puppeteer/assets/js/3d429610.bfabf89b.js

/*! For license information please see 3d429610.bfabf89b.js.LICENSE.txt */
"use strict";(self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[57248],{27771:(e,r,t)=>{t.r(r),t.d(r,{assets:()=>o,contentTitle:()=>i,default:()=>d,frontMatter:()=>s,metadata:()=>l,toc:()=>u});var n=t(85893),a=t(11151);const s={sidebar_label:"WebWorker.evaluate"},i="WebWorker.evaluate() method",l={id:"api/puppeteer.webworker.evaluate",title:"WebWorker.evaluate() method",description:"Evaluates a given function in the worker.",source:"@site/versioned_docs/version-22.0.0/api/puppeteer.webworker.evaluate.md",sourceDirName:"api",slug:"/api/puppeteer.webworker.evaluate",permalink:"/api/puppeteer.webworker.evaluate",draft:!1,unlisted:!1,tags:[],version:"22.0.0",frontMatter:{sidebar_label:"WebWorker.evaluate"},sidebar:"api",previous:{title:"WebWorker",permalink:"/api/puppeteer.webworker"},next:{title:"WebWorker.evaluateHandle",permalink:"/api/puppeteer.webworker.evaluatehandle"}},o={},u=[{value:"Signature:",id:"signature",level:4},{value:"Parameters",id:"parameters",level:2},{value:"Remarks",id:"remarks",level:2}];function c(e){const r={a:"a",code:"code",h1:"h1",h2:"h2",h4:"h4",p:"p",pre:"pre",strong:"strong",table:"table",tbody:"tbody",td:"td",th:"th",thead:"thead",tr:"tr",...(0,a.a)(),...e.components};return(0,n.jsxs)(n.Fragment,{children:[(0,n.jsx)(r.h1,{id:"webworkerevaluate-method",children:"WebWorker.evaluate() method"}),"\n",(0,n.jsxs)(r.p,{children:["Evaluates a given function in the ",(0,n.jsx)(r.a,{href:"/api/puppeteer.webworker",children:"worker"}),"."]}),"\n",(0,n.jsx)(r.h4,{id:"signature",children:"Signature:"}),"\n",(0,n.jsx)(r.pre,{children:(0,n.jsx)(r.code,{className:"language-typescript",children:"class WebWorker {\n  evaluate<\n    Params extends unknown[],\n    Func extends EvaluateFunc<Params> = EvaluateFunc<Params>,\n  >(func: Func | string, ...args: Params): Promise<Awaited<ReturnType<Func>>>;\n}\n"})}),"\n",(0,n.jsx)(r.h2,{id:"parameters",children:"Parameters"}),"\n",(0,n.jsxs)(r.table,{children:[(0,n.jsx)(r.thead,{children:(0,n.jsxs)(r.tr,{children:[(0,n.jsx)(r.th,{children:"Parameter"}),(0,n.jsx)(r.th,{children:"Type"}),(0,n.jsx)(r.th,{children:"Description"})]})}),(0,n.jsxs)(r.tbody,{children:[(0,n.jsxs)(r.tr,{children:[(0,n.jsx)(r.td,{children:"func"}),(0,n.jsx)(r.td,{children:"Func | string"}),(0,n.jsx)(r.td,{children:"Function to be evaluated."})]}),(0,n.jsxs)(r.tr,{children:[(0,n.jsx)(r.td,{children:"args"}),(0,n.jsx)(r.td,{children:"Params"}),(0,n.jsxs)(r.td,{children:["Arguments to pass into ",(0,n.jsx)("code",{children:"func"}),"."]})]})]})]}),"\n",(0,n.jsx)(r.p,{children:(0,n.jsx)(r.strong,{children:"Returns:"})}),"\n",(0,n.jsx)(r.p,{children:"Promise<Awaited<ReturnType<Func>>>"}),"\n",(0,n.jsxs)(r.p,{children:["The result of ",(0,n.jsx)(r.code,{children:"func"}),"."]}),"\n",(0,n.jsx)(r.h2,{id:"remarks",children:"Remarks"}),"\n",(0,n.jsxs)(r.p,{children:["If the given function returns a promise, ",(0,n.jsx)(r.a,{href:"/api/puppeteer.webworker.evaluate",children:"evaluate"})," will wait for the promise to resolve."]}),"\n",(0,n.jsxs)(r.p,{children:["As a rule of thumb, if the return value of the given function is more complicated than a JSON object (e.g. most classes), then ",(0,n.jsx)(r.a,{href:"/api/puppeteer.webworker.evaluate",children:"evaluate"})," will _likely_ return some truncated value (or ",(0,n.jsx)(r.code,{children:"{}"}),"). This is because we are not returning the actual return value, but a deserialized version as a result of transferring the return value through a protocol to Puppeteer."]}),"\n",(0,n.jsxs)(r.p,{children:["In general, you should use ",(0,n.jsx)(r.a,{href:"/api/puppeteer.webworker.evaluatehandle",children:"evaluateHandle"})," if ",(0,n.jsx)(r.a,{href:"/api/puppeteer.webworker.evaluate",children:"evaluate"})," cannot serialize the return value properly or you need a mutable ",(0,n.jsx)(r.a,{href:"/api/puppeteer.jshandle",children:"handle"})," to the return object."]})]})}function d(e={}){const{wrapper:r}={...(0,a.a)(),...e.components};return r?(0,n.jsx)(r,{...e,children:(0,n.jsx)(c,{...e})}):c(e)}},75251:(e,r,t)=>{var n=t(67294),a=Symbol.for("react.eleme