docs/api/puppeteer.page.emulatevisiondeficiency.md
Simulates the given vision deficiency on the page.
class Page {
abstract emulateVisionDeficiency(
type?: Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type'],
): Promise<void>;
}
Parameter
</th><th>Type
</th><th>Description
</th></tr></thead> <tbody><tr><td>type
</td><td>Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']
</td><td>(Optional) the type of deficiency to simulate, or 'none' to reset.
Returns:
Promise<void>
import puppeteer from 'puppeteer';
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 page.emulateVisionDeficiency('reducedContrast');
await page.screenshot({path: 'reduced-contrast.png'});
await browser.close();