"use strict";(self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[40586],{3905:(e,t,n)=>{n.d(t,{Zo:()=>c,kt:()=>f});var r=n(67294);function a(e,t,n){return t in e?Object.defineProperty(e,t,{value:n,enumerable:!0,configurable:!0,writable:!0}):e[t]=n,e}function o(e,t){var n=Object.keys(e);if(Object.getOwnPropertySymbols){var r=Object.getOwnPropertySymbols(e);t&&(r=r.filter((function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable}))),n.push.apply(n,r)}return n}function p(e){for(var t=1;t<arguments.length;t++){var n=null!=arguments[t]?arguments[t]:{};t%2?o(Object(n),!0).forEach((function(t){a(e,t,n[t])})):Object.getOwnPropertyDescriptors?Object.defineProperties(e,Object.getOwnPropertyDescriptors(n)):o(Object(n)).forEach((function(t){Object.defineProperty(e,t,Object.getOwnPropertyDescriptor(n,t))}))}return e}function i(e,t){if(null==e)return{};var n,r,a=function(e,t){if(null==e)return{};var n,r,a={},o=Object.keys(e);for(r=0;r<o.length;r++)n=o[r],t.indexOf(n)>=0||(a[n]=e[n]);return a}(e,t);if(Object.getOwnPropertySymbols){var o=Object.getOwnPropertySymbols(e);for(r=0;r<o.length;r++)n=o[r],t.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(e,n)&&(a[n]=e[n])}return a}var l=r.createContext({}),u=function(e){var t=r.useContext(l),n=t;return e&&(n="function"==typeof e?e(t):p(p({},t),e)),n},c=function(e){var t=u(e.components);return r.createElement(l.Provider,{value:t},e.children)},m={inlineCode:"code",wrapper:function(e){var t=e.children;return r.createElement(r.Fragment,{},t)}},s=r.forwardRef((function(e,t){var n=e.components,a=e.mdxType,o=e.originalType,l=e.parentName,c=i(e,["components","mdxType","originalType","parentName"]),s=u(n),f=a,v=s["".concat(l,".").concat(f)]||s[f]||m[f]||o;return n?r.createElement(v,p(p({ref:t},c),{},{components:n})):r.createElement(v,p({ref:t},c))}));function f(e,t){var n=arguments,a=t&&t.mdxType;if("string"==typeof e||a){var o=n.length,p=new Array(o);p[0]=s;var i={};for(var l in t)hasOwnProperty.call(t,l)&&(i[l]=t[l]);i.originalType=e,i.mdxType="string"==typeof e?e:a,p[1]=i;for(var u=2;u<o;u++)p[u]=n[u];return r.createElement.apply(null,p)}return r.createElement.apply(null,n)}s.displayName="MDXCreateElement"},72358:(e,t,n)=>{n.r(t),n.d(t,{assets:()=>u,contentTitle:()=>i,default:()=>s,frontMatter:()=>p,metadata:()=>l,toc:()=>c});n(67294);var r=n(3905);function a(){return a=Object.assign||function(e){for(var t=1;t<arguments.length;t++){var n=arguments[t];for(var r in n)Object.prototype.hasOwnProperty.call(n,r)&&(e[r]=n[r])}return e},a.apply(this,arguments)}function o(e,t){if(null==e)return{};var n,r,a=function(e,t){if(null==e)return{};var n,r,a={},o=Object.keys(e);for(r=0;r<o.length;r++)n=o[r],t.indexOf(n)>=0||(a[n]=e[n]);return a}(e,t);if(Object.getOwnPropertySymbols){var o=Object.getOwnPropertySymbols(e);for(r=0;r<o.length;r++)n=o[r],t.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(e,n)&&(a[n]=e[n])}return a}const p={sidebar_label:"EventEmitter.on"},i="EventEmitter.on() method",l={unversionedId:"api/puppeteer.eventemitter.on",id:"version-19.6.2/api/puppeteer.eventemitter.on",title:"EventEmitter.on() method",description:"Bind an event listener to fire when an event occurs.",source:"@site/versioned_docs/version-19.6.2/api/puppeteer.eventemitter.on.md",sourceDirName:"api",slug:"/api/puppeteer.eventemitter.on",permalink:"/api/puppeteer.eventemitter.on",draft:!1,tags:[],version:"19.6.2",frontMatter:{sidebar_label:"EventEmitter.on"},sidebar:"api",previous:{title:"EventEmitter.off",permalink:"/api/puppeteer.eventemitter.off"},next:{title:"EventEmitter.once",permalink:"/api/puppeteer.eventemitter.once"}},u={},c=[{value:"Signature:",id:"signature",level:4},{value:"Parameters",id:"parameters",level:2}],m={toc:c};function s(e){var{components:t}=e,n=o(e,["components"]);return(0,r.kt)("wrapper",a({},m,n,{components:t,mdxType:"MDXLayout"}),(0,r.kt)("h1",a({},{id:"eventemitteron-method"}),"EventEmitter.on() method"),(0,r.kt)("p",null,"Bind an event listener to fire when an event occurs."),(0,r.kt)("h4",a({},{id:"signature"}),"Signature:"),(0,r.kt)("pre",null,(0,r.kt)("code",a({parentName:"pre"},{className:"language-typescript"}),"class EventEmitter {\n  on(event: EventType, handler: Handler<any>): EventEmitter;\n}\n")),(0,r.kt)("h2",a({},{id:"parameters"}),"Parameters"),(0,r.kt)("table",null,(0,r.kt)("thead",{parentName:"table"},(0,r.kt)("tr",{parentName:"thead"},(0,r.kt)("th",a({parentName:"tr"},{align:null}),"Parameter"),(0,r.kt)("th",a({parentName:"tr"},{align:null}),"Type"),(0,r.kt)("th",a({parentName:"tr"},{align:null}),"Description"))),(0,r.kt)("tbody",{parentName:"table"},(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),"event"),(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/api/puppeteer.eventtype"}),"EventType")),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"the event type you'd like to listen to. Can be a string or symbol.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),"handler"),(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/api/puppeteer.handler"}),"Handler"),"<","any",">"),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"the function to be called when the event occurs.")))),(0,r.kt)("p",null,(0,r.kt)("strong",{parentName:"p"},"Returns:")),(0,r.kt)("p",null,(0,r.kt)("a",a({parentName:"p"},{href:"/api/puppeteer.eventemitter"}),"EventEmitter")),(0,r.kt)("p",null,(0,r.kt)("inlineCode",{parentName:"p"},"this")," to enable you to chain method calls."))}s.isMDXComponent=!0}}]);