This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The FontFaceSetLoadEvent constructor creates a new FontFaceLoadEvent object which is fired whenever a FontFaceSet loads.


var fontFaceSetLoadEvent = new FontFaceSetLoadEvent(type[, options])


The literal value 'Type' (quotation marks included).
options Optional
Options are as follows:
  • fontfaces: An array of FontFace instances.


Specification Status Comment
CSS Font Loading Module Level 3
The definition of 'FontFaceSetLoadEvent' in that specification.
Working Draft Initial definition.

Browser Compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Chrome Full support 57Edge ? Firefox ? IE ? Opera Full support 44Safari ? WebView Android No support NoChrome Android Full support 57Edge Mobile ? Firefox Android ? Opera Android Full support 44Safari iOS ? Samsung Internet Android Full support 7.0


Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

Document Tags and Contributors

Contributors to this page: fscholz, jpmedley
Last updated by: fscholz,