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https://github.com/puppeteer/puppeteer
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2 lines
5.1 KiB
JavaScript
2 lines
5.1 KiB
JavaScript
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/*! For license information please see 2011cc1c.f8d27e02.js.LICENSE.txt */
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"use strict";(self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[82774],{3546:(e,n,t)=>{t.r(n),t.d(n,{assets:()=>d,contentTitle:()=>i,default:()=>h,frontMatter:()=>s,metadata:()=>a,toc:()=>c});var r=t(85893),l=t(11151);const s={sidebar_label:"ElementHandle.$eval"},i="ElementHandle.$eval() method",a={id:"api/puppeteer.elementhandle._eval",title:"ElementHandle.$eval() method",description:"Runs the given function on the first element matching the given selector in the current element.",source:"@site/versioned_docs/version-22.8.2/api/puppeteer.elementhandle._eval.md",sourceDirName:"api",slug:"/api/puppeteer.elementhandle._eval",permalink:"/api/puppeteer.elementhandle._eval",draft:!1,unlisted:!1,tags:[],version:"22.8.2",frontMatter:{sidebar_label:"ElementHandle.$eval"},sidebar:"api",previous:{title:"ElementHandle.$$eval",permalink:"/api/puppeteer.elementhandle.__eval"},next:{title:"ElementHandle.autofill",permalink:"/api/puppeteer.elementhandle.autofill"}},d={},c=[{value:"Signature:",id:"signature",level:4},{value:"Parameters",id:"parameters",level:2},{value:"Example",id:"example",level:2}];function o(e){const n={code:"code",h1:"h1",h2:"h2",h4:"h4",p:"p",pre:"pre",strong:"strong",...(0,l.a)(),...e.components};return(0,r.jsxs)(r.Fragment,{children:[(0,r.jsx)(n.h1,{id:"elementhandleeval-method",children:"ElementHandle.$eval() method"}),"\n",(0,r.jsx)(n.p,{children:"Runs the given function on the first element matching the given selector in the current element."}),"\n",(0,r.jsx)(n.p,{children:"If the given function returns a promise, then this method will wait till the promise resolves."}),"\n",(0,r.jsx)(n.h4,{id:"signature",children:"Signature:"}),"\n",(0,r.jsx)(n.pre,{children:(0,r.jsx)(n.code,{className:"language-typescript",children:"class ElementHandle {\n $eval<\n Selector extends string,\n Params extends unknown[],\n Func extends EvaluateFuncWith<NodeFor<Selector>, Params> = EvaluateFuncWith<\n NodeFor<Selector>,\n Params\n >,\n >(\n selector: Selector,\n pageFunction: Func | string,\n ...args: Params\n ): Promise<Awaited<ReturnType<Func>>>;\n}\n"})}),"\n",(0,r.jsx)(n.h2,{id:"parameters",children:"Parameters"}),"\n",(0,r.jsxs)("table",{children:[(0,r.jsx)("thead",{children:(0,r.jsxs)("tr",{children:[(0,r.jsx)("th",{children:(0,r.jsx)(n.p,{children:"Parameter"})}),(0,r.jsx)("th",{children:(0,r.jsx)(n.p,{children:"Type"})}),(0,r.jsx)("th",{children:(0,r.jsx)(n.p,{children:"Description"})})]})}),(0,r.jsxs)("tbody",{children:[(0,r.jsxs)("tr",{children:[(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"selector"})}),(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"Selector"})}),(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"The selector to query for."})})]}),(0,r.jsxs)("tr",{children:[(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"pageFunction"})}),(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"Func | string"})}),(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"The function to be evaluated in this element's page's context. The first element matching the selector will be passed in as the first argument."})})]}),(0,r.jsxs)("tr",{children:[(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"args"})}),(0,r.jsx)("td",{children:(0,r.jsx)(n.p,{children:"Params"})}),(0,r.jsx)("td",{children:(0,r.jsxs)(n.p,{children:["Additional arguments to pass to ",(0,r.jsx)(n.code,{children:"pageFunction"}),"."]})})]})]})]}),"\n",(0,r.jsx)(n.p,{children:(0,r.jsx)(n.strong,{children:"Returns:"})}),"\n",(0,r.jsx)(n.p,{children:"Promise<Awaited<ReturnType<Func>>>"}),"\n",(0,r.jsx)(n.p,{children:"A promise to the result of the function."}),"\n",(0,r.jsx)(n.h2,{id:"example",children:"Example"}),"\n",(0,r.jsx)(n.pre,{children:(0,r.jsx)(n.code,{className:"language-ts",children:"const tweetHandle = await page.$('.tweet');\nexpect(await tweetHandle.$eval('.like', node => node.innerText)).toBe('100');\nexpect(await tweetHandle.$eval('.retweets', node => node.innerText)).toBe('10');\n"})})]})}function h(e={}){const{wrapper:n}={...(0,l.a)(),...e.components};return n?(0,r.jsx)(n,{...e,children:(0,r.jsx)(o,{
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