:in-range and :out-of-range CSS pseudo-classes

If a temporal or number `<input>` has `max` and/or `min` attributes, then `:in-range` matches when the value is within the specified range and `:out-of-range` matches when the value is outside the specified range. If there are no range constraints, then neither pseudo-class matches.

Datalist element

Method of setting a list of options for a user to select in a text field, while leaving the ability to enter a custom value.

autocomplete attribute: on & off values

The `autocomplete` attribute for `input` elements indicates to the browser whether a value should or should not be autofilled when appropriate.

input event

The `input` event is fired when the user changes the value of an `<input>` element, `<select>` element, or `<textarea>` element. By contrast, the "change" event usually only fires after the form control has lost focus.

Range input type

Form field type that allows the user to select a value using a slider widget.

readonly attribute of input and textarea elements

Makes the form control non-editable. Unlike the `disabled` attribute, `readonly` form controls are still included in form submissions and the user can still select (but not edit) their value text.

htmlinputelement api: defaultvalue

htmlinputelement api: value

htmlinputelement api: valueasdate

htmlinputelement api: valueasnumber

midiinputmap api: values

xrinputsourcearray api: values