72 lines
2.0 KiB
Markdown
72 lines
2.0 KiB
Markdown
---
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sidebar_label: Page.emulateMediaFeatures
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---
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# Page.emulateMediaFeatures() method
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**Signature:**
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```typescript
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class Page {emulateMediaFeatures(features?: MediaFeature[]): Promise<void>;}
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```
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## Parameters
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| Parameter | Type | Description |
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| --- | --- | --- |
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| features | [MediaFeature](./puppeteer.mediafeature.md)\[\] | <i>(Optional)</i> <code><?Array<Object>></code> Given an array of media feature objects, emulates CSS media features on the page. Each media feature object must have the following properties: |
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**Returns:**
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Promise<void>
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## Example
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```ts
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await page.emulateMediaFeatures([
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{ name: 'prefers-color-scheme', value: 'dark' },
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]);
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await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
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// → true
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await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
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// → false
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await page.emulateMediaFeatures([
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{ name: 'prefers-reduced-motion', value: 'reduce' },
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]);
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await page.evaluate(
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() => matchMedia('(prefers-reduced-motion: reduce)').matches
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);
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// → true
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await page.evaluate(
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() => matchMedia('(prefers-reduced-motion: no-preference)').matches
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);
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// → false
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await page.emulateMediaFeatures([
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{ name: 'prefers-color-scheme', value: 'dark' },
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{ name: 'prefers-reduced-motion', value: 'reduce' },
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]);
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await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
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// → true
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await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
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// → false
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await page.evaluate(
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() => matchMedia('(prefers-reduced-motion: reduce)').matches
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);
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// → true
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await page.evaluate(
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() => matchMedia('(prefers-reduced-motion: no-preference)').matches
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);
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// → false
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await page.emulateMediaFeatures([{ name: 'color-gamut', value: 'p3' }]);
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await page.evaluate(() => matchMedia('(color-gamut: srgb)').matches);
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// → true
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await page.evaluate(() => matchMedia('(color-gamut: p3)').matches);
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// → true
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await page.evaluate(() => matchMedia('(color-gamut: rec2020)').matches);
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// → false
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```
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