"use strict";(self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[98011],{3905:(e,t,n)=>{n.d(t,{Zo:()=>u,kt:()=>d});varr=n(67294);functiona(e,t,n){returntine?Object.defineProperty(e,t,{value:n,enumerable:!0,configurable:!0,writable:!0}):e[t]=n,e}functioni(e,t){varn=Object.keys(e);if(Object.getOwnPropertySymbols){varr=Object.getOwnPropertySymbols(e);t&&(r=r.filter((function(t){returnObject.getOwnPropertyDescriptor(e,t).enumerable}))),n.push.apply(n,r)}returnn}functionl(e){for(vart=1;t<arguments.length;t++){varn=null!=arguments[t]?arguments[t]:{};t%2?i(Object(n),!0).forEach((function(t){a(e,t,n[t])})):Object.getOwnPropertyDescriptors?Object.defineProperties(e,Object.getOwnPropertyDescriptors(n)):i(Object(n)).forEach((function(t){Object.defineProperty(e,t,Object.getOwnPropertyDescriptor(n,t))}))}returne}functiono(e,t){if(null==e)return{};varn,r,a=function(e,t){if(null==e)return{};varn,r,a={},i=Object.keys(e);for(r=0;r<i.length;r++)n=i[r],t.indexOf(n)>=0||(a[n]=e[n]);returna}(e,t);if(Object.getOwnPropertySymbols){vari=Object.getOwnPropertySymbols(e);for(r=0;r<i.length;r++)n=i[r],t.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(e,n)&&(a[n]=e[n])}returna}varp=r.createContext({}),c=function(e){vart=r.useContext(p),n=t;returne&&(n="function"==typeofe?e(t):l(l({},t),e)),n},u=function(e){vart=c(e.components);returnr.createElement(p.Provider,{value:t},e.children)},s={inlineCode:"code",wrapper:function(e){vart=e.children;returnr.createElement(r.Fragment,{},t)}},m=r.forwardRef((function(e,t){varn=e.components,a=e.mdxType,i=e.originalType,p=e.parentName,u=o(e,["components","mdxType","originalType","parentName"]),m=c(n),d=a,v=m["".concat(p,".").concat(d)]||m[d]||s[d]||i;returnn?r.createElement(v,l(l({ref:t},u),{},{components:n})):r.createElement(v,l({ref:t},u))}));functiond(e,t){varn=arguments,a=t&&t.mdxType;if("string"==typeofe||a){vari=n.length,l=newArray(i);l[0]=m;varo={};for(varpint)hasOwnProperty.call(t,p)&&(o[p]=t[p]);o.originalType=e,o.mdxType="string"==typeofe?e:a,l[1]=o;for(varc=2;c<i;c++)l[c]=n[c];returnr.createElement.apply(null,l)}returnr.createElement.apply(null,n)}m.displayName="MDXCreateElement"},29267:(e,t,n)=>{n.r(t),n.d(t,{assets:()=>c,contentTitle:()=>o,default:()=>m,frontMatter:()=>l,metadata:()=>p,toc:()=>u});n(67294);varr=n(3905);functiona(){returna=Object.assign||function(e){for(vart=1;t<arguments.length;t++){varn=arguments[t];for(varrinn)Object.prototype.hasOwnProperty.call(n,r)&&(e[r]=n[r])}returne},a.apply(this,arguments)}functioni(e,t){if(null==e)return{};varn,r,a=function(e,t){if(null==e)return{};varn,r,a={},i=Object.keys(e);for(r=0;r<i.length;r++)n=i[r],t.indexOf(n)>=0||(a[n]=e[n]);returna}(e,t);if(Object.getOwnPropertySymbols){vari=Object.getOwnPropertySymbols(e);for(r=0;r<i.length;r++)n=i[r],t.indexOf(n)>=0||Object.prototype.propertyIsEnumerable.call(e,n)&&(a[n]=e[n])}returna}constl={sidebar_label:"EventEmitter.once"},o="EventEmitter.once() method",p={unversionedId:"api/puppeteer.eventemitter.once",id:"version-21.5.0/api/puppeteer.eventemitter.once",title:"EventEmitter.once() method",description:"Like on but the listener will only be fired once and then it will be removed.",source:"@site/versioned_docs/version-21.5.0/api/puppeteer.eventemitter.once.md",sourceDirName:"api",slug:"/api/puppeteer.eventemitter.once",permalink:"/api/puppeteer.eventemitter.once",draft:!1,tags:[],version:"21.5.0",frontMatter:{sidebar_label:"EventEmitter.once"},sidebar:"api",previous:{title:"EventEmitter.on",permalink:"/api/puppeteer.eventemitter.on"},next:{title:"EventEmitter.removeAllListeners",permalink:"/api/puppeteer.eventemitter.removealllisteners"}},c={},u=[{value:"Signature:",id:"signature",level:4},{value:"Parameters",id:"parameters",level:2}],s={toc:u};functionm(e){var{components:t}=e,n=i(e,["components"]);return(0,r.kt)("wrapper",a({},s,n,{components:t,mdxType:"MDXLayout"}),(0,r.kt)("h1",a({},{id:"eventemitteronce-method"}),"EventEmitter.once() method"),(0,r.kt)("p",null,"Like ",(0,r.kt)("inlineCode",{parentName:"p"},"on"),"butthelisten