Architecture/best practices review for javascript component framework

I'm working with a component "architecture"/"framework" (not mine) and need some feedback on it - specifically whether it violates any best practices in the programming/architecture world. Also, why it is better/worse than another version.

Here is a sample bit of code: HTML:

<form data-renderer='formrenderer'>
    <div data-renderer='hformitem'>
       <input data-renderer='numberinput' data-id='theInput' data-label='some.key.to.translate' data-required='true' data-max='9999' data-min='0' data-name='someName' type='text'>
    </div>
</form>
<button data-renderer='bigbutton' data-id='theButton' data-role='primary' data-background='black' data-text='some.key.to.translate'></button>

This HTML is sent to a 'parser' that replaces all of the pieces that have 'data-renderer' with 'enhanced' versions. Later, to get/set values...

JS:

var inputComponent = someContext.getComponent('theInput');
inputComponent.setValue('foo');
inputComponent.getValue(); //would return foo

The simplified version is: HTML:

<form>
    <div class='form-item required'>
        <label for='theInput'>{{i18n "some.key.to.translate"}}</label>
        <input type='number' max='9999' min='0' name='theInput' id='theInput'/>
    </div>
</form>
<button class='primary important'>{{i18n "some.key.to.translate"}}</button>

And the JS..

$("#theInput").val(); //setter/getter of course.