Is there a way to apply a CSS style on HTML5 datalist options?

Solution 1:

Like select elements, the datalist element has very little flexibility in styling. You cannot style any of the suggested terms if that's what your question was asking.

Browsers define their own styles for these elements.

Solution 2:

You can create an alternative Datalist with Jquery

$(document).on('dblclick', 'input[list]', function(event){
    event.preventDefault();
        var str = $(this).val();
    $('div[list='+$(this).attr('list')+'] span').each(function(k, obj){
            if($(this).html().toLowerCase().indexOf(str.toLowerCase()) < 0){
                $(this).hide();
            }
        })
    $('div[list='+$(this).attr('list')+']').toggle(100);
    $(this).focus();
})

$(document).on('blur', 'input[list]', function(event){
        event.preventDefault();
        var list = $(this).attr('list');
        setTimeout(function(){
            $('div[list='+list+']').hide(100);
        }, 100);
    })

    $(document).on('click', 'div[list] span', function(event){
        event.preventDefault();
        var list = $(this).parent().attr('list');
        var item = $(this).html();
        $('input[list='+list+']').val(item);
        $('div[list='+list+']').hide(100);
    })

$(document).on('keyup', 'input[list]', function(event){
        event.preventDefault();
        var list = $(this).attr('list');
    var divList =  $('div[list='+$(this).attr('list')+']');
    if(event.which == 27){ // esc
        $(divList).hide(200);
        $(this).focus();
    }
    else if(event.which == 13){ // enter
        if($('div[list='+list+'] span:visible').length == 1){
            var str = $('div[list='+list+'] span:visible').html();
            $('input[list='+list+']').val(str);
            $('div[list='+list+']').hide(100);
        }
    }
    else if(event.which == 9){ // tab
        $('div[list]').hide();
    }
    else {
        $('div[list='+list+']').show(100);
        var str  = $(this).val();
        $('div[list='+$(this).attr('list')+'] span').each(function(){
          if($(this).html().toLowerCase().indexOf(str.toLowerCase()) < 0){
            $(this).hide(200);
          }
          else {
            $(this).show(200);
          }
        })
      }
    })

* {
  scrollbar-width: thin;
    scrollbar-color: #BBB #EEE;
}

*::-webkit-scrollbar {
  width: 10px;
}

*::-webkit-scrollbar-track {
  background: #C0C3C6;
}

*::-webkit-scrollbar-thumb {
  background-color: #888;
  border-radius: 10px;
  border: 3px solid #C0C3C6;
}

table {
    width: 400px;
    margin: 0 auto;
    background: #EEE;
    font-family: Arial;
    padding: 10px 30px;
  border-radius: 5px;
  box-shadow: 0 5px 5px -5px #000;
    --border: 1px solid #ABC;
}
table td {
  padding-bottom: 10px;
}
table h4 {
  text-align: center;
  color: #567;
  border: 1px solid #567;
  border-radius: 3px;
  padding: 15px 0;
}
input {
    padding: 10px;
    font-size: 1em;
    width: calc(100% - 20px);
    border: var(--border);
    border-radius: 3px;
}
input[list]:focus {
    outline: none;
}
input[list] + div[list] {
    display: none;
    position: absolute;
    width: 100%;
    max-height: 164px;
    overflow-y: auto;
    max-width: 330px;
    background: #FFF;
    border: var(--border);
    border-top: none;
  border-radius: 0 0 5px 5px;
  box-shadow: 0 3px 3px -3px #333;
    z-index: 100;
}
input[list] + div[list] span {
    display: block;
    padding: 7px 5px 7px 20px;
    color: #069;
    text-decoration: none;
    cursor: pointer;
}
input[list] + div[list] span:not(:last-child) {
  border-bottom: 1px solid #EEE;
}
input[list] + div[list] span:hover {
    background: rgba(100, 120, 140, .2);
}

table .instructions {
  font-size: .9em;
  color: #900;
}
table .instructions b {
  color: #123;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<table width="400">
    <tr>
        <td> <h4>DATALIST STYLING ALTERNATIVE</h4> </td>
    </tr>
    <tr>
        <td>
            <div>Programming languages</div>
            <input type="text" name="language" list="list-language">
            <div list="list-language">
                <span>CSharp</span>
                <span>Delphi</span>
                <span>Flutter</span>
                <span>Java</span>
                <span>Java Script</span>
                <span>PHP</span>
                <span>Python</span>
                <span>Ruby</span>
                <span>SAP</span>
                <span>Visual Basic</span>
            </div>
        </td>
    </tr>
    <tr>
        <td>
            <div>Cities</div>
            <input type="text" name="cities" list="list-cities">
            <div list="list-cities">
                <span>Athens</span>
                <span>Beijing</span>
                <span>Berlin</span>
                <span>Cairo</span>
                <span>Lisbon</span>
        <span>London</span>
        <span>Mexico City</span>
                <span>Moscow</span>
                <span>New York</span>
                <span>Rio de Janeiro</span>
                <span>Rome</span>
                <span>Tokyo</span>
            </div>
        </td>
    </tr>
  <tr>
    <td>
      <div class='instructions'>
        <b>INSTRUCTIONS:</b><hr>
        <p><b>Double click on the input:</b><br>Show/hide the datalist.</p>
        <p><b>Press esc on the input:</b><br>Hides datalist if visible.</p>
        <p><b>Onkeypress in the input:</b><br>Displays the datalist filtering according to the entered string.</p>
        <p><b>On pressing enter:</b><br>Ff there is only 1 element in the datalist, this value will be loaded into the input.</p>
      </div>
    <td>
  </tr>
</table>

Is there a way to apply a CSS style on HTML5 datalist options?

Solution 1:

Solution 2:

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