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https://github.com/puppeteer/puppeteer
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29 lines
2.1 KiB
Markdown
29 lines
2.1 KiB
Markdown
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---
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sidebar_label: ExecutionContext
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---
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# ExecutionContext class
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This class represents a context for JavaScript execution. A \[Page\] might have many execution contexts: - each [frame](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe) has "default" execution context that is always created after frame is attached to DOM. This context is returned by the [Frame.executionContext()](./puppeteer.frame.executioncontext.md) method. - [Extension](https://developer.chrome.com/extensions)'s content scripts create additional execution contexts.
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Besides pages, execution contexts can be found in [workers](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API).
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**Signature:**
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```typescript
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export declare class ExecutionContext
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```
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## Remarks
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The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `ExecutionContext` class.
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## Methods
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| Method | Modifiers | Description |
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| ------------------------------------------------------------------------------------ | --------- | -------------------------------------------------------------------------------------------- |
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| [evaluate(pageFunction, args)](./puppeteer.executioncontext.evaluate.md) | | |
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| [evaluateHandle(pageFunction, args)](./puppeteer.executioncontext.evaluatehandle.md) | | |
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| [frame()](./puppeteer.executioncontext.frame.md) | | |
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| [queryObjects(prototypeHandle)](./puppeteer.executioncontext.queryobjects.md) | | This method iterates the JavaScript heap and finds all the objects with the given prototype. |
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