Skip to main content
Using Deno in production at your company? Earn free Deno merch.
Give us feedback
Go to Latest
method Page.prototype.queryObjects
import { Page } from "https://deno.land/x/puppeteer@14.1.1/vendor/puppeteer-core/puppeteer/common/Page.js";

This method iterates the JavaScript heap and finds all objects with the given prototype.

Examples

Example 1

// Create a Map object
await page.evaluate(() => window.map = new Map());
// Get a handle to the Map object prototype
const mapPrototype = await page.evaluateHandle(() => Map.prototype);
// Query all map instances into an array
const mapInstances = await page.queryObjects(mapPrototype);
// Count amount of map objects in heap
const count = await page.evaluate(maps => maps.length, mapInstances);
await mapInstances.dispose();
await mapPrototype.dispose();

Parameters

prototypeHandle: JSHandle
  • a handle to the object prototype.

Returns

Promise<JSHandle>

Promise which resolves to a handle to an array of objects with this prototype.