[Home](./index.md) > [puppeteer](./puppeteer.md) > [CommonEventEmitter](./puppeteer.commoneventemitter.md) ## CommonEventEmitter interface Signature: ```typescript export interface CommonEventEmitter ``` ## Methods | Method | Description | | --- | --- | | [addListener(event, handler)](./puppeteer.commoneventemitter.addlistener.md) | | | [emit(event, eventData)](./puppeteer.commoneventemitter.emit.md) | | | [listenerCount(event)](./puppeteer.commoneventemitter.listenercount.md) | | | [off(event, handler)](./puppeteer.commoneventemitter.off.md) | | | [on(event, handler)](./puppeteer.commoneventemitter.on.md) | | | [once(event, handler)](./puppeteer.commoneventemitter.once.md) | | | [removeAllListeners(event)](./puppeteer.commoneventemitter.removealllisteners.md) | | | [removeListener(event, handler)](./puppeteer.commoneventemitter.removelistener.md) | |