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Modernizr Unicode character detection plugin

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modernizr.unicode.js
JavaScript
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/**
* Unicode special character support
*
* Detection is made by testing missing glyph box rendering against star character
* If widths are the same, this "probably" means the browser didn't support the star character and rendered a glyph box instead
* Just need to ensure the font characters have different widths
*/
Modernizr.addTest('unicode', function() {
var bool,
 
missingGlyph = document.createElement('span'),
star = document.createElement('span');
 
Modernizr.testStyles('#modernizr{font-family:Arial,sans;}', function(node) {
 
missingGlyph.innerHTML = '&#5987';
star.innerHTML = '&#9734';
node.appendChild(missingGlyph);
node.appendChild(star);
bool = 'offsetWidth' in missingGlyph && missingGlyph.offsetWidth !== star.offsetWidth;
});
 
return bool;
 
});

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