up.form
[up-switch]
HTML selector
Controls the state of another element when this field changes.
Example
The controlling form field gets an [up-switch] attribute with a selector for the elements to show or hide:
<select name="level" up-switch=".level-dependent">
<option value="beginner">beginner</option>
<option value="intermediate">intermediate</option>
<option value="expert">expert</option>
</select>
The target elements can choose how to alter their state after the controlling field changes.
For example, the [up-show-for] will show an element while the field has one of the given values:
<div class="level-dependent" up-show-for="beginner"> <!-- mark: up-show-for -->
shown for beginner level, hidden for other levels
</div>
There are other attributes like [up-hide-for], [up-disable-for] or [up-enable-for].
You can also implement custom switching effects.
Modifying attributes
Dependencies
A CSS selector for elements whose state depends on this field's value.
A selector for the region in which elements are switched.
By default all matching elements within the form are switched. You can expand or narrow the search scope by configuring a different selector.
Observed events
The type of event to watch.
The number of milliseconds to wait after a change.
This can be used to batch multiple events within a short time span. See debouncing callbacks.