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method Page.prototype.emulateVisionDeficiency
Re-export
import { Page } from "https://deno.land/x/fresh@1.6.7/tests/deps.ts";

Simulates the given vision deficiency on the page.

Examples

Example 1

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://v8.dev/blog/10-years');

  await page.emulateVisionDeficiency('achromatopsia');
  await page.screenshot({path: 'achromatopsia.png'});

  await page.emulateVisionDeficiency('deuteranopia');
  await page.screenshot({path: 'deuteranopia.png'});

  await page.emulateVisionDeficiency('blurredVision');
  await page.screenshot({path: 'blurred-vision.png'});

  await browser.close();
})();

Parameters

optional
type: Protocol.Emulation.SetEmulatedVisionDeficiencyRequest["type"]
  • the type of deficiency to simulate, or 'none' to reset.

Returns

Promise<void>