The Coverage class provides methods to gathers information about parts of JavaScript and CSS that were used by the page.
**Signature:**
```typescript
export declare class Coverage
```
## Remarks
To output coverage in a form consumable by [Istanbul](https://github.com/istanbuljs), see [puppeteer-to-istanbul](https://github.com/istanbuljs/puppeteer-to-istanbul).
## Example
An example of using JavaScript and CSS coverage to get percentage of initially executed code: