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Link types: preconnect

The preconnect keyword for the rel attribute of the <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively initiating a connection to that origin.

<link rel="preconnect" href="https://example.com">

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
preconnect
46
79
39
Before Firefox 41, it doesn't obey the crossorigin attribute.
No
33
11.1
46
46
39
Before Firefox 41, it doesn't obey the crossorigin attribute.
33
11.3
4.0

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https://developer.mozilla.org/en-US/docs/Web/HTML/Link_types/preconnect