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🤖 I have created a release *beep* *boop* --- <details><summary>puppeteer: 19.4.0</summary> ## [19.4.0](https://github.com/puppeteer/puppeteer/compare/puppeteer-v19.3.0...puppeteer-v19.4.0) (2022-12-07) ### Features * **chromium:** roll to Chromium 109.0.5412.0 (r1069273) ([#9364](https://github.com/puppeteer/puppeteer/issues/9364)) ([1875da6](1875da6191)), closes [#9233](https://github.com/puppeteer/puppeteer/issues/9233) ### Dependencies * The following workspace dependencies were updated * dependencies * puppeteer-core bumped from 19.3.0 to 19.4.0 </details> <details><summary>puppeteer-core: 19.4.0</summary> ## [19.4.0](https://github.com/puppeteer/puppeteer/compare/puppeteer-core-v19.3.0...puppeteer-core-v19.4.0) (2022-12-07) ### Features * ability to send headers via ws connection to browser in node.js environment ([#9314](https://github.com/puppeteer/puppeteer/issues/9314)) ([937fffa](937fffaedc)), closes [#7218](https://github.com/puppeteer/puppeteer/issues/7218) * **chromium:** roll to Chromium 109.0.5412.0 (r1069273) ([#9364](https://github.com/puppeteer/puppeteer/issues/9364)) ([1875da6](1875da6191)), closes [#9233](https://github.com/puppeteer/puppeteer/issues/9233) * **puppeteer-core:** keydown supports commands ([#9357](https://github.com/puppeteer/puppeteer/issues/9357)) ([b7ebc5d](b7ebc5d9bb)) ### Bug Fixes * **puppeteer-core:** avoid type instantiation errors ([#9370](https://github.com/puppeteer/puppeteer/issues/9370)) ([17f31a9](17f31a9ee4)), closes [#9369](https://github.com/puppeteer/puppeteer/issues/9369) </details> --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
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| Page.emulateMediaFeatures |
Page.emulateMediaFeatures() method
Signature:
class Page {
emulateMediaFeatures(features?: MediaFeature[]): Promise<void>;
}
Parameters
| Parameter | Type | Description |
|---|---|---|
| features | MediaFeature[] | (Optional) <?Array<Object>> Given an array of media feature objects, emulates CSS media features on the page. Each media feature object must have the following properties: |
Returns:
Promise<void>
Example
await page.emulateMediaFeatures([
{name: 'prefers-color-scheme', value: 'dark'},
]);
await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
// → true
await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
// → false
await page.emulateMediaFeatures([
{name: 'prefers-reduced-motion', value: 'reduce'},
]);
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: reduce)').matches
);
// → true
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: no-preference)').matches
);
// → false
await page.emulateMediaFeatures([
{name: 'prefers-color-scheme', value: 'dark'},
{name: 'prefers-reduced-motion', value: 'reduce'},
]);
await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
// → true
await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
// → false
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: reduce)').matches
);
// → true
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: no-preference)').matches
);
// → false
await page.emulateMediaFeatures([{name: 'color-gamut', value: 'p3'}]);
await page.evaluate(() => matchMedia('(color-gamut: srgb)').matches);
// → true
await page.evaluate(() => matchMedia('(color-gamut: p3)').matches);
// → true
await page.evaluate(() => matchMedia('(color-gamut: rec2020)').matches);
// → false