Chrome DevTools

tot: Runtime

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.

Commands

Runtime.callFunctionOn

request: {
"id": <number>,
"method": "Runtime.callFunctionOn",
"params": {
  "objectId": <RemoteObjectId>,
  "functionDeclaration": <string>,
  "arguments": <array of CallArgument>,
  "returnByValue": <boolean>
}
}
response: {
"id": <number>,
"error": <object>,
"result": {
  "result": <RemoteObject>,
  "wasThrown": <boolean>
}
}

Calls function with given declaration on the given object. Object group of the result is inherited from the target object.

Parameters

objectId
Identifier of the object to call function on.
functionDeclaration
( string )
Declaration of the function to call.
arguments
( optional array of CallArgument )
Call arguments. All call arguments must belong to the same JavaScript world as the target object.
returnByValue
( optional boolean )
Whether the result is expected to be a JSON object which should be sent by value.

Returns

result
Call result.
wasThrown
( optional boolean )
True if the result was thrown during the evaluation.

Runtime.enable

request: {
"id": <number>,
"method": "Runtime.enable"
}
response: {
"id": <number>,
"error": <object>
}

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.

Runtime.evaluate

request: {
"id": <number>,
"method": "Runtime.evaluate",
"params": {
  "expression": <string>,
  "objectGroup": <string>,
  "contextId": <Runtime.ExecutionContextId>,
  "returnByValue": <boolean>
}
}
response: {
"id": <number>,
"error": <object>,
"result": {
  "result": <RemoteObject>,
  "wasThrown": <boolean>
}
}

Evaluates expression on global object.

Parameters

expression
( string )
Expression to evaluate.
objectGroup
( optional string )
Symbolic group name that can be used to release multiple objects.
contextId
Specifies in which isolated context to perform evaluation. 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.
returnByValue
( optional boolean )
Whether the result is expected to be a JSON object that should be sent by value.

Returns

result
Evaluation result.
wasThrown
( optional boolean )
True if the result was thrown during the evaluation.

Runtime.getProperties

request: {
"id": <number>,
"method": "Runtime.getProperties",
"params": {
  "objectId": <RemoteObjectId>,
  "ownProperties": <boolean>
}
}
response: {
"id": <number>,
"error": <object>,
"result": {
  "result": <array of PropertyDescriptor>
}
}

Returns properties of a given object. Object group of the result is inherited from the target object.

Parameters

objectId
Identifier of the object to return properties for.
ownProperties
( optional boolean )
If true, returns properties belonging only to the element itself, not to its prototype chain.

Returns

result
( array of PropertyDescriptor )
Object properties.

Runtime.releaseObject

request: {
"id": <number>,
"method": "Runtime.releaseObject",
"params": {
  "objectId": <RemoteObjectId>
}
}
response: {
"id": <number>,
"error": <object>
}

Releases remote object with given id.

Parameters

objectId
Identifier of the object to release.

Runtime.releaseObjectGroup

request: {
"id": <number>,
"method": "Runtime.releaseObjectGroup",
"params": {
  "objectGroup": <string>
}
}
response: {
"id": <number>,
"error": <object>
}

Releases all remote objects that belong to a given group.

Parameters

objectGroup
( string )
Symbolic object group name.

Notifications

Runtime.executionContextCreated

{
"method": "Runtime.executionContextCreated",
"params": {
  "context": <ExecutionContextDescription>
}
}

Issued when new execution context is created.

Parameters

context
A newly created execution contex.

Types

CallArgument: object

objectId
( optional RemoteObjectId )
Remote object handle.
value
( optional any )
Primitive value.

ExecutionContextDescription: object

frameId
Id of the owning frame.
id
Unique id of the execution context. It can be used to specify in which execution context script evaluation should be performed.

ExecutionContextId: integer

PropertyDescriptor: object

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

RemoteObject: object

className
( optional string )
Object class (constructor) name. Specified for object type values only.
description
( optional string )
String representation of the object.
objectId
( optional RemoteObjectId )
Unique object identifier (for non-primitive values).
subtype
( optional enumerated string [ "array" , "date" , "node" , "null" , "regexp" ] )
Object subtype hint. Specified for object type values only.
type
( enumerated string [ "boolean" , "function" , "number" , "object" , "string" , "undefined" ] )
Object type.
value
( optional any )
Remote object value (in case of primitive values or JSON values if it was requested).

RemoteObjectId: string

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