The disabled attribute on a <select> tag disables the select element.
The dropdown control appears grayed out and is unusable.
A <select> element with a disabled attribute.
This dropdown is unusable and its selected value is not included during form submission.
<form action="/tutorial/action.html">
<select name="size" disabled>
<option value="">-- Select a Size --</option>
<option value="small">Small</option>
<option value="medium">Medium</option>
<option value="large">Large</option>
</select><br />
<button type="submit">Submit</button>
</form>
The disabled attribute specifies that the select control is disabled.
The select control appears grayed out and does not respond to user actions.
Disabled select controls are excluded from form submission.
<select disabled>
<select disabled="disabled">
| Value | Description |
|---|---|
| disabled | Use value 'disabled' or no value at all. Both are valid. |
Here is when disabled support started for each browser:
 Chrome
|
1.0 | Sep 2008 |
 Firefox
|
1.0 | Sep 2002 |
 IE/Edge
|
1.0 | Aug 1995 |
 Opera
|
1.0 | Jan 2006 |
 Safari
|
1.0 | Jan 2003 |
