Observes this form field and submits the form when its value changes.
Both the form and the changed field will be assigned a CSS class
while the autosubmitted form is loading.
The programmatic variant of this is the
The following would automatically submit the form when the query is changed:
<form method="GET" action="/search"> <input type="search" name="query" up-autosubmit> <input type="checkbox" name="archive"> Include archive </form>
The number of miliseconds to wait after a change before the form is submitted.