mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
51 lines
1.4 KiB
Markdown
51 lines
1.4 KiB
Markdown
---
|
|
sidebar_label: Page.emulateVisionDeficiency
|
|
---
|
|
|
|
# Page.emulateVisionDeficiency() method
|
|
|
|
Simulates the given vision deficiency on the page.
|
|
|
|
**Signature:**
|
|
|
|
```typescript
|
|
class Page {
|
|
emulateVisionDeficiency(
|
|
type?: Protocol.Emulation.SetEmulatedVisionDeficiencyRequest['type']
|
|
): Promise<void>;
|
|
}
|
|
```
|
|
|
|
## Parameters
|
|
|
|
| Parameter | Type | Description |
|
|
| --------- | --------------------------------------------------------------- | -------------------------------------------------------------------------------------- |
|
|
| type | Protocol.Emulation.SetEmulatedVisionDeficiencyRequest\['type'\] | <i>(Optional)</i> the type of deficiency to simulate, or <code>'none'</code> to reset. |
|
|
|
|
**Returns:**
|
|
|
|
Promise<void>
|
|
|
|
## Example
|
|
|
|
```ts
|
|
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();
|
|
})();
|
|
```
|