How to Remove an Option from a Dropdown Select Box with JavaScript
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To remove an option from a dropdown select box with JavaScript, use the JavaScript remove method. Pass it the index of the option that should be removed. The index is 0-based, so to remove the first item in the select list pass 0, to remove the second pass 1 and so forth.
If this is the select list:
<select name='dropdown' id='dropdown'>
<option value='1'>1</option>
<option value='2'>2</option>
<option value='3'>3</option>
</select>
The second option can be removed as follows:
document.getElementById('dropdown').remove(1);
Related articles:
How to Remove All Options from a Dropdown Select Box with JavaScript