mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
48 lines
1.3 KiB
Markdown
48 lines
1.3 KiB
Markdown
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
|
|
|
|
[Home](./index.md) > [puppeteer](./puppeteer.md) > [Page](./puppeteer.page.md) > [queryObjects](./puppeteer.page.queryobjects.md)
|
|
|
|
## Page.queryObjects() method
|
|
|
|
This method iterates the JavaScript heap and finds all objects with the given prototype.
|
|
|
|
<b>Signature:</b>
|
|
|
|
```typescript
|
|
queryObjects(prototypeHandle: JSHandle): Promise<JSHandle>;
|
|
```
|
|
|
|
## Parameters
|
|
|
|
| Parameter | Type | Description |
|
|
| --- | --- | --- |
|
|
| prototypeHandle | [JSHandle](./puppeteer.jshandle.md) | a handle to the object prototype. |
|
|
|
|
<b>Returns:</b>
|
|
|
|
Promise<[JSHandle](./puppeteer.jshandle.md)>
|
|
|
|
Promise which resolves to a handle to an array of objects with this prototype.
|
|
|
|
## Remarks
|
|
|
|
Shortcut for [page.mainFrame().executionContext().queryObjects(prototypeHandle)](./puppeteer.executioncontext.queryobjects.md).
|
|
|
|
## Example
|
|
|
|
|
|
```js
|
|
// 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();
|
|
|
|
```
|
|
|