ExecutionContext class

The class represents a context for JavaScript execution. A Page might have many execution contexts:

  • each frame has "default" execution context that is always created after frame is attached to DOM. This context is returned by the frame.executionContext method.
  • Extensions's content scripts create additional execution contexts.

Besides pages, execution contexts can be found in workers.

Constructors

ExecutionContext(Client client, ExecutionContextDescription context, DomWorld? world)

Properties

client → Client
final
context → ExecutionContextDescription
final
domApi → DOMApi
final
frame → Frame?
Frame associated with this execution context.
no setter
hashCode → int
The hash code for this object.
no setterinherited
pageApi → PageApi
final
runtimeApi → RuntimeApi
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
world → DomWorld?
final

Methods

adoptBackendNodeId(BackendNodeId backendNodeId) → Future<ElementHandle>
adoptElementHandle(ElementHandle elementHandle) → Future<ElementHandle>
evaluate<T>(String pageFunction, {List? args}) → Future<T>
If the function passed to the executionContext.evaluate returns a Promise, then executionContext.evaluate would wait for the promise to resolve and return its value.
evaluateHandle<T extends JsHandle>(String pageFunction, {List? args}) → Future<T>
The only difference between executionContext.evaluate and executionContext.evaluateHandle is that executionContext.evaluateHandle returns in-page object (JSHandle).
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
queryObjects(JsHandle prototypeHandle) → Future<JsHandle>
The method iterates the JavaScript heap and finds all the objects with the given prototype.
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited