mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
2 lines
5.5 KiB
JavaScript
2 lines
5.5 KiB
JavaScript
/*! For license information please see 280ccbb6.4c1b9fc6.js.LICENSE.txt */
|
|
"use strict";(self.webpackChunkwebsite=self.webpackChunkwebsite||[]).push([[54554],{48080:(e,n,t)=>{t.r(n),t.d(n,{assets:()=>l,contentTitle:()=>i,default:()=>p,frontMatter:()=>s,metadata:()=>o,toc:()=>c});var r=t(85893),a=t(11151);const s={sidebar_label:"Page.evaluateOnNewDocument"},i="Page.evaluateOnNewDocument() method",o={id:"api/puppeteer.page.evaluateonnewdocument",title:"Page.evaluateOnNewDocument() method",description:"Adds a function which would be invoked in one of the following scenarios:",source:"@site/versioned_docs/version-22.6.4/api/puppeteer.page.evaluateonnewdocument.md",sourceDirName:"api",slug:"/api/puppeteer.page.evaluateonnewdocument",permalink:"/api/puppeteer.page.evaluateonnewdocument",draft:!1,unlisted:!1,tags:[],version:"22.6.4",frontMatter:{sidebar_label:"Page.evaluateOnNewDocument"},sidebar:"api",previous:{title:"Page.evaluateHandle",permalink:"/api/puppeteer.page.evaluatehandle"},next:{title:"Page.exposeFunction",permalink:"/api/puppeteer.page.exposefunction"}},l={},c=[{value:"Signature:",id:"signature",level:4},{value:"Parameters",id:"parameters",level:2},{value:"Example",id:"example",level:2}];function d(e){const n={a:"a",code:"code",h1:"h1",h2:"h2",h4:"h4",li:"li",p:"p",pre:"pre",strong:"strong",ul:"ul",...(0,a.a)(),...e.components};return(0,r.jsxs)(r.Fragment,{children:[(0,r.jsx)(n.h1,{id:"pageevaluateonnewdocument-method",children:"Page.evaluateOnNewDocument() method"}),"\n",(0,r.jsx)(n.p,{children:"Adds a function which would be invoked in one of the following scenarios:"}),"\n",(0,r.jsxs)(n.ul,{children:["\n",(0,r.jsxs)(n.li,{children:["\n",(0,r.jsx)(n.p,{children:"whenever the page is navigated"}),"\n"]}),"\n",(0,r.jsxs)(n.li,{children:["\n",(0,r.jsx)(n.p,{children:"whenever the child frame is attached or navigated. In this case, the function is invoked in the context of the newly attached frame."}),"\n"]}),"\n"]}),"\n",(0,r.jsxs)(n.p,{children:["The function is invoked after the document was created but before any of its scripts were run. This is useful to amend the JavaScript environment, e.g. to seed ",(0,r.jsx)(n.code,{children:"Math.random"}),"."]}),"\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 Page {\n abstract evaluateOnNewDocument<\n Params extends unknown[],\n Func extends (...args: Params) => unknown = (...args: Params) => unknown,\n >(\n pageFunction: Func | string,\n ...args: Params\n ): Promise<NewDocumentScriptEvaluation>;\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:"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:"Function to be evaluated in browser context"})})]}),(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:["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.jsxs)(n.p,{children:["Promise<",(0,r.jsx)(n.a,{href:"/api/puppeteer.newdocumentscriptevaluation",children:"NewDocumentScriptEvaluation"}),">"]}),"\n",(0,r.jsx)(n.h2,{id:"example",children:"Example"}),"\n",(0,r.jsx)(n.p,{children:"An example of overriding the navigator.languages property before the page loads:"}),"\n",(0,r.jsx)(n.pre,{children:(0,r.jsx)(n.code,{className:"language-ts",children:"// preload.js\n\n// overwrite the `languages` property to use a custom getter\nObject.defineProperty(navigator, 'languages', {\n get: function () {\n return ['en-US', 'en', 'bn'];\n },\n});\n\n// In your puppeteer script, assuming the preload.js file is\n// in same folder of our script.\nconst preloadFile = fs.readFileSync('./preload.js', 'utf8');\nawait page.evaluateOnNewDocument(preloadFile);\n"})})]})}function p(e={}){const{wrapper:n}={...(0,a.a)(),...e.components};return n?(0,r.jsx)(n,{...e,children:(0,r.jsx)(d,{...e})}):d(e)}},75251:(e,n,t)=>{var r=t(67294),a=Symbol.for("react.element"),s=Symbol.for("react.fragment"),i=Object.prototype.hasOwnProperty,o=r.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED.ReactCurrentOwner,l={key:!0,ref:!0,__self:!0,__source:!0};function c(e,n,t){var r,s={},c=null,d=null;for(r in void 0!==t&&(c=""+t),void 0!==n.key&&(c=""+n.key),void 0!==n.ref&&(d=n.ref),n)i.call(n,r)&&!l.hasOwnProperty(r)&&(s[r]=n[r]);if(e&&e.defaultProps)for(r in n=e.defaultProps)void 0===s[r]&&(s[r]=n[r]);return{$$typeof:a,type:e,key:c,ref:d,props:s,_owner:o.current}}n.Fragment=s,n.jsx=c,n.jsxs=c},85893:(e,n,t)=>{e.exports=t(75251)},11151:(e,n,t)=>{t.d(n,{Z:()=>o,a:()=>i});var r=t(67294);const a={},s=r.createContext(a);function i(e){const n=r.useContext(s);return r.useMemo((function(){return"function"==typeof e?e(n):{...n,...e}}),[n,e])}function o(e){let n;return n=e.disableParentContext?"function"==typeof e.components?e.components(a):e.components||a:i(e.components),r.createElement(s.Provider,{value:n},e.children)}}}]); |