When was the full support for the numeric weight font added to each browser? In particular: IE, FireFox, Chrome, Safari, iOS Safari, Android Browser.
I know that all browsers support boldand normal, but I could not find an updated list of browsers that fully support the numeric values for the font CSS-weighted property. The only information I found is that font-weight still doesn't work . It shows most browsers at a time when it wasn’t able to display numerical weights correctly, but from 2009 until IE8 was released.
Example:
<link href='http://fonts.googleapis.com/css?family=Roboto:300,400,700' rel='stylesheet' type='text/css'>
<style>
body { font-family: 'Roboto', sans-serif; }
.light { font-weight:300 }
.normal { font-weight:400 }
.bold { font-weight:700 }
</style>