FontLoader

The FontLoader detects when web fonts specified in the fontFamiliesArray array were loaded and rendered. Then it notifies the delegate object via fontLoaded and fontsLoaded methods when specific or all fonts were loaded respectively. The use of this functions implies that the insertion of specified web fonts into the document is done elsewhere.

The FontLoader detects when web fonts are loaded and ready for display without using any timeouts to poll for element dimensions like it is done traditionally (except when used in IE). Instead it utilizes the "scroll" event to receive an instantaneous notification when element size is changed. In addition it utilizes AdobeBlank font to eliminate known issues related to metric compatible fonts.

More info on how FontLoader works can be found here.

The FontLoader(fontFamiliesArray, delegate, timeout) constructor receives three parameters:

1. fontFamiliesArray Array of font-family strings.
2. delegate The delegate object with two optional methods which are invoked in the context of the object.
3. timeout Optional timeout in milliseconds, default is 3000. Pass "null" to not to set any timeout.

Example

var fontLoader = new FontLoader(["font family 1", "font family 2", "font family 3"], {
    "fontLoaded": function(fontFamily) {
		console.log("font loaded: " + fontFamily);
	},
    "fontsLoaded": function(error) {
        if (error !== null) {
            // Reached the timeout but not all fonts were loaded
            console.log(error.message);
            console.log(error.notLoadedFontFamilies);
        } else {
            // All fonts were loaded
        }
	}
}, 3000);
fontLoader.loadFonts();