Hide options in mdb-select

Topic: Hide options in mdb-select

BMarkus pro asked 6 years ago

Hi there!

I am trying to make a dependent select so then I am selecting one option in the first select, some options of the second select just disappear.

I was trying to make this with JavaScript:

function changeSecond( firstSelect ) {
    var idFirst = firstSelect.options[firstSelect.selectedIndex].value;
    var secondSelect = document.getElementById('secondSelect');
    var numOfSecondOptions = secondSelect.options.length;

    for ( i = 1 ; i < numOfSecondOptions ; i++ ) {
        if ( secondSelect.options[i].dataset.idfirst == idFirst ) {
            secondSelect.options[i].className = 'd-block';
        } else {
            secondSelect.options[i].className = 'd-none';
        }
    }
}

But 'display: none' doesnt do anything.
In the web code of the "live" page the css option 'display: none!important;' was shown.
I also tried it with jQuery, but the result was the same, nothing disappeared.

As I changed the class from 'mdb-select' to 'browser-default' everything worked fine.

How can I hide options in mdb-select?

Thanks!

Regards
Markus

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Mikołaj Smoleński staff answered 6 years ago

1 0 Best answer

Please insert min. 20 characters.

Hi BMarkus, I've prepared for You an example which shows how to remove an option from select. I think it might be helpful in Your issue:

// HTML
<div class="container">
 <div>
  <select id="select-box" class="mdb-select colorful-select dropdown-primary">
   <option value="" disabled selected>Choose your country</option>
   <option value="1">USA</option>
   <option value="2">Germany</option>
   <option value="3">France</option>
   <option value="4">Poland</option>
   <option value="5">Japan</option>
  </select>
 </div>
 <button class="btn-save btn btn-primary btn-sm" id="remove-value" data-value="3">Remove value #3 (France)</button>
</div>

// JS
$('.mdb-select').material_select();
$('#remove-value').on('click', function () {
 let value = $(this).attr('data-value');
 $('#select-box option[value=' + value + ']').remove();
 $('.mdb-select').material_select('destroy');
 $('.mdb-select').material_select();
})

Regards

leegellie pro commented 5 years ago

This is good but what if I want to hide options so I can un-hide them later?

Mikołaj Smoleński staff commented 5 years ago

You will have to define a new variable for them before removing. Then just add them to select and update it again to see the changes.

Best regards

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Status

Answered

Specification of the issue

ForumUser: Pro
Premium support: No
Technology: MDB jQuery
MDB Version: -
Device: -
Browser: -
OS: -
Provided sample code: No
Provided link: No

BMarkus

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