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Page.emulateVisionDeficiency() method

Simulates the given vision deficiency on the page.

Signature:

class Page {
abstract emulateVisionDeficiency(
type?: Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']
): Promise<void>;
}

Parameters

Parameter

Type

Description

type

Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']

(Optional) the type of deficiency to simulate, or 'none' to reset.

Returns:

Promise<void>

Example

import puppeteer from '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();
})();