3.3 KiB
3.3 KiB
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| ExecutionContext |
ExecutionContext class
Warning: This API is now obsolete.
Do not use directly.
Represents a context for JavaScript execution.
Signature:
export declare class ExecutionContext
Remarks
Besides pages, execution contexts can be found in workers.
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the ExecutionContext class.
Example
A Page can have several execution contexts:
- Each Frame of a page has a "default" execution context that is always created after frame is attached to DOM. This context is returned by the Frame.executionContext() method. - Each Chrome extensions creates additional execution contexts to isolate their code.
Methods
| Method | Modifiers | Description |
|---|---|---|
| evaluate(pageFunction, args) | Evaluates the given function. | |
| evaluateHandle(pageFunction, args) | Evaluates the given function. Unlike evaluate, this method returns a handle to the result of the function. This method may be better suited if the object cannot be serialized (e.g. |
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| frame() | ||
| queryObjects(prototypeHandle) | Iterates through the JavaScript heap and finds all the objects with the given prototype. |