Input polyfill.
The polyfill will add unique classes to an input field when it is focused
focus. Also allows the placeholder attribute to work on browsers that
do not support the attribute. Adds js-input-placeholder so styling can be done to
the placeholder attribute.
Example
The script is initialized on page load, but if new <input type="text" />
added to the page dynamically. Use the line below:
ML.InputControl();