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.

Specifications

Specification Status Comment
HTML Living Standard
The definition of 'preconnect' in that specification.
Living Standard

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
preconnect
Experimental
Chrome Full support 46Edge Full support 79Firefox Full support 39
Notes
Full support 39
Notes
Notes Before Firefox 41, it doesn't obey the crossorigin attribute.
IE No support NoOpera Full support 33Safari Full support 11.1WebView Android Full support 46Chrome Android Full support 46Firefox Android Full support 39
Notes
Full support 39
Notes
Notes Before Firefox 41, it doesn't obey the crossorigin attribute.
Opera Android Full support 33Safari iOS Full support 11.3Samsung Internet Android Full support 4.0

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.