tfontfaceobserver

tfontfaceobserver is the rewritten version of fontfaceobserver with the typescript

Supported Browers

tfontfaceobserver supports these browers: Chrome 35+, Edge 79+, Firefox 41+, Opera 35+, Safari 11+, WebView Android 37+, Chrome Android 35+, Firefox for Android 41+, Opera Android 35+, Safari on iOS 11+, Samsung Internet 4.0+.

Due to use FontFaceSet, tfontfaceobserver doesn't support IE. if you want to use IE, please use fontloader as profill(but i never test this profill).