Been doing well so far with MDC Web Components, but I've been hung up here for far too long. (Not strong in JS.)
mdc-select used to be non-native, then used native HTML select, and now once again it's non-native. For a while MDC Web supported a hidden input so that you could pass values to the server.
There's hardly any documentation - mostly just stuck users like me opening issues on GitHub:
Closed: MDC Select - no longer form input compatible #2221
Closed: [MDC Select] Example in README does send values to the web server #5295
Open: [MDCSelect] Add hidden input element to support HTML forms #5428
I need to set/update the value of a hidden input on MDCSelect change for multiple select boxes on the same page... I can get it to do it for ONE select box, but not multiple.
Here is the select box HTML:
<div class="mdc-select mdc-select--outlined region-select">
<div class="mdc-select__anchor demo-width-class">
<i class="mdc-select__dropdown-icon"></i>
<div id="demo-selected-text" class="mdc-select__selected-text" tabindex="0" aria-disabled="false" aria-expanded="false"></div>
<div class="mdc-notched-outline">
<div class="mdc-notched-outline__leading"></div>
<div class="mdc-notched-outline__notch" style="">
<label id="outlined-label" class="mdc-floating-label" style="">Region</label>
</div>
<div class="mdc-notched-outline__trailing"></div>
</div>
</div>
<div class="mdc-select__menu mdc-menu mdc-menu-surface demo-width-class">
<ul class="mdc-list">
<li data-value="" disabled="" aria-selected="false" role="option" class="mdc-list-item" tabindex="0"></li>
<li data-value="north" aria-selected="false" role="option" class="mdc-list-item" tabindex="-1">North</li>
<li data-value="east" aria-selected="false" role="option" class="mdc-list-item" tabindex="-1">East</li>
<li data-value="south" aria-selected="false" role="option" class="mdc-list-item" tabindex="-1">South</li>
<li data-value="west" aria-selected="false" role="option" class="mdc-list-item" tabindex="-1">West</li>
</ul>
</div>
<!-- THIS IS THE HIDDEN INPUT THANK YOU -->
<input type="hidden" id="name2" name="input_name2" value="" class="my_mdc-select__value" />
</div>
I've tried targeting the hidden input with id, name, and even class. I think I need some sort of integrated function, forEach, or loop - tried adding JS beneath each select with no avail. I've worked the examples (seen below) from other users and no success. JavaScript isn't my thing, I know what it supposed to be happening but don't know the function or loop syntax etc to make this work.
I need to make sure each set/update targets the correct hidden input associated with that particular select box.
Here is my JS that works for ONE select box but not multiple:
// Select Menu
import {MDCSelect} from '@material/select';
const selectElements = [].slice.call(document.querySelectorAll('.mdc-select'));
selectElements.forEach((selectEl) => {
const select = new MDCSelect(selectEl);
select.listen('MDCSelect:change', (el) => {
const elText = el.target.querySelector(`[data-value="${select.value}"]`).innerText;
console.log(`Selected option at index ${select.selectedIndex} with value "${select.value}" with a label of ${elText}`);
// this works but only saves one
document.querySelector('input.my_mdc-select__value').value = select.value;
});
});
Here is some code that others used that I haven't been able to modify/apply (taken from links above):
From nikolov-tmw:
document.querySelectorAll( '[data-mdc-auto-init="MDCSelect"]' ).forEach( function( sel ) {
sel.My_MDCSelect__Value = sel.querySelector('input.my_mdc-select__value');
if ( null !== sel.My_MDCSelect__Value ) {
sel.addEventListener( 'MDCSelect:change', function( a ) {
if ( sel.MDCSelect ) {
sel.My_MDCSelect__Value.value = sel.MDCSelect.value;
}
} );
}
} );
From daniel-dm:
<div class="mdc-select">
...
</div>
<input id="pet-select" type="hidden" name="pets">
<script>
const input = document.querySelector('#pet-select');
const select = document.querySelector('.mdc-select');
select.addEventListener('MDCSelect:change', e => {
input.value = e.detail.value;
});
</script>
Please help! This particular issue has been open since January (people struggling long before) with no clear solution to help non-JS developers implement MDCSelect boxes. Thanks in advance!
