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47 lines
1.3 KiB
Markdown
47 lines
1.3 KiB
Markdown
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
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[Home](./index.md) > [puppeteer](./puppeteer.md) > [ExecutionContext](./puppeteer.executioncontext.md) > [queryObjects](./puppeteer.executioncontext.queryobjects.md)
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## ExecutionContext.queryObjects() method
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This method iterates the JavaScript heap and finds all the objects with the given prototype.
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<b>Signature:</b>
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```typescript
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queryObjects(prototypeHandle: JSHandle): Promise<JSHandle>;
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```
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## Parameters
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| Parameter | Type | Description |
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| --- | --- | --- |
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| prototypeHandle | [JSHandle](./puppeteer.jshandle.md) | a handle to the object prototype |
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<b>Returns:</b>
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Promise<[JSHandle](./puppeteer.jshandle.md)<!-- -->>
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A handle to an array of objects with the given prototype.
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## Remarks
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## Example
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```js
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// Create a Map object
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await page.evaluate(() => window.map = new Map());
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// Get a handle to the Map object prototype
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const mapPrototype = await page.evaluateHandle(() => Map.prototype);
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// Query all map instances into an array
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const mapInstances = await page.queryObjects(mapPrototype);
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// Count amount of map objects in heap
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const count = await page.evaluate(maps => maps.length, mapInstances);
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await mapInstances.dispose();
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await mapPrototype.dispose();
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```
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