[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Animation](./puppeteer.protocol.animation.md) > [AnimationEffect](./puppeteer.protocol.animation.animationeffect.md) > [iterationStart](./puppeteer.protocol.animation.animationeffect.iterationstart.md) ## Protocol.Animation.AnimationEffect.iterationStart property `AnimationEffect`'s iteration start. Signature: ```typescript iterationStart: number; ```