puppeteer/assets/js/804f8141.eb359b86.js

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puppeteer &gt; Page &gt; emulateVisionDeficiency",source:"@site/versioned_docs/version-10.1.0/puppeteer.page.emulatevisiondeficiency.md",sourceDirName:".",slug:"/puppeteer.page.emulatevisiondeficiency",permalink:"/puppeteer/docs/puppeteer.page.emulatevisiondeficiency",editUrl:"https://github.com/facebook/puppeteer/edit/main/website/versioned_docs/version-10.1.0/puppeteer.page.emulatevisiondeficiency.md",version:"10.1.0",frontMatter:{},sidebar:"version-10.1.0/docs",previous:{title:"puppeteer.page.emulatetimezone",permalink:"/puppeteer/docs/puppeteer.page.emulatetimezone"},next:{title:"puppeteer.page.evaluate",permalink:"/puppeteer/docs/puppeteer.page.evaluate"}},l=[{value:"Page.emulateVisionDeficiency() method",id:"pageemulatevisiondeficiency-method",children:[]},{value:"Parameters",id:"parameters",children:[]},{value:"Example",id:"example",children:[]}],s={toc:l};function m(e){var t=e.components,n=(0,a.Z)(e,p);return(0,i.kt)("wrapper",(0,r.Z)({},s,n,{components:t,mdxType:"MDXLayout"}),(0,i.kt)("p",null,(0,i.kt)("a",{parentName:"p",href:"/puppeteer/docs/index"},"Home")," ",">"," ",(0,i.kt)("a",{parentName:"p",href:"/puppeteer/docs/puppeteer"},"puppeteer")," ",">"," ",(0,i.kt)("a",{parentName:"p",href:"/puppeteer/docs/puppeteer.page"},"Page")," ",">"," ",(0,i.kt)("a",{parentName:"p",href:"/puppeteer/docs/puppeteer.page.emulatevisiondeficiency"},"emulateVisionDeficiency")),(0,i.kt)("h2",{id:"pageemulatevisiondeficiency-method"},"Page.emulateVisionDeficiency() method"),(0,i.kt)("p",null,"Simulates the given vision deficiency on the page."),(0,i.kt)("b",null,"Signature:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-typescript"},"emulateVisionDeficiency(type?: Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']): Promise<void>;\n")),(0,i.kt)("h2",{id:"parameters"},"Parameters"),(0,i.kt)("table",null,(0,i.kt)("thead",{parentName:"table"},(0,i.kt)("tr",{parentName:"thead"},(0,i.kt)("th",{parentName:"tr",align:null},"Parameter"),(0,i.kt)("th",{parentName:"tr",align:null},"Type"),(0,i.kt)("th",{parentName:"tr",align:null},"Description"))),(0,i.kt)("tbody",{parentName:"table"},(0,i.kt)("tr",{parentName:"tbody"},(0,i.kt)("td",{parentName:"tr",align:null},"type"),(0,i.kt)("td",{parentName:"tr",align:null},"Protocol.Emulation.SetEmulatedVisionDeficiencyRequest","[","'type'","]"),(0,i.kt)("td",{parentName:"tr",align:null},"the type of deficiency to simulate, or ",(0,i.kt)("code",null,"'none'")," to reset.")))),(0,i.kt)("b",null,"Returns:"),(0,i.kt)("p",null,"Promise","<","void",">"),(0,i.kt)("h2",{id:"example"},"Example"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-js"},"const puppeteer = require('puppeteer');\n\n(async () => {\n  const browser = await puppeteer.launch();\n  const page = await browser.newPage();\n  await page.goto('https://v8.dev/blog/10-years');\n\n  await page.emulateVisionDeficiency('achromatopsia');\n  await page.screenshot({ path: 'achromatopsia.png' });\n\n  await page.emulateVisionDeficiency('deuteranopia');\n  await page.screenshot({ path: 'deuteranopia.png' });\n\n  await page.emulateVisionDeficiency('blurredVision');\n  await page.screenshot({ path: 'blurred-vision.png' });\n\n  await browser.close();\n})();\n\n")))}m.isMDXComponent=!0}}]);