Link

manifest

Links the page to a web app manifest, a JSON document that describes properties such as the app name, icons, display mode, scope, and start URL.

Code examples

<link rel="manifest" href="/app.webmanifest">

Links to a same-origin web app manifest. A relative URL is valid here.

<link rel="manifest">

Has no href, so the browser cannot fetch a manifest.

01
Serve valid JSON
A syntax error or invalid member can stop some or all of the manifest from being applied. Check the parsed manifest in browser developer tools.
02
Set scope deliberately
Keep start_url within scope. Otherwise the user agent falls back to the document URL when it processes the manifest.
03
Use crossorigin for credentials
If a cross-origin manifest needs cookies or HTTP authentication, set crossorigin="use-credentials" and configure the server's CORS response.