[html] Height of an HTML select box (dropdown)

Can someone confirm that its not possible to change the height of a dropdown that is shown when you click on a select box.

The size attribute of the select makes it look like a list, the height attribute in the CSS doesnt do much good either.

Actually you kind of can! Don't hassle with javascript... I was just stuck on the same thing for a website I'm making and if you increase the 'font-size' attribute in CSS for the tag then it automatically increases the height as well. Petty but it's something that bothers me a lot ha ha

i have been working on a dropdown replacement jquery plugin to combat this problem. As of this post, it is almost indistinguishable from a native dropdown in terms of look and functionality.

here is a demo (also a link to downloads): http://programmingdrunk.com/current-projects/dropdownReplacement/

here is the project page of the plugin:

http://plugins.jquery.com/project/dropdownreplacement

(update:) the jquery plugin page seems to no longer work. I will probably not put my plugin on their new site when they get it working, so feel free to use the programmingdrunk.com link for demo/download

NO. It's not possible to change height of a select dropdown because that property is browser specific.

However if you want that functionality, then there are many options. You can use bootstrap dropdown-menu and define it's max-height property. Something like this.

$('.dropdown-menu').on( 'click', 'a', function() {_x000D_
    var text = $(this).html();_x000D_
    var htmlText = text + ' <span class="caret"></span>';_x000D_
    $(this).closest('.dropdown').find('.dropdown-toggle').html(htmlText);_x000D_
});

.dropdown-menu {_x000D_
    max-height: 146px;_x000D_
    overflow: scroll;_x000D_
    overflow-x: hidden;_x000D_
    margin-top: 0px;_x000D_
}_x000D_
_x000D_
.caret {_x000D_
   float: right;_x000D_
    margin-top: 5%;_x000D_
}_x000D_
_x000D_
#menu1 {_x000D_
    width: 160px; _x000D_
    text-align: left;_x000D_
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">_x000D_
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>_x000D_
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>_x000D_
   _x000D_
<div class="container" style="margin:10px">_x000D_
  <div class="dropdown">_x000D_
    <button class="btn btn-default dropdown-toggle" type="button" id="menu1" data-toggle="dropdown">Tutorials_x000D_
    <span class="caret"></span></button>_x000D_
    <ul class="dropdown-menu" role="menu" aria-labelledby="menu1">_x000D_
      <li><a href="#">HTML</a></li>_x000D_
      <li><a href="#">CSS</a></li>_x000D_
      <li><a href="#">JavaScript</a></li>_x000D_
      <li><a href="#">About Us</a></li>_x000D_
      <li><a href="#">HTML</a></li>_x000D_
      <li><a href="#">CSS</a></li>_x000D_
      <li><a href="#">JavaScript</a></li>_x000D_
      <li><a href="#">About Us</a></li>_x000D_
      <li><a href="#">HTML</a></li>_x000D_
      <li><a href="#">CSS</a></li>_x000D_
      <li><a href="#">JavaScript</a></li>_x000D_
      <li><a href="#">About Us</a></li>_x000D_
      <li><a href="#">HTML</a></li>_x000D_
      <li><a href="#">CSS</a></li>_x000D_
      <li><a href="#">JavaScript</a></li>_x000D_
      <li><a href="#">About Us</a></li>_x000D_
      <li><a href="#">HTML</a></li>_x000D_
      <li><a href="#">CSS</a></li>_x000D_
      <li><a href="#">JavaScript</a></li>_x000D_
      <li><a href="#">About Us</a></li>_x000D_
      <li><a href="#">HTML</a></li>_x000D_
      <li><a href="#">CSS</a></li>_x000D_
      <li><a href="#">JavaScript</a></li>_x000D_
      <li><a href="#">About Us</a></li>_x000D_
    </ul>_x000D_
  </div>_x000D_
</div>

This is not a perfect solution but it sort of does work.

In the select tag, include the following attributes where 'n' is the number of dropdown rows that would be visible.

<select size="1" position="absolute" onclick="size=(size!=1)?n:1;" ...>

There are three problems with this solution. 1) There is a quick flash of all the elements shown during the first mouse click. 2) The position is set to 'absolute' 3) Even if there are less than 'n' items the dropdown box will still be for the size of 'n' items.

The Chi Row answer is a good option for the problem, but I've found an error i the onclick arguments. Instead, would be:

<select size="1" position="absolute" onclick="size=(size!=1)?1:n;" ...>

(And mention you must replace the "n" with the number of lines you need)

You can change the height of one. Don't use height="500"(Just an example number). Use the style. You can use <style>tag or just use this:

<!DOCTYPE html>
<html>
<body>
  <select id="option" style="height: 100px;">
    <option value="1">Option 1
    <option value="2">Option 2
  </select>
</body>
</html>

I spotlight the change:

  <select id="option" style="height: 100px;">

And even better...

style="height: 100px;">

You see that?

Please up vote if it's helpful!