[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [LayerTree](./puppeteer.protocol.layertree.md) > [LayerTreeDidChangeEvent](./puppeteer.protocol.layertree.layertreedidchangeevent.md) ## Protocol.LayerTree.LayerTreeDidChangeEvent interface Signature: ```typescript export interface LayerTreeDidChangeEvent ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [layers](./puppeteer.protocol.layertree.layertreedidchangeevent.layers.md) | [Layer](./puppeteer.protocol.layertree.layer.md)\[\] | Layer tree, absent if not in the comspositing mode. |