Just a random idea. It would be nice to have an attribute for form elements that would prevent their data from being sent by the form when they are left unchanged.

<form method="post" action="./save">
<textarea name="article" disabledifunchanged>foo</textarea>
<button>Save</button>
</form>

if textarea.value === textarea.defaultValue is true, no "&article=" get/post variable will be sent by the form.

this is especially useful for data-tables containing lot of form inputs which unlikely will be all modified. so why not submitting only those that were actually changed? improves also bandwidth usage, simplifies the work of server-side form handlers and reduces the risk of errors since less work must be handled and performed.

hope you like the idea