ExecutionContext | /mod.ts | puppeteer@16.2.0

class ExecutionContext

Re-export

Deprecated

Do not use directly.

Represents a context for JavaScript execution.

import { ExecutionContext } from "https://deno.land/x/puppeteer@16.2.0/mod.ts";

Examples

A Page can have several execution contexts:

Each Frame of a Page | 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.

Constructors

new

ExecutionContext(

client: CDPSession,

contextPayload: Protocol.Runtime.ExecutionContextDescription,

world?: IsolatedWorld,

)

Properties

_client: CDPSession

_contextId: number

_contextName: string

optional

_world: IsolatedWorld

Methods

evaluate<Params extends unknown[], Func extends EvaluateFunc<Params> = EvaluateFunc<Params>>(pageFunction: Func | string, ...args: Params): Promise<Awaited<ReturnType<Func>>>

Evaluates the given function.

evaluateHandle<Params extends unknown[], Func extends EvaluateFunc<Params> = EvaluateFunc<Params>>(pageFunction: Func | string, ...args: Params): Promise<HandleFor<Awaited<ReturnType<Func>>>>

Evaluates the given function.

Unlike ExecutionContext.evaluate | 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. Map) and requires further manipulation.

frame(): Frame | null

queryObjects<Prototype>(prototypeHandle: JSHandle<Prototype>): Promise<HandleFor<Prototype[]>>

Iterates through the JavaScript heap and finds all the objects with the given prototype.