how to change dropdowns values based on a selection of another dropdown using jquery

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I have my first dropdown with 2 selections: Standard Glass and Tempered glass. I have another dropdown where the user can select the width of the glass.

My problem:

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3条回答

鱼传尺愫

2020-12-11 09:58

I would suggest having just two selects, then changing the 2nd select based on what is selected in the first.

$('#typeOfGlass').on('change', function(){
    $('#glassWidth').html('');
    if($('#typeOfGlass').val()==15){
        $('#glassWidth').append('<option value="19">19</option>');
        $('#glassWidth').append('<option value="20">20</option>');
        $('#glassWidth').append('<option value="21">21</option>');
    }else{
        $('#glassWidth').append('<option value="6">6</option>');
        $('#glassWidth').append('<option value="7">7</option>');
        $('#glassWidth').append('<option value="8">8</option>');
        $('#glassWidth').append('<option value="9">9</option>');
    }
});

Here is a working example: https://jsfiddle.net/6hmpa1ax/

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长情又很酷

2020-12-11 10:05

have a look at this code

<body  onLoad="fun('')">

<select id="typeOfGlass" onchange="fun(this.value)" >
 <option value=''>select</option>
  <option value="15">Standard/Annealed Glass Width</option>
    <option value="20">Tempered Glass Width</option>
</select><br/><br/>


    <select id="glassWidthStandard">
        <option value="19">19</option>
      <option value="20">20</option>
      <option value="21">21</option>
    </select>
    <select id="glassWidthTempered">
        <option value="6">6</option>
        <option value="7">7</option>
        <option value="8">8</option>
    </select>


</body>
<script>
 function fun(val)
 {
  if(val==15)
  {
    $('#glassWidthTempered').hide();
    $('#glassWidthStandard').show();
  }
  else if(val==20)
  {
    $('#glassWidthStandard').hide();
    $('#glassWidthTempered').show();
  }
  else if(val=='')
  {
    $('#glassWidthStandard').hide();
    $('#glassWidthTempered').hide();
  }
 }
</script>

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别跟我提以往

2020-12-11 10:12

As an alternative, if you don't want to dynamically change the DOM you can hide/show the premade markup. DEMO

HTML

<select id="typeOfGlass">
    <option selected disabled>Please select a glass type</option>
    <option value="15">Standard/Annealed Glass Width</option>
    <option value="20">Tempered Glass Width</option>
</select>
<br />

<div class="standard">
    <label>Glass Width for Standard:</label>
    <select id="glassWidthStandard">
        <option value="19">19</option>
        <option value="20">20</option>
        <option value="21">21</option>
    </select>
</div>
<div class="tempered">
    <label>Glass Width for Tempered:</label>
    <select id="glassWidthTempered">
        <option value="6">6</option>
        <option value="7">7</option>
        <option value="8">8</option>
        <option value="9">9</option>
    </select>
</div>

jQuery

$('#typeOfGlass').on('change', function(){
    if( $(this).val() == 15 ){
        $('.tempered').hide();
        $('.standard').show();
    } else if( $(this).val() == 20 ){
        $('.standard').hide();
        $('.tempered').show();
    }
});

CSS

.standard, .tempered {
    display:none;
}

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