puppeteer/new-docs/puppeteer.protocol.runtime.custompreview.header.md
2020-07-13 14:01:35 +01:00

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [Runtime](./puppeteer.protocol.runtime.md) &gt; [CustomPreview](./puppeteer.protocol.runtime.custompreview.md) &gt; [header](./puppeteer.protocol.runtime.custompreview.header.md)
## Protocol.Runtime.CustomPreview.header property
The JSON-stringified result of formatter.header(object, config) call. It contains json ML array that represents RemoteObject.
<b>Signature:</b>
```typescript
header: string;
```