puppeteer/assets/js/2cccce35.439863e3.js

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page."),(0,a.kt)("h4",r({},{id:"signature"}),"Signature:"),(0,a.kt)("pre",null,(0,a.kt)("code",r({parentName:"pre"},{className:"language-typescript"}),"class Page {\n  abstract emulateVisionDeficiency(\n    type?: Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']\n  ): Promise<void>;\n}\n")),(0,a.kt)("h2",r({},{id:"parameters"}),"Parameters"),(0,a.kt)("table",null,(0,a.kt)("thead",{parentName:"table"},(0,a.kt)("tr",{parentName:"thead"},(0,a.kt)("th",r({parentName:"tr"},{align:null}),"Parameter"),(0,a.kt)("th",r({parentName:"tr"},{align:null}),"Type"),(0,a.kt)("th",r({parentName:"tr"},{align:null}),"Description"))),(0,a.kt)("tbody",{parentName:"table"},(0,a.kt)("tr",{parentName:"tbody"},(0,a.kt)("td",r({parentName:"tr"},{align:null}),"type"),(0,a.kt)("td",r({parentName:"tr"},{align:null}),"Protocol.Emulation.SetEmulatedVisionDeficiencyRequest","[","'type'","]"),(0,a.kt)("td",r({parentName:"tr"},{align:null}),(0,a.kt)("em",{parentName:"td"},"(Optional)")," the type of deficiency to simulate, or ",(0,a.kt)("code",null,"'none'")," to reset.")))),(0,a.kt)("p",null,(0,a.kt)("strong",{parentName:"p"},"Returns:")),(0,a.kt)("p",null,"Promise","<","void",">"),(0,a.kt)("h2",r({},{id:"example"}),"Example"),(0,a.kt)("pre",null,(0,a.kt)("code",r({parentName:"pre"},{className:"language-ts"}),"import puppeteer from '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")))}m.isMDXComponent=!0}}]);