v1
11/19/2018 by juanlu 11/19/201800
Setup HTML
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<select>
<option value="A" selected>Option A</option>
<option value="B">Option B</option>
<option value="C">Option C</option>
<option value="D">Option D</option>
</select>ready
$("select").each(function () {
$(this).val($(this).find('option[selected]').val());
});ready
let selects = document.getElementsByTagName('select');
for (let i = 0; i < selects.length; ++i) {
let currentSelect = selects[i];
let selectedOption = currentSelect.querySelector('option[selected]');
if (selectedOption) currentSelect.value = selectedOption.value;
}ready
$('select').each(function () {
var select = $(this);
var selectedValue = select.find('option[selected]').val();
if (selectedValue) {
select.val(selectedValue);
} else {
select.prop('selectedIndex', 0);
}
});