v8/include/js_protocol.pdl

# Copyright 2017 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

version
  major 1
  minor 3

# This domain is deprecated - use Runtime or Log instead.
deprecated domain Console
  depends on Runtime

  # Console message.
  type ConsoleMessage extends object
    properties
      # Message source.
      enum source
        xml
        javascript
        network
        console-api
        storage
        appcache
        rendering
        security
        other
        deprecation
        worker
      # Message severity.
      enum level
        log
        warning
        error
        debug
        info
      # Message text.
      string text
      # URL of the message origin.
      optional string url
      # Line number in the resource that generated this message (1-based).
      optional integer line
      # Column number in the resource that generated this message (1-based).
      optional integer column

  # Does nothing.
  command clearMessages

  # Disables console domain, prevents further console messages from being reported to the client.
  command disable

  # Enables console domain, sends the messages collected so far to the client by means of the
  # `messageAdded` notification.
  command enable

  # Issued when new console message is added.
  event messageAdded
    parameters
      # Console message that has been added.
      ConsoleMessage message

# Debugger domain exposes JavaScript debugging capabilities. It allows setting and removing
# breakpoints, stepping through execution, exploring stack traces, etc.
domain Debugger
  depends on Runtime

  # Breakpoint identifier.
  type BreakpointId extends string

  # Call frame identifier.
  type CallFrameId extends string

  # Location in the source code.
  type Location extends object
    properties
      # Script identifier as reported in the `Debugger.scriptParsed`.
      Runtime.ScriptId scriptId
      # Line number in the script (0-based).
      integer lineNumber
      # Column number in the script (0-based).
      optional integer columnNumber

  # Location in the source code.
  experimental type ScriptPosition extends object
    properties
      integer lineNumber
      integer columnNumber

  # Location range within one script.
  experimental type LocationRange extends object
    properties
      Runtime.ScriptId scriptId
      ScriptPosition start
      ScriptPosition end

  # JavaScript call frame. Array of call frames form the call stack.
  type CallFrame extends object
    properties
      # Call frame identifier. This identifier is only valid while the virtual machine is paused.
      CallFrameId callFrameId
      # Name of the JavaScript function called on this call frame.
      string functionName
      # Location in the source code.
      optional Location functionLocation
      # Location in the source code.
      Location location
      # JavaScript script name or url.
      string url
      # Scope chain for this call frame.
      array of Scope scopeChain
      # `this` object for this call frame.
      Runtime.RemoteObject this
      # The value being returned, if the function is at return point.
      optional Runtime.RemoteObject returnValue

  # Scope description.
  type Scope extends object
    properties
      # Scope type.
      enum type
        global
        local
        with
        closure
        catch
        block
        script
        eval
        module
        wasm-expression-stack
      # Object representing the scope. For `global` and `with` scopes it represents the actual
      # object; for the rest of the scopes, it is artificial transient object enumerating scope
      # variables as its properties.
      Runtime.RemoteObject object
      optional string name
      # Location in the source code where scope starts
      optional Location startLocation
      # Location in the source code where scope ends
      optional Location endLocation

  # Search match for resource.
  type SearchMatch extends object
    properties
      # Line number in resource content.
      number lineNumber
      # Line with match content.
      string lineContent

  type BreakLocation extends object
    properties
      # Script identifier as reported in the `Debugger.scriptParsed`.
      Runtime.ScriptId scriptId
      # Line number in the script (0-based).
      integer lineNumber
      # Column number in the script (0-based).
      optional integer columnNumber
      optional enum type
        debuggerStatement
        call
        return

  # Continues execution until specific location is reached.
  command continueToLocation
    parameters
      # Location to continue to.
      Location location
      optional enum targetCallFrames
        any
        current

  # Disables debugger for given page.
  command disable

  # Enables debugger for the given page. Clients should not assume that the debugging has been
  # enabled until the result for this command is received.
  command enable
    parameters
      # The maximum size in bytes of collected scripts (not referenced by other heap objects)
      # the debugger can hold. Puts no limit if paramter is omitted.
      experimental optional number maxScriptsCacheSize
    returns
      # Unique identifier of the debugger.
      experimental Runtime.UniqueDebuggerId debuggerId

  # Evaluates expression on a given call frame.
  command evaluateOnCallFrame
    parameters
      # Call frame identifier to evaluate on.
      CallFrameId callFrameId
      # Expression to evaluate.
      string expression
      # String object group name to put result into (allows rapid releasing resulting object handles
      # using `releaseObjectGroup`).
      optional string objectGroup
      # Specifies whether command line API should be available to the evaluated expression, defaults
      # to false.
      optional boolean includeCommandLineAPI
      # In silent mode exceptions thrown during evaluation are not reported and do not pause
      # execution. Overrides `setPauseOnException` state.
      optional boolean silent
      # Whether the result is expected to be a JSON object that should be sent by value.
      optional boolean returnByValue
      # Whether preview should be generated for the result.
      experimental optional boolean generatePreview
      # Whether to throw an exception if side effect cannot be ruled out during evaluation.
      optional boolean throwOnSideEffect
      # Terminate execution after timing out (number of milliseconds).
      experimental optional Runtime.TimeDelta timeout
    returns
      # Object wrapper for the evaluation result.
      Runtime.RemoteObject result
      # Exception details.
      optional Runtime.ExceptionDetails exceptionDetails

  # Returns possible locations for breakpoint. scriptId in start and end range locations should be
  # the same.
  command getPossibleBreakpoints
    parameters
      # Start of range to search possible breakpoint locations in.
      Location start
      # End of range to search possible breakpoint locations in (excluding). When not specified, end
      # of scripts is used as end of range.
      optional Location end
      # Only consider locations which are in the same (non-nested) function as start.
      optional boolean restrictToFunction
    returns
      # List of the possible breakpoint locations.
      array of BreakLocation locations

  # Returns source for the script with given id.
  command getScriptSource
    parameters
      # Id of the script to get source for.
      Runtime.ScriptId scriptId
    returns
      # Script source (empty in case of Wasm bytecode).
      string scriptSource
      # Wasm bytecode.
      optional binary bytecode

  # This command is deprecated. Use getScriptSource instead.
  deprecated command getWasmBytecode
    parameters
      # Id of the Wasm script to get source for.
      Runtime.ScriptId scriptId
    returns
      # Script source.
      binary bytecode

  # Returns stack trace with given `stackTraceId`.
  experimental command getStackTrace
    parameters
      Runtime.StackTraceId stackTraceId
    returns
      Runtime.StackTrace stackTrace

  # Stops on the next JavaScript statement.
  command pause

  experimental deprecated command pauseOnAsyncCall
    parameters
      # Debugger will pause when async call with given stack trace is started.
      Runtime.StackTraceId parentStackTraceId

  # Removes JavaScript breakpoint.
  command removeBreakpoint
    parameters
      BreakpointId breakpointId

  # Restarts particular call frame from the beginning.
  command restartFrame
    parameters
      # Call frame identifier to evaluate on.
      CallFrameId callFrameId
    returns
      # New stack trace.
      array of CallFrame callFrames
      # Async stack trace, if any.
      optional Runtime.StackTrace asyncStackTrace
      # Async stack trace, if any.
      experimental optional Runtime.StackTraceId asyncStackTraceId

  # Resumes JavaScript execution.
  command resume
    parameters
      # Set to true to terminate execution upon resuming execution. In contrast
      # to Runtime.terminateExecution, this will allows to execute further
      # JavaScript (i.e. via evaluation) until execution of the paused code
      # is actually resumed, at which point termination is triggered.
      # If execution is currently not paused, this parameter has no effect.
      optional boolean terminateOnResume

  # Searches for given string in script content.
  command searchInContent
    parameters
      # Id of the script to search in.
      Runtime.ScriptId scriptId
      # String to search for.
      string query
      # If true, search is case sensitive.
      optional boolean caseSensitive
      # If true, treats string parameter as regex.
      optional boolean isRegex
    returns
      # List of search matches.
      array of SearchMatch result

  # Enables or disables async call stacks tracking.
  command setAsyncCallStackDepth
    parameters
      # Maximum depth of async call stacks. Setting to `0` will effectively disable collecting async
      # call stacks (default).
      integer maxDepth

  # Replace previous blackbox patterns with passed ones. Forces backend to skip stepping/pausing in
  # scripts with url matching one of the patterns. VM will try to leave blackboxed script by
  # performing 'step in' several times, finally resorting to 'step out' if unsuccessful.
  experimental command setBlackboxPatterns
    parameters
      # Array of regexps that will be used to check script url for blackbox state.
      array of string patterns

  # Makes backend skip steps in the script in blackboxed ranges. VM will try leave blacklisted
  # scripts by performing 'step in' several times, finally resorting to 'step out' if unsuccessful.
  # Positions array contains positions where blackbox state is changed. First interval isn't
  # blackboxed. Array should be sorted.
  experimental command setBlackboxedRanges
    parameters
      # Id of the script.
      Runtime.ScriptId scriptId
      array of ScriptPosition positions

  # Sets JavaScript breakpoint at a given location.
  command setBreakpoint
    parameters
      # Location to set breakpoint in.
      Location location
      # Expression to use as a breakpoint condition. When specified, debugger will only stop on the
      # breakpoint if this expression evaluates to true.
      optional string condition
    returns
      # Id of the created breakpoint for further reference.
      BreakpointId breakpointId
      # Location this breakpoint resolved into.
      Location actualLocation

  # Sets instrumentation breakpoint.
  command setInstrumentationBreakpoint
    parameters
      # Instrumentation name.
      enum instrumentation
        beforeScriptExecution
        beforeScriptWithSourceMapExecution
    returns
      # Id of the created breakpoint for further reference.
      BreakpointId breakpointId

  # Sets JavaScript breakpoint at given location specified either by URL or URL regex. Once this
  # command is issued, all existing parsed scripts will have breakpoints resolved and returned in
  # `locations` property. Further matching script parsing will result in subsequent
  # `breakpointResolved` events issued. This logical breakpoint will survive page reloads.
  command setBreakpointByUrl
    parameters
      # Line number to set breakpoint at.
      integer lineNumber
      # URL of the resources to set breakpoint on.
      optional string url
      # Regex pattern for the URLs of the resources to set breakpoints on. Either `url` or
      # `urlRegex` must be specified.
      optional string urlRegex
      # Script hash of the resources to set breakpoint on.
      optional string scriptHash
      # Offset in the line to set breakpoint at.
      optional integer columnNumber
      # Expression to use as a breakpoint condition. When specified, debugger will only stop on the
      # breakpoint if this expression evaluates to true.
      optional string condition
    returns
      # Id of the created breakpoint for further reference.
      BreakpointId breakpointId
      # List of the locations this breakpoint resolved into upon addition.
      array of Location locations

  # Sets JavaScript breakpoint before each call to the given function.
  # If another function was created from the same source as a given one,
  # calling it will also trigger the breakpoint.
  experimental command setBreakpointOnFunctionCall
    parameters
      # Function object id.
      Runtime.RemoteObjectId objectId
      # Expression to use as a breakpoint condition. When specified, debugger will
      # stop on the breakpoint if this expression evaluates to true.
      optional string condition
    returns
      # Id of the created breakpoint for further reference.
      BreakpointId breakpointId

  # Activates / deactivates all breakpoints on the page.
  command setBreakpointsActive
    parameters
      # New value for breakpoints active state.
      boolean active

  # Defines pause on exceptions state. Can be set to stop on all exceptions, uncaught exceptions or
  # no exceptions. Initial pause on exceptions state is `none`.
  command setPauseOnExceptions
    parameters
      # Pause on exceptions mode.
      enum state
        none
        uncaught
        all

  # Changes return value in top frame. Available only at return break position.
  experimental command setReturnValue
    parameters
      # New return value.
      Runtime.CallArgument newValue

  # Edits JavaScript source live.
  command setScriptSource
    parameters
      # Id of the script to edit.
      Runtime.ScriptId scriptId
      # New content of the script.
      string scriptSource
      #  If true the change will not actually be applied. Dry run may be used to get result
      # description without actually modifying the code.
      optional boolean dryRun
    returns
      # New stack trace in case editing has happened while VM was stopped.
      optional array of CallFrame callFrames
      # Whether current call stack  was modified after applying the changes.
      optional boolean stackChanged
      # Async stack trace, if any.
      optional Runtime.StackTrace asyncStackTrace
      # Async stack trace, if any.
      experimental optional Runtime.StackTraceId asyncStackTraceId
      # Exception details if any.
      optional Runtime.ExceptionDetails exceptionDetails

  # Makes page not interrupt on any pauses (breakpoint, exception, dom exception etc).
  command setSkipAllPauses
    parameters
      # New value for skip pauses state.
      boolean skip

  # Changes value of variable in a callframe. Object-based scopes are not supported and must be
  # mutated manually.
  command setVariableValue
    parameters
      # 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.
      integer scopeNumber
      # Variable name.
      string variableName
      # New variable value.
      Runtime.CallArgument newValue
      # Id of callframe that holds variable.
      CallFrameId callFrameId

  # Steps into the function call.
  command stepInto
    parameters
      # Debugger will pause on the execution of the first async task which was scheduled
      # before next pause.
      experimental optional boolean breakOnAsyncCall
      # The skipList specifies location ranges that should be skipped on step into.
      experimental optional array of LocationRange skipList

  # Steps out of the function call.
  command stepOut

  # Steps over the statement.
  command stepOver
    parameters
      # The skipList specifies location ranges that should be skipped on step over.
      experimental optional array of LocationRange skipList

  # Fired when breakpoint is resolved to an actual script and location.
  event breakpointResolved
    parameters
      # Breakpoint unique identifier.
      BreakpointId breakpointId
      # Actual breakpoint location.
      Location location

  # Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
  event paused
    parameters
      # Call stack the virtual machine stopped on.
      array of CallFrame callFrames
      # Pause reason.
      enum reason
        ambiguous
        assert
        CSPViolation
        debugCommand
        DOM
        EventListener
        exception
        instrumentation
        OOM
        other
        promiseRejection
        XHR
      # Object containing break-specific auxiliary properties.
      optional object data
      # Hit breakpoints IDs
      optional array of string hitBreakpoints
      # Async stack trace, if any.
      optional Runtime.StackTrace asyncStackTrace
      # Async stack trace, if any.
      experimental optional Runtime.StackTraceId asyncStackTraceId
      # Never present, will be removed.
      experimental deprecated optional Runtime.StackTraceId asyncCallStackTraceId

  # Fired when the virtual machine resumed execution.
  event resumed

  # Enum of possible script languages.
  type ScriptLanguage extends string
    enum
      JavaScript
      WebAssembly

  # Debug symbols available for a wasm script.
  type DebugSymbols extends object
    properties
      # Type of the debug symbols.
      enum type
        None
        SourceMap
        EmbeddedDWARF
        ExternalDWARF
      # URL of the external symbol source.
      optional string externalURL

  # Fired when virtual machine fails to parse the script.
  event scriptFailedToParse
    parameters
      # Identifier of the script parsed.
      Runtime.ScriptId scriptId
      # URL or name of the script parsed (if any).
      string url
      # Line offset of the script within the resource with given URL (for script tags).
      integer startLine
      # Column offset of the script within the resource with given URL.
      integer startColumn
      # Last line of the script.
      integer endLine
      # Length of the last line of the script.
      integer endColumn
      # Specifies script creation context.
      Runtime.ExecutionContextId executionContextId
      # Content hash of the script.
      string hash
      # Embedder-specific auxiliary data.
      optional object executionContextAuxData
      # URL of source map associated with script (if any).
      optional string sourceMapURL
      # True, if this script has sourceURL.
      optional boolean hasSourceURL
      # True, if this script is ES6 module.
      optional boolean isModule
      # This script length.
      optional integer length
      # JavaScript top stack frame of where the script parsed event was triggered if available.
      experimental optional Runtime.StackTrace stackTrace
      # If the scriptLanguage is WebAssembly, the code section offset in the module.
      experimental optional integer codeOffset
      # The language of the script.
      experimental optional Debugger.ScriptLanguage scriptLanguage
      # The name the embedder supplied for this script.
      experimental optional string embedderName

  # Fired when virtual machine parses script. This event is also fired for all known and uncollected
  # scripts upon enabling debugger.
  event scriptParsed
    parameters
      # Identifier of the script parsed.
      Runtime.ScriptId scriptId
      # URL or name of the script parsed (if any).
      string url
      # Line offset of the script within the resource with given URL (for script tags).
      integer startLine
      # Column offset of the script within the resource with given URL.
      integer startColumn
      # Last line of the script.
      integer endLine
      # Length of the last line of the script.
      integer endColumn
      # Specifies script creation context.
      Runtime.ExecutionContextId executionContextId
      # Content hash of the script.
      string hash
      # Embedder-specific auxiliary data.
      optional object executionContextAuxData
      # True, if this script is generated as a result of the live edit operation.
      experimental optional boolean isLiveEdit
      # URL of source map associated with script (if any).
      optional string sourceMapURL
      # True, if this script has sourceURL.
      optional boolean hasSourceURL
      # True, if this script is ES6 module.
      optional boolean isModule
      # This script length.
      optional integer length
      # JavaScript top stack frame of where the script parsed event was triggered if available.
      experimental optional Runtime.StackTrace stackTrace
      # If the scriptLanguage is WebAssembly, the code section offset in the module.
      experimental optional integer codeOffset
      # The language of the script.
      experimental optional Debugger.ScriptLanguage scriptLanguage
      # If the scriptLanguage is WebASsembly, the source of debug symbols for the module.
      experimental optional Debugger.DebugSymbols debugSymbols
      # The name the embedder supplied for this script.
      experimental optional string embedderName

experimental domain HeapProfiler
  depends on Runtime

  # Heap snapshot object id.
  type HeapSnapshotObjectId extends string

  # Sampling Heap Profile node. Holds callsite information, allocation statistics and child nodes.
  type SamplingHeapProfileNode extends object
    properties
      # Function location.
      Runtime.CallFrame callFrame
      # Allocations size in bytes for the node excluding children.
      number selfSize
      # Node id. Ids are unique across all profiles collected between startSampling and stopSampling.
      integer id
      # Child nodes.
      array of SamplingHeapProfileNode children

  # A single sample from a sampling profile.
  type SamplingHeapProfileSample extends object
    properties
      # Allocation size in bytes attributed to the sample.
      number size
      # Id of the corresponding profile tree node.
      integer nodeId
      # Time-ordered sample ordinal number. It is unique across all profiles retrieved
      # between startSampling and stopSampling.
      number ordinal

  # Sampling profile.
  type SamplingHeapProfile extends object
    properties
      SamplingHeapProfileNode head
      array of SamplingHeapProfileSample samples

  # Enables console to refer to the node with given id via $x (see Command Line API for more details
  # $x functions).
  command addInspectedHeapObject
    parameters
      # Heap snapshot object id to be accessible by means of $x command line API.
      HeapSnapshotObjectId heapObjectId

  command collectGarbage

  command disable

  command enable

  command getHeapObjectId
    parameters
      # Identifier of the object to get heap object id for.
      Runtime.RemoteObjectId objectId
    returns
      # Id of the heap snapshot object corresponding to the passed remote object id.
      HeapSnapshotObjectId heapSnapshotObjectId

  command getObjectByHeapObjectId
    parameters
      HeapSnapshotObjectId objectId
      # Symbolic group name that can be used to release multiple objects.
      optional string objectGroup
    returns
      # Evaluation result.
      Runtime.RemoteObject result

  command getSamplingProfile
    returns
      # Return the sampling profile being collected.
      SamplingHeapProfile profile

  command startSampling
    parameters
      # Average sample interval in bytes. Poisson distribution is used for the intervals. The
      # default value is 32768 bytes.
      optional number samplingInterval

  command startTrackingHeapObjects
    parameters
      optional boolean trackAllocations

  command stopSampling
    returns
      # Recorded sampling heap profile.
      SamplingHeapProfile profile

  command stopTrackingHeapObjects
    parameters
      # If true 'reportHeapSnapshotProgress' events will be generated while snapshot is being taken
      # when the tracking is stopped.
      optional boolean reportProgress
      optional boolean treatGlobalObjectsAsRoots

  command takeHeapSnapshot
    parameters
      # If true 'reportHeapSnapshotProgress' events will be generated while snapshot is being taken.
      optional boolean reportProgress
      # If true, a raw snapshot without artifical roots will be generated
      optional boolean treatGlobalObjectsAsRoots

  event addHeapSnapshotChunk
    parameters
      string chunk

  # If heap objects tracking has been started then backend may send update for one or more fragments
  event heapStatsUpdate
    parameters
      # 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.
      array of integer statsUpdate

  # If heap objects tracking has been started then backend regularly 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.
  event lastSeenObjectId
    parameters
      integer lastSeenObjectId
      number timestamp

  event reportHeapSnapshotProgress
    parameters
      integer done
      integer total
      optional boolean finished

  event resetProfiles

domain Profiler
  depends on Runtime
  depends on Debugger

  # Profile node. Holds callsite information, execution statistics and child nodes.
  type ProfileNode extends object
    properties
      # Unique id of the node.
      integer id
      # Function location.
      Runtime.CallFrame callFrame
      # Number of samples where this node was on top of the call stack.
      optional integer hitCount
      # Child node ids.
      optional array of integer children
      # The reason of being not optimized. The function may be deoptimized or marked as don't
      # optimize.
      optional string deoptReason
      # An array of source position ticks.
      optional array of PositionTickInfo positionTicks

  # Profile.
  type Profile extends object
    properties
      # The list of profile nodes. First item is the root node.
      array of ProfileNode nodes
      # Profiling start timestamp in microseconds.
      number startTime
      # Profiling end timestamp in microseconds.
      number endTime
      # Ids of samples top nodes.
      optional array of integer samples
      # Time intervals between adjacent samples in microseconds. The first delta is relative to the
      # profile startTime.
      optional array of integer timeDeltas

  # Specifies a number of samples attributed to a certain source position.
  type PositionTickInfo extends object
    properties
      # Source line number (1-based).
      integer line
      # Number of samples attributed to the source line.
      integer ticks

  # Coverage data for a source range.
  type CoverageRange extends object
    properties
      # JavaScript script source offset for the range start.
      integer startOffset
      # JavaScript script source offset for the range end.
      integer endOffset
      # Collected execution count of the source range.
      integer count

  # Coverage data for a JavaScript function.
  type FunctionCoverage extends object
    properties
      # JavaScript function name.
      string functionName
      # Source ranges inside the function with coverage data.
      array of CoverageRange ranges
      # Whether coverage data for this function has block granularity.
      boolean isBlockCoverage

  # Coverage data for a JavaScript script.
  type ScriptCoverage extends object
    properties
      # JavaScript script id.
      Runtime.ScriptId scriptId
      # JavaScript script name or url.
      string url
      # Functions contained in the script that has coverage data.
      array of FunctionCoverage functions

  # Describes a type collected during runtime.
  experimental type TypeObject extends object
    properties
      # Name of a type collected with type profiling.
      string name

  # Source offset and types for a parameter or return value.
  experimental type TypeProfileEntry extends object
    properties
      # Source offset of the parameter or end of function for return values.
      integer offset
      # The types for this parameter or return value.
      array of TypeObject types

  # Type profile data collected during runtime for a JavaScript script.
  experimental type ScriptTypeProfile extends object
    properties
      # JavaScript script id.
      Runtime.ScriptId scriptId
      # JavaScript script name or url.
      string url
      # Type profile entries for parameters and return values of the functions in the script.
      array of TypeProfileEntry entries

  # Collected counter information.
  experimental type CounterInfo extends object
    properties
      # Counter name.
      string name
      # Counter value.
      integer value

  # Runtime call counter information.
  experimental type RuntimeCallCounterInfo extends object
    properties
      # Counter name.
      string name
      # Counter value.
      number value
      # Counter time in seconds.
      number time

  command disable

  command enable

  # Collect coverage data for the current isolate. The coverage data may be incomplete due to
  # garbage collection.
  command getBestEffortCoverage
    returns
      # Coverage data for the current isolate.
      array of ScriptCoverage result

  # Changes CPU profiler sampling interval. Must be called before CPU profiles recording started.
  command setSamplingInterval
    parameters
      # New sampling interval in microseconds.
      integer interval

  command start

  # Enable precise code coverage. Coverage data for JavaScript executed before enabling precise code
  # coverage may be incomplete. Enabling prevents running optimized code and resets execution
  # counters.
  command startPreciseCoverage
    parameters
      # Collect accurate call counts beyond simple 'covered' or 'not covered'.
      optional boolean callCount
      # Collect block-based coverage.
      optional boolean detailed
      # Allow the backend to send updates on its own initiative
      optional boolean allowTriggeredUpdates
    returns
      # Monotonically increasing time (in seconds) when the coverage update was taken in the backend.
      number timestamp

  # Enable type profile.
  experimental command startTypeProfile

  command stop
    returns
      # Recorded profile.
      Profile profile

  # Disable precise code coverage. Disabling releases unnecessary execution count records and allows
  # executing optimized code.
  command stopPreciseCoverage

  # Disable type profile. Disabling releases type profile data collected so far.
  experimental command stopTypeProfile

  # Collect coverage data for the current isolate, and resets execution counters. Precise code
  # coverage needs to have started.
  command takePreciseCoverage
    returns
      # Coverage data for the current isolate.
      array of ScriptCoverage result
      # Monotonically increasing time (in seconds) when the coverage update was taken in the backend.
      number timestamp

  # Collect type profile.
  experimental command takeTypeProfile
    returns
      # Type profile for all scripts since startTypeProfile() was turned on.
      array of ScriptTypeProfile result

  # Enable counters collection.
  experimental command enableCounters

  # Disable counters collection.
  experimental command disableCounters

  # Retrieve counters.
  experimental command getCounters
    returns
      # Collected counters information.
      array of CounterInfo result

  # Enable run time call stats collection.
  experimental command enableRuntimeCallStats

  # Disable run time call stats collection.
  experimental command disableRuntimeCallStats

  # Retrieve run time call stats.
  experimental command getRuntimeCallStats
    returns
      # Collected runtime call counter information.
      array of RuntimeCallCounterInfo result

  event consoleProfileFinished
    parameters
      string id
      # Location of console.profileEnd().
      Debugger.Location location
      Profile profile
      # Profile title passed as an argument to console.profile().
      optional string title

  # Sent when new profile recording is started using console.profile() call.
  event consoleProfileStarted
    parameters
      string id
      # Location of console.profile().
      Debugger.Location location
      # Profile title passed as an argument to console.profile().
      optional string title

  # Reports coverage delta since the last poll (either from an event like this, or from
  # `takePreciseCoverage` for the current isolate. May only be sent if precise code
  # coverage has been started. This event can be trigged by the embedder to, for example,
  # trigger collection of coverage data immediatelly at a certain point in time.
  experimental event preciseCoverageDeltaUpdate
    parameters
      # Monotonically increasing time (in seconds) when the coverage update was taken in the backend.
      number timestamp
      # Identifier for distinguishing coverage events.
      string occassion
      # Coverage data for the current isolate.
      array of ScriptCoverage result

# Runtime domain exposes JavaScript runtime by means of remote evaluation and mirror objects.
# Evaluation results are returned as mirror object that expose object type, string representation
# and unique identifier that can be used for further object reference. Original objects are
# maintained in memory unless they are either explicitly released or are released along with the
# other objects in their object group.
domain Runtime

  # Unique script identifier.
  type ScriptId extends string

  # Unique object identifier.
  type RemoteObjectId extends string

  # Primitive value which cannot be JSON-stringified. Includes values `-0`, `NaN`, `Infinity`,
  # `-Infinity`, and bigint literals.
  type UnserializableValue extends string

  # Mirror object referencing original JavaScript object.
  type RemoteObject extends object
    properties
      # Object type.
      enum type
        object
        function
        undefined
        string
        number
        boolean
        symbol
        bigint
      # Object subtype hint. Specified for `object` type values only.
      # NOTE: If you change anything here, make sure to also update
      # `subtype` in `ObjectPreview` and `PropertyPreview` below.
      optional enum subtype
        array
        null
        node
        regexp
        date
        map
        set
        weakmap
        weakset
        iterator
        generator
        error
        proxy
        promise
        typedarray
        arraybuffer
        dataview
        webassemblymemory
        wasmvalue
      # Object class (constructor) name. Specified for `object` type values only.
      optional string className
      # Remote object value in case of primitive values or JSON values (if it was requested).
      optional any value
      # Primitive value which can not be JSON-stringified does not have `value`, but gets this
      # property.
      optional UnserializableValue unserializableValue
      # String representation of the object.
      optional string description
      # Unique object identifier (for non-primitive values).
      optional RemoteObjectId objectId
      # Preview containing abbreviated property values. Specified for `object` type values only.
      experimental optional ObjectPreview preview
      experimental optional CustomPreview customPreview

  experimental type CustomPreview extends object
    properties
      # The JSON-stringified result of formatter.header(object, config) call.
      # It contains json ML array that represents RemoteObject.
      string header
      # If formatter returns true as a result of formatter.hasBody call then bodyGetterId will
      # contain RemoteObjectId for the function that returns result of formatter.body(object, config) call.
      # The result value is json ML array.
      optional RemoteObjectId bodyGetterId

  # Object containing abbreviated remote object value.
  experimental type ObjectPreview extends object
    properties
      # Object type.
      enum type
        object
        function
        undefined
        string
        number
        boolean
        symbol
        bigint
      # Object subtype hint. Specified for `object` type values only.
      optional enum subtype
        array
        null
        node
        regexp
        date
        map
        set
        weakmap
        weakset
        iterator
        generator
        error
        proxy
        promise
        typedarray
        arraybuffer
        dataview
        webassemblymemory
        wasmvalue
      # String representation of the object.
      optional string description
      # True iff some of the properties or entries of the original object did not fit.
      boolean overflow
      # List of the properties.
      array of PropertyPreview properties
      # List of the entries. Specified for `map` and `set` subtype values only.
      optional array of EntryPreview entries

  experimental type PropertyPreview extends object
    properties
      # Property name.
      string name
      # Object type. Accessor means that the property itself is an accessor property.
      enum type
        object
        function
        undefined
        string
        number
        boolean
        symbol
        accessor
        bigint
      # User-friendly property value string.
      optional string value
      # Nested value preview.
      optional ObjectPreview valuePreview
      # Object subtype hint. Specified for `object` type values only.
      optional enum subtype
        array
        null
        node
        regexp
        date
        map
        set
        weakmap
        weakset
        iterator
        generator
        error
        proxy
        promise
        typedarray
        arraybuffer
        dataview
        webassemblymemory
        wasmvalue

  experimental type EntryPreview extends object
    properties
      # Preview of the key. Specified for map-like collection entries.
      optional ObjectPreview key
      # Preview of the value.
      ObjectPreview value

  # Object property descriptor.
  type PropertyDescriptor extends object
    properties
      # Property name or symbol description.
      string name
      # The value associated with the property.
      optional RemoteObject value
      # True if the value associated with the property may be changed (data descriptors only).
      optional boolean writable
      # A function which serves as a getter for the property, or `undefined` if there is no getter
      # (accessor descriptors only).
      optional RemoteObject get
      # A function which serves as a setter for the property, or `undefined` if there is no setter
      # (accessor descriptors only).
      optional RemoteObject set
      # True if the type of this property descriptor may be changed and if the property may be
      # deleted from the corresponding object.
      boolean configurable
      # True if this property shows up during enumeration of the properties on the corresponding
      # object.
      boolean enumerable
      # True if the result was thrown during the evaluation.
      optional boolean wasThrown
      # True if the property is owned for the object.
      optional boolean isOwn
      # Property symbol object, if the property is of the `symbol` type.
      optional RemoteObject symbol

  # Object internal property descriptor. This property isn't normally visible in JavaScript code.
  type InternalPropertyDescriptor extends object
    properties
      # Conventional property name.
      string name
      # The value associated with the property.
      optional RemoteObject value

  # Object private field descriptor.
  experimental type PrivatePropertyDescriptor extends object
    properties
      # Private property name.
      string name
      # The value associated with the private property.
      optional RemoteObject value
      # A function which serves as a getter for the private property,
      # or `undefined` if there is no getter (accessor descriptors only).
      optional RemoteObject get
      # A function which serves as a setter for the private property,
      # or `undefined` if there is no setter (accessor descriptors only).
      optional RemoteObject set

  # Represents function call argument. Either remote object id `objectId`, primitive `value`,
  # unserializable primitive value or neither of (for undefined) them should be specified.
  type CallArgument extends object
    properties
      # Primitive value or serializable javascript object.
      optional any value
      # Primitive value which can not be JSON-stringified.
      optional UnserializableValue unserializableValue
      # Remote object handle.
      optional RemoteObjectId objectId

  # Id of an execution context.
  type ExecutionContextId extends integer

  # Description of an isolated world.
  type ExecutionContextDescription extends object
    properties
      # Unique id of the execution context. It can be used to specify in which execution context
      # script evaluation should be performed.
      ExecutionContextId id
      # Execution context origin.
      string origin
      # Human readable name describing given context.
      string name
      # A system-unique execution context identifier. Unlike the id, this is unique accross
      # multiple processes, so can be reliably used to identify specific context while backend
      # performs a cross-process navigation.
      experimental string uniqueId
      # Embedder-specific auxiliary data.
      optional object auxData

  # Detailed information about exception (or error) that was thrown during script compilation or
  # execution.
  type ExceptionDetails extends object
    properties
      # Exception id.
      integer exceptionId
      # Exception text, which should be used together with exception object when available.
      string text
      # Line number of the exception location (0-based).
      integer lineNumber
      # Column number of the exception location (0-based).
      integer columnNumber
      # Script ID of the exception location.
      optional ScriptId scriptId
      # URL of the exception location, to be used when the script was not reported.
      optional string url
      # JavaScript stack trace if available.
      optional StackTrace stackTrace
      # Exception object if available.
      optional RemoteObject exception
      # Identifier of the context where exception happened.
      optional ExecutionContextId executionContextId

  # Number of milliseconds since epoch.
  type Timestamp extends number

  # Number of milliseconds.
  type TimeDelta extends number

  # Stack entry for runtime errors and assertions.
  type CallFrame extends object
    properties
      # JavaScript function name.
      string functionName
      # JavaScript script id.
      ScriptId scriptId
      # JavaScript script name or url.
      string url
      # JavaScript script line number (0-based).
      integer lineNumber
      # JavaScript script column number (0-based).
      integer columnNumber

  # Call frames for assertions or error messages.
  type StackTrace extends object
    properties
      # String label of this stack trace. For async traces this may be a name of the function that
      # initiated the async call.
      optional string description
      # JavaScript function name.
      array of CallFrame callFrames
      # Asynchronous JavaScript stack trace that preceded this stack, if available.
      optional StackTrace parent
      # Asynchronous JavaScript stack trace that preceded this stack, if available.
      experimental optional StackTraceId parentId

  # Unique identifier of current debugger.
  experimental type UniqueDebuggerId extends string

  # If `debuggerId` is set stack trace comes from another debugger and can be resolved there. This
  # allows to track cross-debugger calls. See `Runtime.StackTrace` and `Debugger.paused` for usages.
  experimental type StackTraceId extends object
    properties
      string id
      optional UniqueDebuggerId debuggerId

  # Add handler to promise with given promise object id.
  command awaitPromise
    parameters
      # Identifier of the promise.
      RemoteObjectId promiseObjectId
      # Whether the result is expected to be a JSON object that should be sent by value.
      optional boolean returnByValue
      # Whether preview should be generated for the result.
      optional boolean generatePreview
    returns
      # Promise result. Will contain rejected value if promise was rejected.
      RemoteObject result
      # Exception details if stack strace is available.
      optional ExceptionDetails exceptionDetails

  # Calls function with given declaration on the given object. Object group of the result is
  # inherited from the target object.
  command callFunctionOn
    parameters
      # Declaration of the function to call.
      string functionDeclaration
      # Identifier of the object to call function on. Either objectId or executionContextId should
      # be specified.
      optional RemoteObjectId objectId
      # Call arguments. All call arguments must belong to the same JavaScript world as the target
      # object.
      optional array of CallArgument arguments
      # In silent mode exceptions thrown during evaluation are not reported and do not pause
      # execution. Overrides `setPauseOnException` state.
      optional boolean silent
      # Whether the result is expected to be a JSON object which should be sent by value.
      optional boolean returnByValue
      # Whether preview should be generated for the result.
      experimental optional boolean generatePreview
      # Whether execution should be treated as initiated by user in the UI.
      optional boolean userGesture
      # Whether execution should `await` for resulting value and return once awaited promise is
      # resolved.
      optional boolean awaitPromise
      # Specifies execution context which global object will be used to call function on. Either
      # executionContextId or objectId should be specified.
      optional ExecutionContextId executionContextId
      # Symbolic group name that can be used to release multiple objects. If objectGroup is not
      # specified and objectId is, objectGroup will be inherited from object.
      optional string objectGroup
    returns
      # Call result.
      RemoteObject result
      # Exception details.
      optional ExceptionDetails exceptionDetails

  # Compiles expression.
  command compileScript
    parameters
      # Expression to compile.
      string expression
      # Source url to be set for the script.
      string sourceURL
      # Specifies whether the compiled script should be persisted.
      boolean persistScript
      # Specifies in which execution context to perform script run. If the parameter is omitted the
      # evaluation will be performed in the context of the inspected page.
      optional ExecutionContextId executionContextId
    returns
      # Id of the script.
      optional ScriptId scriptId
      # Exception details.
      optional ExceptionDetails exceptionDetails

  # Disables reporting of execution contexts creation.
  command disable

  # Discards collected exceptions and console API calls.
  command discardConsoleEntries

  # Enables reporting of execution contexts creation by means of `executionContextCreated` event.
  # When the reporting gets enabled the event will be sent immediately for each existing execution
  # context.
  command enable

  # Evaluates expression on global object.
  command evaluate
    parameters
      # Expression to evaluate.
      string expression
      # Symbolic group name that can be used to release multiple objects.
      optional string objectGroup
      # Determines whether Command Line API should be available during the evaluation.
      optional boolean includeCommandLineAPI
      # In silent mode exceptions thrown during evaluation are not reported and do not pause
      # execution. Overrides `setPauseOnException` state.
      optional boolean silent
      # Specifies in which execution context to perform evaluation. If the parameter is omitted the
      # evaluation will be performed in the context of the inspected page.
      # This is mutually exclusive with `uniqueContextId`, which offers an
      # alternative way to identify the execution context that is more reliable
      # in a multi-process environment.
      optional ExecutionContextId contextId
      # Whether the result is expected to be a JSON object that should be sent by value.
      optional boolean returnByValue
      # Whether preview should be generated for the result.
      experimental optional boolean generatePreview
      # Whether execution should be treated as initiated by user in the UI.
      optional boolean userGesture
      # Whether execution should `await` for resulting value and return once awaited promise is
      # resolved.
      optional boolean awaitPromise
      # Whether to throw an exception if side effect cannot be ruled out during evaluation.
      # This implies `disableBreaks` below.
      experimental optional boolean throwOnSideEffect
      # Terminate execution after timing out (number of milliseconds).
      experimental optional TimeDelta timeout
      # Disable breakpoints during execution.
      experimental optional boolean disableBreaks
      # Setting this flag to true enables `let` re-declaration and top-level `await`.
      # Note that `let` variables can only be re-declared if they originate from
      # `replMode` themselves.
      experimental optional boolean replMode
      # The Content Security Policy (CSP) for the target might block 'unsafe-eval'
      # which includes eval(), Function(), setTimeout() and setInterval()
      # when called with non-callable arguments. This flag bypasses CSP for this
      # evaluation and allows unsafe-eval. Defaults to true.
      experimental optional boolean allowUnsafeEvalBlockedByCSP
      # An alternative way to specify the execution context to evaluate in.
      # Compared to contextId that may be reused accross processes, this is guaranteed to be
      # system-unique, so it can be used to prevent accidental evaluation of the expression
      # in context different than intended (e.g. as a result of navigation accross process
      # boundaries).
      # This is mutually exclusive with `contextId`.
      experimental optional string uniqueContextId
    returns
      # Evaluation result.
      RemoteObject result
      # Exception details.
      optional ExceptionDetails exceptionDetails

  # Returns the isolate id.
  experimental command getIsolateId
    returns
      # The isolate id.
      string id

  # Returns the JavaScript heap usage.
  # It is the total usage of the corresponding isolate not scoped to a particular Runtime.
  experimental command getHeapUsage
    returns
      # Used heap size in bytes.
      number usedSize
      # Allocated heap size in bytes.
      number totalSize

  # Returns properties of a given object. Object group of the result is inherited from the target
  # object.
  command getProperties
    parameters
      # Identifier of the object to return properties for.
      RemoteObjectId objectId
      # If true, returns properties belonging only to the element itself, not to its prototype
      # chain.
      optional boolean ownProperties
      # If true, returns accessor properties (with getter/setter) only; internal properties are not
      # returned either.
      experimental optional boolean accessorPropertiesOnly
      # Whether preview should be generated for the results.
      experimental optional boolean generatePreview
    returns
      # Object properties.
      array of PropertyDescriptor result
      # Internal object properties (only of the element itself).
      optional array of InternalPropertyDescriptor internalProperties
      # Object private properties.
      experimental optional array of PrivatePropertyDescriptor privateProperties
      # Exception details.
      optional ExceptionDetails exceptionDetails

  # Returns all let, const and class variables from global scope.
  command globalLexicalScopeNames
    parameters
      # Specifies in which execution context to lookup global scope variables.
      optional ExecutionContextId executionContextId
    returns
      array of string names

  command queryObjects
    parameters
      # Identifier of the prototype to return objects for.
      RemoteObjectId prototypeObjectId
      # Symbolic group name that can be used to release the results.
      optional string objectGroup
    returns
      # Array with objects.
      RemoteObject objects

  # Releases remote object with given id.
  command releaseObject
    parameters
      # Identifier of the object to release.
      RemoteObjectId objectId

  # Releases all remote objects that belong to a given group.
  command releaseObjectGroup
    parameters
      # Symbolic object group name.
      string objectGroup

  # Tells inspected instance to run if it was waiting for debugger to attach.
  command runIfWaitingForDebugger

  # Runs script with given id in a given context.
  command runScript
    parameters
      # Id of the script to run.
      ScriptId scriptId
      # Specifies in which execution context to perform script run. If the parameter is omitted the
      # evaluation will be performed in the context of the inspected page.
      optional ExecutionContextId executionContextId
      # Symbolic group name that can be used to release multiple objects.
      optional string objectGroup
      # In silent mode exceptions thrown during evaluation are not reported and do not pause
      # execution. Overrides `setPauseOnException` state.
      optional boolean silent
      # Determines whether Command Line API should be available during the evaluation.
      optional boolean includeCommandLineAPI
      # Whether the result is expected to be a JSON object which should be sent by value.
      optional boolean returnByValue
      # Whether preview should be generated for the result.
      optional boolean generatePreview
      # Whether execution should `await` for resulting value and return once awaited promise is
      # resolved.
      optional boolean awaitPromise
    returns
      # Run result.
      RemoteObject result
      # Exception details.
      optional ExceptionDetails exceptionDetails

  # Enables or disables async call stacks tracking.
  command setAsyncCallStackDepth
    redirect Debugger
    parameters
      # Maximum depth of async call stacks. Setting to `0` will effectively disable collecting async
      # call stacks (default).
      integer maxDepth

  experimental command setCustomObjectFormatterEnabled
    parameters
      boolean enabled

  experimental command setMaxCallStackSizeToCapture
    parameters
      integer size

  # Terminate current or next JavaScript execution.
  # Will cancel the termination when the outer-most script execution ends.
  experimental command terminateExecution

  # If executionContextId is empty, adds binding with the given name on the
  # global objects of all inspected contexts, including those created later,
  # bindings survive reloads.
  # Binding function takes exactly one argument, this argument should be string,
  # in case of any other input, function throws an exception.
  # Each binding function call produces Runtime.bindingCalled notification.
  experimental command addBinding
    parameters
      string name
      # If specified, the binding would only be exposed to the specified
      # execution context. If omitted and `executionContextName` is not set,
      # the binding is exposed to all execution contexts of the target.
      # This parameter is mutually exclusive with `executionContextName`.
      optional ExecutionContextId executionContextId
      # If specified, the binding is exposed to the executionContext with
      # matching name, even for contexts created after the binding is added.
      # See also `ExecutionContext.name` and `worldName` parameter to
      # `Page.addScriptToEvaluateOnNewDocument`.
      # This parameter is mutually exclusive with `executionContextId`.
      experimental optional string executionContextName

  # This method does not remove binding function from global object but
  # unsubscribes current runtime agent from Runtime.bindingCalled notifications.
  experimental command removeBinding
    parameters
      string name

  # Notification is issued every time when binding is called.
  experimental event bindingCalled
    parameters
      string name
      string payload
      # Identifier of the context where the call was made.
      ExecutionContextId executionContextId

  # Issued when console API was called.
  event consoleAPICalled
    parameters
      # Type of the call.
      enum type
        log
        debug
        info
        error
        warning
        dir
        dirxml
        table
        trace
        clear
        startGroup
        startGroupCollapsed
        endGroup
        assert
        profile
        profileEnd
        count
        timeEnd
      # Call arguments.
      array of RemoteObject args
      # Identifier of the context where the call was made.
      ExecutionContextId executionContextId
      # Call timestamp.
      Timestamp timestamp
      # Stack trace captured when the call was made. The async stack chain is automatically reported for
      # the following call types: `assert`, `error`, `trace`, `warning`. For other types the async call
      # chain can be retrieved using `Debugger.getStackTrace` and `stackTrace.parentId` field.
      optional StackTrace stackTrace
      # Console context descriptor for calls on non-default console context (not console.*):
      # 'anonymous#unique-logger-id' for call on unnamed context, 'name#unique-logger-id' for call
      # on named context.
      experimental optional string context

  # Issued when unhandled exception was revoked.
  event exceptionRevoked
    parameters
      # Reason describing why exception was revoked.
      string reason
      # The id of revoked exception, as reported in `exceptionThrown`.
      integer exceptionId

  # Issued when exception was thrown and unhandled.
  event exceptionThrown
    parameters
      # Timestamp of the exception.
      Timestamp timestamp
      ExceptionDetails exceptionDetails

  # Issued when new execution context is created.
  event executionContextCreated
    parameters
      # A newly created execution context.
      ExecutionContextDescription context

  # Issued when execution context is destroyed.
  event executionContextDestroyed
    parameters
      # Id of the destroyed context
      ExecutionContextId executionContextId

  # Issued when all executionContexts were cleared in browser
  event executionContextsCleared

  # Issued when object should be inspected (for example, as a result of inspect() command line API
  # call).
  event inspectRequested
    parameters
      RemoteObject object
      object hints

# This domain is deprecated.
deprecated domain Schema

  # Description of the protocol domain.
  type Domain extends object
    properties
      # Domain name.
      string name
      # Domain version.
      string version

  # Returns supported domains.
  command getDomains
    returns
      # List of supported domains.
      array of Domain domains