mirror of
https://github.com/puppeteer/puppeteer
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2 lines
6.0 KiB
JavaScript
2 lines
6.0 KiB
JavaScript
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/*! For license information please see 05aee0c6.f5ee8df0.js.LICENSE.txt */
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"use strict";(self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[54409],{40549:(e,t,r)=>{r.r(t),r.d(t,{assets:()=>i,contentTitle:()=>o,default:()=>p,frontMatter:()=>n,metadata:()=>c,toc:()=>l});var s=r(85893),a=r(11151);const n={sidebar_label:"Coverage"},o="Coverage class",c={id:"api/puppeteer.coverage",title:"Coverage class",description:"The Coverage class provides methods to gather information about parts of JavaScript and CSS that were used by the page.",source:"@site/../docs/api/puppeteer.coverage.md",sourceDirName:"api",slug:"/api/puppeteer.coverage",permalink:"/next/api/puppeteer.coverage",draft:!1,unlisted:!1,tags:[],version:"current",frontMatter:{sidebar_label:"Coverage"},sidebar:"api",previous:{title:"CDPSession.send",permalink:"/next/api/puppeteer.cdpsession.send"},next:{title:"Coverage.(constructor)",permalink:"/next/api/puppeteer.coverage._constructor_"}},i={},l=[{value:"Signature:",id:"signature",level:4},{value:"Remarks",id:"remarks",level:2},{value:"Example",id:"example",level:2},{value:"Constructors",id:"constructors",level:2},{value:"Methods",id:"methods",level:2}];function d(e){const t={a:"a",code:"code",h1:"h1",h2:"h2",h4:"h4",p:"p",pre:"pre",table:"table",tbody:"tbody",td:"td",th:"th",thead:"thead",tr:"tr",...(0,a.a)(),...e.components};return(0,s.jsxs)(s.Fragment,{children:[(0,s.jsx)(t.h1,{id:"coverage-class",children:"Coverage class"}),"\n",(0,s.jsx)(t.p,{children:"The Coverage class provides methods to gather information about parts of JavaScript and CSS that were used by the page."}),"\n",(0,s.jsx)(t.h4,{id:"signature",children:"Signature:"}),"\n",(0,s.jsx)(t.pre,{children:(0,s.jsx)(t.code,{className:"language-typescript",children:"export declare class Coverage\n"})}),"\n",(0,s.jsx)(t.h2,{id:"remarks",children:"Remarks"}),"\n",(0,s.jsxs)(t.p,{children:["To output coverage in a form consumable by ",(0,s.jsx)(t.a,{href:"https://github.com/istanbuljs",children:"Istanbul"}),", see ",(0,s.jsx)(t.a,{href:"https://github.com/istanbuljs/puppeteer-to-istanbul",children:"puppeteer-to-istanbul"}),"."]}),"\n",(0,s.jsx)(t.h2,{id:"example",children:"Example"}),"\n",(0,s.jsx)(t.p,{children:"An example of using JavaScript and CSS coverage to get percentage of initially executed code:"}),"\n",(0,s.jsx)(t.pre,{children:(0,s.jsx)(t.code,{className:"language-ts",children:"// Enable both JavaScript and CSS coverage\nawait Promise.all([\n page.coverage.startJSCoverage(),\n page.coverage.startCSSCoverage(),\n]);\n// Navigate to page\nawait page.goto('https://example.com');\n// Disable both JavaScript and CSS coverage\nconst [jsCoverage, cssCoverage] = await Promise.all([\n page.coverage.stopJSCoverage(),\n page.coverage.stopCSSCoverage(),\n]);\nlet totalBytes = 0;\nlet usedBytes = 0;\nconst coverage = [...jsCoverage, ...cssCoverage];\nfor (const entry of coverage) {\n totalBytes += entry.text.length;\n for (const range of entry.ranges) usedBytes += range.end - range.start - 1;\n}\nconsole.log(`Bytes used: ${(usedBytes / totalBytes) * 100}%`);\n"})}),"\n",(0,s.jsx)(t.h2,{id:"constructors",children:"Constructors"}),"\n",(0,s.jsxs)(t.table,{children:[(0,s.jsx)(t.thead,{children:(0,s.jsxs)(t.tr,{children:[(0,s.jsx)(t.th,{children:"Constructor"}),(0,s.jsx)(t.th,{children:"Modifiers"}),(0,s.jsx)(t.th,{children:"Description"})]})}),(0,s.jsx)(t.tbody,{children:(0,s.jsxs)(t.tr,{children:[(0,s.jsx)(t.td,{children:(0,s.jsx)(t.a,{href:"/next/api/puppeteer.coverage._constructor_",children:"(constructor)(client)"})}),(0,s.jsx)(t.td,{}),(0,s.jsxs)(t.td,{children:["Constructs a new instance of the ",(0,s.jsx)("code",{children:"Coverage"})," class"]})]})})]}),"\n",(0,s.jsx)(t.h2,{id:"methods",children:"Methods"}),"\n",(0,s.jsxs)(t.table,{children:[(0,s.jsx)(t.thead,{children:(0,s.jsxs)(t.tr,{children:[(0,s.jsx)(t.th,{children:"Method"}),(0,s.jsx)(t.th,{children:"Modifiers"}),(0,s.jsx)(t.th,{children:"Description"})]})}),(0,s.jsxs)(t.tbody,{children:[(0,s.jsxs)(t.tr,{children:[(0,s.jsx)(t.td,{children:(0,s.jsx)(t.a,{href:"/next/api/puppeteer.coverage.startcsscoverage",children:"startCSSCoverage(options)"})}),(0,s.jsx)(t.
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