[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [CSS](./puppeteer.protocol.css.md) > [RuleUsage](./puppeteer.protocol.css.ruleusage.md) > [startOffset](./puppeteer.protocol.css.ruleusage.startoffset.md) ## Protocol.CSS.RuleUsage.startOffset property Offset of the start of the rule (including selector) from the beginning of the stylesheet. Signature: ```typescript startOffset: number; ```