Community Learn Tools Library Leisure
search
English
Home > Web Front-end > JS Tutorial > body text

How to Enforce Selection in HTML `` Fields with the `required` Attribute?

Patricia Arquette
Release： 2024-11-03 06:18:30
Original
1046 people have browsed it

How to Enforce Selection in HTML `` Fields with the `required` Attribute?

HTML fields in HTML, it's possible to enforce selection using this attribute with some specific HTML structure.

The requirement involves having the first value in the fields with empty first values will be treated as optional. However, by setting required on the field, it becomes mandatory to make a selection.

Here's an example of how to use it:

<code class="html"><select name="somename" required>
    <option value="">Please select</option>
    <option value="one">One</option>
</select></code>
Copy after login

According to the HTML5 specification, this structure satisfies the criteria for mandatory selection:

  • required attribute is specified.
  • The element (not part of an optgroup).

By adhering to these conditions, the required attribute becomes functional for