[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Browser](./puppeteer.protocol.browser.md) > [GetHistogramsRequest](./puppeteer.protocol.browser.gethistogramsrequest.md) > [delta](./puppeteer.protocol.browser.gethistogramsrequest.delta.md) ## Protocol.Browser.GetHistogramsRequest.delta property If true, retrieve delta since last call. Signature: ```typescript delta?: boolean; ```