Puppeteer: Unsupported media type:

emulateMediaType receives an unsupported media type.

Error message

Unsupported media type:

How this error happens

Media emulation selects screen, print, or no override. A responsive breakpoint such as mobile is not a media type.

The snippets use an open Puppeteer page named page.

await page.emulateMediaType(
    "mobile"
);

How to fix

Choose a supported media type. Change the viewport separately if you want to test a small screen.

await page.emulateMediaType(
    "screen"
);

await page.setViewport({
    width: 390,
    height: 844,
});

Things to keep in mind

Pass null to stop emulating a media type.

All Puppeteer errors