I needed to add a placeholder to a number input. Apparently this is only supported in Chrome.
The solution I found was to start with a text input with a placeholder and then on focus change it to a number.
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<input placeholder="Amount" onfocus="this.type = 'number';">
So it will now have a placeholder until the input comes into focus.
Related External Links:
- [Stack Overflow - how-to-display-placeholders-text-in-html5s-number-typed-input](http://stackoverflow.com/questions/7401495/how-to-display-placeholders-text-in-html5s-number-typed-input)