如何使用 onClick 和 onChange 使用 jquery 更改元素 select 选项

Question

I want to change the style of arrow on select option. The default style is caret-down. So, if cursor click the input area then change the style with caret-up. And if the select option has changed or it didnt do anything then back to default style.

This is my html:

<div class="form-group row">
    <div id="select" class="col arrow-down">
      <select name="idBengkel" class="form-control custom-select" required>
        <option value="" disabled selected>Select Item</option>
        <?php foreach($bengkel as $row):?>
          <option value="<?= $row['idBengkel'];?>"><?= $row['nmBengkel'];?></option>
        <?php endforeach;?>
      </select>
    </div>
  </div>

This is my css:

.custom-select{
  position:relative !important;
  background: transparent !important;
  -webkit-appearance: none;
}

.arrow-down::after{
  font-family: FontAwesome;
  content: '\f0d7';
  position: absolute;
  right:10%;
  bottom: 15%;
  font-size: 120%;
  pointer-events: none;
}

.arrow-up::after{
  font-family: FontAwesome;
  content: '\f0d8';
  position: absolute;
  right:10%;
  bottom: 15%;
  font-size: 120%;
  pointer-events: none;
}

This is my js:

<script>
  $('#select').on('click', function () {
    // Button clicked
    $("#select").removeClass("arrow-down");
    $("#select").addClass("arrow-up"); 
  });
  $("select").change(function () {
    // Option selected
    $("#select").addClass("arrow-down");
  });
</script>

Regard!

Answer 1

I'm removing a addClass() changed with toggleClass() , then using a hasClass into second on('click') .
So I changed also css into arrow icon to border tag.

jQuery

$('.custom-selectbox select[name=idBengkel]').on('click', function( e ) {
$(this).parent().toggleClass("open");
return false;
});
$(document).on('click', function(e) {
var $arrow = $('.custom-selectbox');
if ($arrow.hasClass('open')) {
    $arrow.removeClass('open');
} else {
    return false;
}
});

CSS

 select { /* For Example */
    color: #000;
    outline: none;
    display: inline-block;
    -moz-appearance: none;
    appearance: none;
    cursor: pointer;
    height: 20px;
    padding-right: 20px;
 }

 .custom-selectbox{
    position: relative;
    display: inline-block;
 }
 .custom-selectbox:after{
  content: '';
    height: 0;
    width: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid #000;
    position: absolute;
    right: 6px;
    top: 8px;
    transition: all 0.3s linear;
}
.custom-selectbox.open:after{
    -webkit-transform: rotate(-180deg);
    -moz-transform: rotate(-180deg);
    -o-transform: rotate(-180deg);
    transform: rotate(-180deg);
}

HTML:

  <div class="form-group row">
   <div id="select" class="col custom-selectbox">
    <select name="idBengkel" class="form-control custom-select" required>
      <option value="" disabled selected>Select Item</option>
      <option value="1">1</option>
      <option value="1">1</option>
      <option value="1">1</option>
    </select>
   </div>
 </div>

Example

 $('.custom-selectbox select[name=idBengkel]').on('click', function( e ) { $(this).parent().toggleClass("open"); return false; }); $(document).on('click', function(e) { var $arrow = $('.custom-selectbox'); if ($arrow.hasClass('open')) { $arrow.removeClass('open'); } else { return false; } });

 select { /* For Example */ color: #000; outline: none; display: inline-block; -moz-appearance: none; appearance: none; cursor: pointer; height: 20px; padding-right: 20px; }.custom-selectbox{ position: relative; display: inline-block; }.custom-selectbox:after{ content: ''; height: 0; width: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 5px solid #000; position: absolute; right: 6px; top: 8px; transition: all 0.3s linear; }.custom-selectbox.open:after{ -webkit-transform: rotate(-180deg); -moz-transform: rotate(-180deg); -o-transform: rotate(-180deg); transform: rotate(-180deg); }.arrow-down::after{ font-family: FontAwesome; content: '\f0d7'; position: absolute; right:10%; bottom: 15%; font-size: 120%; pointer-events: none; }.arrow-up::after{ font-family: FontAwesome; content: '\f0d8'; position: absolute; right:10%; bottom: 15%; font-size: 120%; pointer-events: none; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <div class="form-group row"> <div id="select" class="col custom-selectbox"> <select name="idBengkel" class="form-control custom-select" required> <option value="" disabled selected>Select Item</option> <option value="1">1</option> <option value="1">1</option> <option value="1">1</option> </select> </div> </div>