mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
1 line
8.0 KiB
JavaScript
1 line
8.0 KiB
JavaScript
"use strict";(self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[63706],{3905:(e,t,n)=>{n.d(t,{Zo:()=>s,kt:()=>c});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 l(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 i(e){for(var t=1;t<arguments.length;t++){var n=null!=arguments[t]?arguments[t]:{};t%2?l(Object(n),!0).forEach((function(t){a(e,t,n[t])})):Object.getOwnPropertyDescriptors?Object.defineProperties(e,Object.getOwnPropertyDescriptors(n)):l(Object(n)).forEach((function(t){Object.defineProperty(e,t,Object.getOwnPropertyDescriptor(n,t))}))}return e}function p(e,t){if(null==e)return{};var n,r,a=function(e,t){if(null==e)return{};var n,r,a={},l=Object.keys(e);for(r=0;r<l.length;r++)n=l[r],t.indexOf(n)>=0||(a[n]=e[n]);return a}(e,t);if(Object.getOwnPropertySymbols){var l=Object.getOwnPropertySymbols(e);for(r=0;r<l.length;r++)n=l[r],t.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(e,n)&&(a[n]=e[n])}return a}var o=r.createContext({}),m=function(e){var t=r.useContext(o),n=t;return e&&(n="function"==typeof e?e(t):i(i({},t),e)),n},s=function(e){var t=m(e.components);return r.createElement(o.Provider,{value:t},e.children)},u={inlineCode:"code",wrapper:function(e){var t=e.children;return r.createElement(r.Fragment,{},t)}},d=r.forwardRef((function(e,t){var n=e.components,a=e.mdxType,l=e.originalType,o=e.parentName,s=p(e,["components","mdxType","originalType","parentName"]),d=m(n),c=a,v=d["".concat(o,".").concat(c)]||d[c]||u[c]||l;return n?r.createElement(v,i(i({ref:t},s),{},{components:n})):r.createElement(v,i({ref:t},s))}));function c(e,t){var n=arguments,a=t&&t.mdxType;if("string"==typeof e||a){var l=n.length,i=new Array(l);i[0]=d;var p={};for(var o in t)hasOwnProperty.call(t,o)&&(p[o]=t[o]);p.originalType=e,p.mdxType="string"==typeof e?e:a,i[1]=p;for(var m=2;m<l;m++)i[m]=n[m];return r.createElement.apply(null,i)}return r.createElement.apply(null,n)}d.displayName="MDXCreateElement"},81285:(e,t,n)=>{n.r(t),n.d(t,{assets:()=>m,contentTitle:()=>p,default:()=>d,frontMatter:()=>i,metadata:()=>o,toc:()=>s});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 l(e,t){if(null==e)return{};var n,r,a=function(e,t){if(null==e)return{};var n,r,a={},l=Object.keys(e);for(r=0;r<l.length;r++)n=l[r],t.indexOf(n)>=0||(a[n]=e[n]);return a}(e,t);if(Object.getOwnPropertySymbols){var l=Object.getOwnPropertySymbols(e);for(r=0;r<l.length;r++)n=l[r],t.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(e,n)&&(a[n]=e[n])}return a}const i={sidebar_label:"EventEmitter"},p="EventEmitter class",o={unversionedId:"api/puppeteer.eventemitter",id:"api/puppeteer.eventemitter",title:"EventEmitter class",description:"The EventEmitter class that many Puppeteer classes extend.",source:"@site/../docs/api/puppeteer.eventemitter.md",sourceDirName:"api",slug:"/api/puppeteer.eventemitter",permalink:"/next/api/puppeteer.eventemitter",draft:!1,tags:[],version:"current",frontMatter:{sidebar_label:"EventEmitter"},sidebar:"api",previous:{title:"TimeoutError",permalink:"/next/api/puppeteer.timeouterror"},next:{title:"EventEmitter.addListener",permalink:"/next/api/puppeteer.eventemitter.addlistener"}},m={},s=[{value:"Signature:",id:"signature",level:4},{value:"Remarks",id:"remarks",level:2},{value:"Methods",id:"methods",level:2}],u={toc:s};function d(e){var{components:t}=e,n=l(e,["components"]);return(0,r.kt)("wrapper",a({},u,n,{components:t,mdxType:"MDXLayout"}),(0,r.kt)("h1",a({},{id:"eventemitter-class"}),"EventEmitter class"),(0,r.kt)("p",null,"The EventEmitter class that many Puppeteer classes extend."),(0,r.kt)("h4",a({},{id:"signature"}),"Signature:"),(0,r.kt)("pre",null,(0,r.kt)("code",a({parentName:"pre"},{className:"language-typescript"}),"export declare class EventEmitter implements CommonEventEmitter\n")),(0,r.kt)("p",null,(0,r.kt)("strong",{parentName:"p"},"Implements:")," ",(0,r.kt)("a",a({parentName:"p"},{href:"/next/api/puppeteer.commoneventemitter"}),"CommonEventEmitter")),(0,r.kt)("h2",a({},{id:"remarks"}),"Remarks"),(0,r.kt)("p",null,"This allows you to listen to events that Puppeteer classes fire and act accordingly. Therefore you'll mostly use ",(0,r.kt)("a",a({parentName:"p"},{href:"/next/api/puppeteer.eventemitter.on"}),"on")," and ",(0,r.kt)("a",a({parentName:"p"},{href:"/next/api/puppeteer.eventemitter.off"}),"off")," to bind and unbind to event listeners."),(0,r.kt)("p",null,"The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the ",(0,r.kt)("inlineCode",{parentName:"p"},"EventEmitter")," class."),(0,r.kt)("h2",a({},{id:"methods"}),"Methods"),(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}),"Method"),(0,r.kt)("th",a({parentName:"tr"},{align:null}),"Modifiers"),(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}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.addlistener"}),"addListener(event, handler)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Add an event listener.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.emit"}),"emit(event, eventData)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Emit an event and call any associated listeners.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.listenercount"}),"listenerCount(event)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Gets the number of listeners for a given event.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.off"}),"off(event, handler)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Remove an event listener from firing.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.on"}),"on(event, handler)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Bind an event listener to fire when an event occurs.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.once"}),"once(event, handler)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Like ",(0,r.kt)("code",null,"on")," but the listener will only be fired once and then it will be removed.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.removealllisteners"}),"removeAllListeners(event)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Removes all listeners. If given an event argument, it will remove only listeners for that event.")),(0,r.kt)("tr",{parentName:"tbody"},(0,r.kt)("td",a({parentName:"tr"},{align:null}),(0,r.kt)("a",a({parentName:"td"},{href:"/next/api/puppeteer.eventemitter.removelistener"}),"removeListener(event, handler)")),(0,r.kt)("td",a({parentName:"tr"},{align:null})),(0,r.kt)("td",a({parentName:"tr"},{align:null}),"Remove an event listener.")))))}d.isMDXComponent=!0}}]); |