JSFiddle - React, Tailwind, and code Playground
HTML
<select>
<option value="">0</option>
<option value="1">1</option>
<option value=" ">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>JavaScript
$('select option')
.filter(function() {
+$.trim(this.value).length == 0;
})
.remove();
$('select option').first().prop('selected', true);