",
                "parameters": [
                    { "name": "lastSeenObjectId", "type": "integer" },
                    { "name": "timestamp", "type": "number" }
                ]
            },
            {
                "name": "heapStatsUpdate",
                "description": "If heap objects tracking has been started then backend may send update for one or more fragments",
                "parameters": [
                    { "name": "statsUpdate", "type": "array", "items": { "type": "integer" }, "description": "An array of triplets. Each triplet describes a fragment. The first integer is the fragment index, the second integer is a total count of objects for the fragment, the third integer is a total size of the objects for the fragment."}
                ]
            }
        ]
    },
    {
        "domain": "Worker",
        "hidden": true,
        "types": [],
        "commands": [
            {
                "name": "enable"
            },
            {
                "name": "disable"
            },
            {
                "name": "sendMessageToWorker",
                "parameters": [
                    { "name": "workerId", "type": "integer" },
                    { "name": "message", "type": "object" }
                ]
            },
            {
                "name": "canInspectWorkers",
                "description": "Tells whether browser supports workers inspection.",
                "returns": [
                    { "name": "result", "type": "boolean", "description": "True if browser has workers support." }
                ]
            },
            {
                "name": "connectToWorker",
                "parameters": [
                    { "name": "workerId", "type": "integer" }
                ]
            },
            {
                "name": "disconnectFromWorker",
                "parameters": [
                    { "name": "workerId", "type": "integer" }
                ]
            },
            {
                "name": "setAutoconnectToWorkers",
                "parameters": [
                    { "name": "value", "type": "boolean" }
                ]
            }
        ],
        "events": [
            {
                "name": "workerCreated",
                "parameters": [
                    { "name": "workerId", "type": "integer" },
                    { "name": "url", "type": "string" },
                    { "name": "inspectorConnected", "type": "boolean" }
                ]
            },
            {
                "name": "workerTerminated",
                "parameters": [
                    { "name": "workerId", "type": "integer" }
                ]
            },
            {
                "name": "dispatchMessageFromWorker",
                "parameters": [
                    { "name": "workerId", "type": "integer" },
                    { "name": "message", "type": "object" }
                ]
            },
            {
                "name": "disconnectedFromWorker"
            }
        ]
    },
    {
        "domain": "Canvas",
        "hidden": true,
        "types": [
            {
                "id": "ResourceId",
                "type": "string",
                "description": "Unique resource identifier."
            },
            {
                "id": "ResourceStateDescriptor",
                "type": "object",
                "description": "Resource state descriptor.",
                "properties": [
                    { "name": "name", "type": "string", "description": "State name." },
                    { "name": "enumValueForName", "type": "string", "optional": true, "description": "String representation of the enum value, if <code>name</code> stands for an enum." },
                    { "name": "value", "$ref": "CallArgument", "optional": true, "description": "The value associated with the particular state." },
                    { "name": "values", "type": "array", "items": { "$ref": "ResourceStateDescriptor" }, "optional": true, "description": "Array of values associated with the particular state. Either <code>value</code> or <code>values</code> will be specified." },
                    { "name": "isArray", "type": "boolean", "optional": true, "description": "True iff the given <code>values</code> items stand for an array rather than a list of grouped states." }
                ]
            },
            {
                "id": "ResourceState",
                "type": "object",
                "description": "Resource state.",
                "properties": [
                    { "name": "id", "$ref": "ResourceId" },
                    { "name": "traceLogId", "$ref": "TraceLogId" },
                    { "name": "descriptors", "type": "array", "items": { "$ref": "ResourceStateDescriptor" }, "optional": true, "description": "Describes current <code>Resource</code> state." },
                    { "name": "imageURL", "type": "string", "optional": true, "description": "Screenshot image data URL." }
                ]
            },
            {
                "id": "CallArgument",
                "type": "object",
                "properties": [
                    { "name": "description", "type": "string", "description": "String representation of the object." },
                    { "name": "enumName", "type": "string", "optional": true, "description": "Enum name, if any, that stands for the value (for example, a WebGL enum name)." },
                    { "name": "resourceId", "$ref": "ResourceId", "optional": true, "description": "Resource identifier. Specified for <code>Resource</code> objects only." },
                    { "name": "type", "type": "string", "optional": true, "enum": ["object", "function", "undefined", "string", "number", "boolean"], "description": "Object type. Specified for non <code>Resource</code> objects only." },
                    { "name": "subtype", "type": "string", "optional": true, "enum": ["array", "null", "node", "regexp", "date"], "description": "Object subtype hint. Specified for <code>object</code> type values only." },
                    { "name": "remoteObject", "$ref": "Runtime.RemoteObject", "optional": true, "description": "The <code>RemoteObject</code>, if requested." }
                ]
            },
            {
                "id": "Call",
                "type": "object",
                "properties": [
                    { "name": "contextId", "$ref": "ResourceId" },
                    { "name": "functionName", "type": "string", "optional": true },
                    { "name": "arguments", "type": "array", "items": { "$ref": "CallArgument" }, "optional": true },
                    { "name": "result", "$ref": "CallArgument", "optional": true },
                    { "name": "isDrawingCall", "type": "boolean", "optional": true },
                    { "name": "isFrameEndCall", "type": "boolean", "optional": true },
                    { "name": "property", "type": "string", "optional": true },
                    { "name": "value", "$ref": "CallArgument", "optional": true },
                    { "name": "sourceURL", "type": "string", "optional": true },
                    { "name": "lineNumber", "type": "integer", "optional": true },
                    { "name": "columnNumber", "type": "integer", "optional": true }
                ]
            },
            {
                "id": "TraceLogId",
                "type": "string",
                "description": "Unique trace log identifier."
            },
            {
                "id": "TraceLog",
                "type": "object",
                "properties": [
                    { "name": "id", "$ref": "TraceLogId" },
                    { "name": "calls", "type": "array", "items": { "$ref": "Call" } },
                    { "name": "contexts", "type": "array", "items": { "$ref": "CallArgument" } },
                    { "name": "startOffset", "type": "integer" },
                    { "name": "alive", "type": "boolean" },
                    { "name": "totalAvailableCalls", "type": "number" }
                ]
            }
        ],
        "commands": [
            {
                "name": "enable",
                "description": "Enables Canvas inspection."
            },
            {
                "name": "disable",
                "description": "Disables Canvas inspection."
            },
            {
                "name": "dropTraceLog",
                "parameters": [
                    { "name": "traceLogId", "$ref": "TraceLogId" }
                ]
            },
            {
                "name": "hasUninstrumentedCanvases",
                "returns": [
                    { "name": "result", "type": "boolean" }
                ],
                "description": "Checks if there is any uninstrumented canvas in the inspected page."
            },
            {
                "name": "captureFrame",
                "parameters": [
                    { "name": "frameId", "$ref": "Page.FrameId", "optional": true, "description": "Identifier of the frame containing document whose canvases are to be captured. If omitted, main frame is assumed." }
                ],
                "returns": [
                    { "name": "traceLogId", "$ref": "TraceLogId", "description": "Identifier of the trace log containing captured canvas calls." }
                ],
                "description": "Starts (or continues) a canvas frame capturing which will be stopped automatically after the next frame is prepared."
            },
            {
                "name": "startCapturing",
                "parameters": [
                    { "name": "frameId", "$ref": "Page.FrameId", "optional": true, "description": "Identifier of the frame containing document whose canvases are to be captured. If omitted, main frame is assumed." }
                ],
                "returns": [
                    { "name": "traceLogId", "$ref": "TraceLogId", "description": "Identifier of the trace log containing captured canvas calls." }
                ],
                "description": "Starts (or continues) consecutive canvas frames capturing. The capturing is stopped by the corresponding stopCapturing command."
            },
            {
                "name": "stopCapturing",
                "parameters": [
                    { "name": "traceLogId", "$ref": "TraceLogId" }
                ]
            },
            {
                "name": "getTraceLog",
                "parameters": [
                    { "name": "traceLogId", "$ref": "TraceLogId" },
                    { "name": "startOffset", "type": "integer", "optional": true },
                    { "name": "maxLength", "type": "integer", "optional": true }
                ],
                "returns": [
                    { "name": "traceLog", "$ref": "TraceLog" }
                ]
            },
            {
                "name": "replayTraceLog",
                "parameters": [
                    { "name": "traceLogId", "$ref": "TraceLogId" },
                    { "name": "stepNo", "type": "integer", "description": "Last call index in the trace log to replay (zero based)." }
                ],
                "returns": [
                    { "name": "resourceState", "$ref": "ResourceState" },
                    { "name": "replayTime", "type": "number", "description": "Replay time (in milliseconds)." }
                ]
            },
            {
                "name": "getResourceState",
                "parameters": [
                    { "name": "traceLogId", "$ref": "TraceLogId" },
                    { "name": "resourceId", "$ref": "ResourceId" }
                ],
                "returns": [
                    { "name": "resourceState", "$ref": "ResourceState" }
                ]
            },
            {
                "name": "evaluateTraceLogCallArgument",
                "parameters": [
                    { "name": "traceLogId", "$ref": "TraceLogId" },
                    { "name": "callIndex", "type": "integer", "description": "Index of the call to evaluate on (zero based)." },
                    { "name": "argumentIndex", "type": "integer", "description": "Index of the argument to evaluate (zero based). Provide <code>-1</code> to evaluate call result." },
                    { "name": "objectGroup", "type": "string", "optional": true, "description": "String object group name to put result into (allows rapid releasing resulting object handles using <code>Runtime.releaseObjectGroup</code>)." }
                ],
                "returns": [
                    { "name": "result", "$ref": "Runtime.RemoteObject", "optional": true, "description": "Object wrapper for the evaluation result." },
                    { "name": "resourceState", "$ref": "ResourceState", "optional": true, "description": "State of the <code>Resource</code> object." }
                ],
                "description": "Evaluates a given trace call argument or its result."
            }
        ],
        "events": [
            {
                "name": "contextCreated",
                "parameters": [
                    { "name": "frameId", "$ref": "Page.FrameId", "description": "Identifier of the frame containing a canvas with a context." }
                ],
                "description": "Fired when a canvas context has been created in the given frame. The context may not be instrumented (see hasUninstrumentedCanvases command)."
            },
            {
                "name": "traceLogsRemoved",
                "parameters": [
                    { "name": "frameId", "$ref": "Page.FrameId", "optional": true, "description": "If given, trace logs from the given frame were removed." },
                    { "name": "traceLogId", "$ref": "TraceLogId", "optional": true, "description": "If given, trace log with the given ID was removed." }
                ],
                "description": "Fired when a set of trace logs were removed from the backend. If no parameters are given, all trace logs were removed."
            }
        ]
    },
    {
        "domain": "Input",
        "types": [
            {
                "id": "TouchPoint",
                "type": "object",
                "hidden": true,
                "properties": [
                    { "name": "state", "type": "string", "enum": ["touchPressed", "touchReleased", "touchMoved", "touchStationary", "touchCancelled"], "description": "State of the touch point." },
                    { "name": "x", "type": "integer", "description": "X coordinate of the event relative to the main frame's viewport."},
                    { "name": "y", "type": "integer", "description": "Y coordinate of the event relative to the main frame's viewport. 0 refers to the top of the viewport and Y increases as it proceeds towards the bottom of the viewport."},
                    { "name": "radiusX", "type": "integer", "optional": true, "description": "X radius of the touch area (default: 1)."},
                    { "name": "radiusY", "type": "integer", "optional": true, "description": "Y radius of the touch area (default: 1)."},
                    { "name": "rotationAngle", "type": "number", "optional": true, "description": "Rotation angle (default: 0.0)."},
                    { "name": "force", "type": "number", "optional": true, "description": "Force (default: 1.0)."},
                    { "name": "id", "type": "number", "optional": true, "description": "Identifier used to track touch sources between events, must be unique within an event."}
                ]
            }
        ],
        "commands": [
            {
                "name": "dispatchKeyEvent",
                "parameters": [
                    { "name": "type", "type": "string", "enum": ["keyDown", "keyUp", "rawKeyDown", "char"], "description": "Type of the key event." },
                    { "name": "modifiers", "type": "integer", "optional": true, "description": "Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8 (default: 0)." },
                    { "name": "timestamp", "type": "number", "optional": true, "description": "Time at which the event occurred. Measured in UTC time in seconds since January 1, 1970 (default: current time)." },
                    { "name": "text", "type": "string", "optional": true, "description": "Text as generated by processing a virtual key code with a keyboard layout. Not needed for for <code>keyUp</code> and <code>rawKeyDown</code> events (default: \"\")" },
                    { "name": "unmodifiedText", "type": "string", "optional": true, "description": "Text that would have been generated by the keyboard if no modifiers were pressed (except for shift). Useful for shortcut (accelerator) key handling (default: \"\")." },
                    { "name": "keyIdentifier", "type": "string", "optional": true, "description": "Unique key identifier (e.g., 'U+0041') (default: \"\")." },
                    { "name": "windowsVirtualKeyCode", "type": "integer", "optional": true, "description": "Windows virtual key code (default: 0)." },
                    { "name": "nativeVirtualKeyCode", "type": "integer", "optional": true, "description": "Native virtual key code (default: 0)." },
                    { "name": "autoRepeat", "type": "boolean", "optional": true, "description": "Whether the event was generated from auto repeat (default: false)." },
                    { "name": "isKeypad", "type": "boolean", "optional": true, "description": "Whether the event was generated from the keypad (default: false)." },
                    { "name": "isSystemKey", "type": "boolean", "optional": true, "description": "Whether the event was a system key event (default: false)." }
                ],
                "description": "Dispatches a key event to the page."
            },
            {
                "name": "dispatchMouseEvent",
                "parameters": [
                    { "name": "type", "type": "string", "enum": ["mousePressed", "mouseReleased", "mouseMoved"], "description": "Type of the mouse event." },
                    { "name": "x", "type": "integer", "description": "X coordinate of the event relative to the main frame's viewport."},
                    { "name": "y", "type": "integer", "description": "Y coordinate of the event relative to the main frame's viewport. 0 refers to the top of the viewport and Y increases as it proceeds towards the bottom of the viewport."},
                    { "name": "modifiers", "type": "integer", "optional": true, "description": "Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8 (default: 0)." },
                    { "name": "timestamp", "type": "number", "optional": true, "description": "Time at which the event occurred. Measured in UTC time in seconds since January 1, 1970 (default: current time)." },
                    { "name": "button", "type": "string", "enum": ["none", "left", "middle", "right"], "optional": true, "description": "Mouse button (default: \"none\")." },
                    { "name": "clickCount", "type": "integer", "optional": true, "description": "Number of times the mouse button was clicked (default: 0)." },
                    { "name": "deviceSpace", "type": "boolean", "optional": true, "hidden": true, "description": "If true, x and y are given in dip wrt current viewport." }
                ],
                "description": "Dispatches a mouse event to the page."
            },
            {
                "name": "dispatchTouchEvent",
                "hidden": true,
                "parameters": [
                    { "name": "type", "type": "string", "enum": ["touchStart", "touchEnd", "touchMove"], "description": "Type of the touch event." },
                    { "name": "touchPoints", "type": "array", "items": { "$ref": "TouchPoint" }, "description": "Touch points." },
                    { "name": "modifiers", "type": "integer", "optional": true, "description": "Bit field representing pressed modifier keys. Alt=1, Ctrl=2, Meta/Command=4, Shift=8 (default: 0)." },
                    { "name": "timestamp", "type": "number", "optional": true, "description": "Time at which the event occurred. Measured in UTC time in seconds since January 1, 1970 (default: current time)." }
                ],
                "description": "Dispatches a touch event to the page."
            },
            {
                "name": "dispatchGestureEvent",
                "hidden": true,
                "parameters": [
                    { "name": "type", "type": "string", "enum": ["scrollBegin", "scrollEnd", "scrollUpdate", "tapDown", "tap", "pinchBegin", "pinchEnd", "pinchUpdate"], "description": "Type of the gesture event." },
                    { "name": "x", "type": "integer", "description": "X coordinate relative to the screen's viewport."},
                    { "name": "y", "type": "integer", "description": "Y coordinate relative to the screen's viewport."},
                    { "name": "timestamp", "type": "number", "optional": true, "description": "Time at which the event occurred. Measured in UTC time in seconds since January 1, 1970 (default: current time)." },
                    { "name": "deltaX", "type": "integer", "optional": true, "description": "Delta X where apllies."},
                    { "name": "deltaY", "type": "integer", "optional": true, "description": "Delta Y where apllies."},
                    { "name": "pinchScale", "type": "number", "optional": true, "description": "Pinch scale." }
                ],
                "description": "Dispatches a gesture event to the page."
            }
        ],
        "events": []
    },
    {
        "domain": "LayerTree",
        "hidden": true,
        "types": [
            {
                "id": "LayerId",
                "type": "string",
                "description": "Unique RenderLayer identifier."
            },
            {
                "id": "Layer",
                "type": "object",
                "description": "Information about a compositing layer.",
                "properties": [
                    { "name": "layerId", "$ref": "LayerId", "description": "The unique id for this layer." },
                    { "name": "parentLayerId", "$ref": "LayerId", "optional": true, "description": "The id of parent (not present for root)." },
                    { "name": "nodeId", "$ref": "DOM.NodeId", "optional": true, "description": "The id for the node associated with this layer." },
                    { "name": "offsetX", "type": "number", "description": "Offset from parent layer, X coordinate." },
                    { "name": "offsetY", "type": "number", "description": "Offset from parent layer, X coordinate." },
                    { "name": "width", "type": "number", "description": "Layer width." },
                    { "name": "height", "type": "number", "description": "Layer height." },
                    { "name": "transform", "type": "array", "items": { "type": "number" }, "minItems": 16, "maxItems": 16, "optional": true, "description": "Transformation matrix for layer, default is identity matrix" },
                    { "name": "anchorX", "type": "number", "optional": true, "description": "Transform anchor point X, absent if no transform specified" },
                    { "name": "anchorY", "type": "number", "optional": true, "description": "Transform anchor point Y, absent if no transform specified" },
                    { "name": "anchorZ", "type": "number", "optional": true, "description": "Transform anchor point Z, absent if no transform specified" },
                    { "name": "paintCount", "type": "integer", "description": "Indicates how many time this layer has painted." },
                    { "name": "invisible", "type": "boolean", "optional": true, "description": "Set if layer is not visible." }
                ]
            }
        ],
        "commands": [
            {
                "name": "enable",
                "description": "Enables compositing tree inspection."
            },
            {
                "name": "disable",
                "description": "Disables compositing tree inspection."
            },
            {
                "name": "getLayers",
                "parameters": [
                    { "name": "nodeId", "optional": true, "$ref": "DOM.NodeId", "description": "Root of the subtree for which we want to gather layers (return entire tree if not specified)" }
                ],
                "description": "Returns the layer tree structure of the current page.",
                "returns": [
                    { "name": "layers", "type": "array", "items": { "$ref": "Layer" }, "description": "Child layers." }
                ]
            },
            {
                "name": "compositingReasons",
                "parameters": [
                    { "name": "layerId", "$ref": "LayerId", "description": "The id of the layer for which we want to get the reasons it was composited." }
                ],
                "description": "Provides the reasons why the given layer was composited.",
                "returns": [
                    { "name": "compositingReasons", "type": "array", "items": { "type": "string" }, "description": "A list of strings specifying reasons for the given layer to become composited." }
                ]
            }
        ],
        "events": [
            {
                "name": "layerTreeDidChange"
            }
        ]
    },
    {
        "domain": "Tracing",
        "hidden": true,
        "commands": [
            {
                "name": "start",
                "description": "Strart trace events collection.",
                "parameters": [
                    { "name": "categories", "type": "string", "description": "Category/tag filter" }
                ]
            },
            {
                "name": "end",
                "description": "Stop trace events collection."
            }
        ],
        "events": [
            {
                "name": "dataCollected",
                "parameters": [
                    { "name": "value", "type": "array", "items": { "type": "object" } }
                ]
            },
            {
                "name": "tracingComplete"
            }
        ]
    }]
}