puppeteer/docs/api/puppeteer.page.emulatemediatype.md
dependabot[bot] 93e9acc410
chore(deps-dev): Bump the dev-dependencies group with 3 updates (#12101)
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Co-authored-by: Nikolay Vitkov <nvitkov@chromium.org>
2024-03-20 15:03:14 +00:00

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Page.emulateMediaType

Page.emulateMediaType() method

Signature:

class Page {
  abstract emulateMediaType(type?: string): Promise<void>;
}

Parameters

Parameter

Type

Description

type

string

(Optional) Changes the CSS media type of the page. The only allowed values are screen, print and null. Passing null disables CSS media emulation.

**Returns:**

Promise<void>

Example

await page.evaluate(() => matchMedia('screen').matches);
// → true
await page.evaluate(() => matchMedia('print').matches);
// → false

await page.emulateMediaType('print');
await page.evaluate(() => matchMedia('screen').matches);
// → false
await page.evaluate(() => matchMedia('print').matches);
// → true

await page.emulateMediaType(null);
await page.evaluate(() => matchMedia('screen').matches);
// → true
await page.evaluate(() => matchMedia('print').matches);
// → false