Use the select element to add multiple attributes to create a multi-select drop-down box. The user presses the Ctrl or Shift key to select multiple options, displays multiple lines through the size attribute, and submits the selected value in conjunction with the name attribute array format.
To create a multi-select dropdown in HTML, use the select element with the multiple attribute. This allows users to select more than one option from the list.
Basic Multi-Select Dropdown
Add the multiple attribute to the select tag. Users can select multiple options by holding down the Ctrl (or Cmd on Mac) key while clicking, or by using Shift to select a range.
Example:
Set Size to Show Multiple Rows
By default, the dropdown may show only one row. Use the size attribute to display several options at once, making it easier to see and select multiple items.
Example:
Styling and Usability Tips
The default appearance can be improved with CSS. You can also add a label to make it accessible.
- Wrap the select in a label or use the for and id attributes
- Set a helpful instruction like "Hold Ctrl to select multiple"
- Use CSS to adjust width, height, or font
Submitting Selected Values
When used in a form, multiple selected values ??are sent as separate entries with the same name. On the server side (eg, PHP, Python), you'll receive them as an array or list.
In PHP, access them like:
$selectedFruits = $_POST['fruits']; // returns an arrayBasically, just add multiple to your select element and make sure the name ends with [] if required by your backend (eg, name="fruits[]" in PHP).
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