puppeteer/new-docs/puppeteer.coverage.startjscoverage.md

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Coverage](./puppeteer.coverage.md) &gt; [startJSCoverage](./puppeteer.coverage.startjscoverage.md)

## Coverage.startJSCoverage() method

<b>Signature:</b>

```typescript
startJSCoverage(options?: JSCoverageOptions): Promise<void>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  options | [JSCoverageOptions](./puppeteer.jscoverageoptions.md) | defaults to <code>{ resetOnNavigation : true, reportAnonymousScripts : false }</code> |

<b>Returns:</b>

Promise&lt;void&gt;

Promise that resolves when coverage is started.

## Remarks

Anonymous scripts are ones that don't have an associated url. These are scripts that are dynamically created on the page using `eval` or `new Function`<!-- -->. If `reportAnonymousScripts` is set to `true`<!-- -->, anonymous scripts will have `__puppeteer_evaluation_script__` as their URL.
chore: commit base new-docs (#5973) This adds the new docs that are generated by API Extractor via TSDoc. They are sparse because we do not yet use TSDoc in the codebase. This is the starting point and from here we can work through all the different classes and improve the documentation. 2020-06-04 14:56:45 +00:00			`<!-- Do not edit this file. It is automatically generated by API Documenter. -->`

			`[Home](./index.md) > [puppeteer](./puppeteer.md) > [Coverage](./puppeteer.coverage.md) > [startJSCoverage](./puppeteer.coverage.startjscoverage.md)`

			`## Coverage.startJSCoverage() method`

			`<b>Signature:</b>`

			```typescript
docs(new): Add TSDoc to Coverage class (#6106) 2020-06-29 08:53:28 +00:00			`startJSCoverage(options?: JSCoverageOptions): Promise<void>;`
chore: commit base new-docs (#5973) This adds the new docs that are generated by API Extractor via TSDoc. They are sparse because we do not yet use TSDoc in the codebase. This is the starting point and from here we can work through all the different classes and improve the documentation. 2020-06-04 14:56:45 +00:00			```

			`## Parameters`

			`\| Parameter \| Type \| Description \|`
			`\| --- \| --- \| --- \|`
docs(new): Add TSDoc to Coverage class (#6106) 2020-06-29 08:53:28 +00:00			`\| options \| [JSCoverageOptions](./puppeteer.jscoverageoptions.md) \| defaults to <code>{ resetOnNavigation : true, reportAnonymousScripts : false }</code> \|`
chore: commit base new-docs (#5973) This adds the new docs that are generated by API Extractor via TSDoc. They are sparse because we do not yet use TSDoc in the codebase. This is the starting point and from here we can work through all the different classes and improve the documentation. 2020-06-04 14:56:45 +00:00
			`<b>Returns:</b>`

			`Promise<void>`

docs(new): Add TSDoc to Coverage class (#6106) 2020-06-29 08:53:28 +00:00			`Promise that resolves when coverage is started.`

			`## Remarks`

			Anonymous scripts are ones that don't have an associated url. These are scripts that are dynamically created on the page using `eval` or `new Function`<!-- -->. If `reportAnonymousScripts` is set to `true`<!-- -->, anonymous scripts will have `__puppeteer_evaluation_script__` as their URL.