puppeteer/website/versioned_docs/version-18.1.0/api/puppeteer.page.queryobjects.md
release-please[bot] 3aee641c3d
chore(main): release 18.1.0 (#9042)
🤖 I have created a release *beep* *boop*
---


##
[18.1.0](https://github.com/puppeteer/puppeteer/compare/v18.0.5...v18.1.0)
(2022-10-05)


### Features

* **chromium:** roll to Chromium 107.0.5296.0 (r1045629)
([#9039](https://github.com/puppeteer/puppeteer/issues/9039))
([022fbde](022fbde85e))

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sidebar_label
Page.queryObjects

Page.queryObjects() method

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

Signature:

class Page {
  queryObjects<Prototype>(
    prototypeHandle: JSHandle<Prototype>
  ): Promise<JSHandle<Prototype[]>>;
}

Parameters

Parameter Type Description
prototypeHandle JSHandle<Prototype> a handle to the object prototype.

Returns:

Promise<JSHandle<Prototype[]>>

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

Example

// 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();