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问题:

I'd like to change the blue background color from IE when a drop down is focused, but I can't seem to find any CSS to do this.

<select id=focusSelect><option>Option</option></select>

JS:

document.getElementById("focusSelect").focus();

CSS:

select:focus{
    background-color: red;
}

http://jsfiddle.net/TafDD/3/

Specifically this is for when the drop down is not open. Styling the options is not a problem.

I also can't find any definitive answer on whether this is possible to do at all.

Setting the option background color also does not clear the blue color.

option {
    background-color: green;
}

http://jsfiddle.net/srycroft/yE2Zg/

回答1:

In Internet Explorer 11/Edge (not sure about previous versions) you can do this:

select:focus::-ms-value {
    color: black; 
    background: red;
}

You should also specify the font color because it otherwise defaults to white (to originally contrast against the blue), so you'll want to override it too.

Here's a dabblet demo

回答2:

Appreciate this is an oldish question, but to prevent the blue background on a selected option in a select dropdown in IE, use the MS pseudo element -ms-value as mentioned by WillRice above. Importantly though you need to set a color css attribute as well for the text as this will get defaulted to white.

select::-ms-value {
    background: none; /* remove blue background on ie10/ie11 when selected*/
    color:#000;
}

More info here

回答3:

I'm using the CSS below and it is working in latest IE11, Edge, Firefox and Chrome (I have not tested it with earlier browsers). Just remove border-radius and padding if you don't need them. And thanks to willrice for his contribution:

select {
  -webkit-appearance: none;
  -moz-appearance: none;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
  padding: 5px;
}

select:focus::-ms-value {
  background: white;
  color: black;
}

select::-ms-expand {
  display: none;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  border-radius: 5px;
  padding: 5px;
}

回答4:

I've been fiddling around with css and javascript and have searched the internet to find a solution. Unfortunately it looks like it's not possible to change IE's blue highlight itself. In the following example I've used a combination of CSS an JS to achieve nearly the same result in ie as you have on http://jsfiddle.net/TafDD/3/ . Have a look at it.

An example is worth a thousand words: (tested in IE7)

<!DOCTYPE html>
<html>
<head>
    <title>CSS Form Select Focus Color Change Test Page</title>
    <style type="text/css">
        /* Set the desired background color for the whole select element */
        form select {
            background-color: #fff;
        }

        form select option {
            background: transparent;
        }

        /* Set the desired color for the focus state */
        select:focus, select.focus {
            background-color: #f00;
            outline: none;
        }
    </style>
</head>
<body>

    <form action="" method="POST">
        <div id="selectWrap">
            <select id="focusSelect" name="test_select">
                <option value="1">Option 1</option>
                <option value="2">Option 2</option>
                <option value="3">Option 3</option>
            </select>
        </div>
    </form>

    <!--[if lt IE 9]><script>
        // NOTE: This is a pure JavaScript variant. 
        // You could also use something like jQuery.

        var selectBox = document.getElementById('focusSelect');

        // This will add the .focus class to the select 
        // giving it the defined background color
        selectBox.onfocusin = function() {
            this.className = 'focus';
        };

        // and this will restore the original background 
        // color by removing the .focus class
        selectBox.onfocusout = function() {
            this.className = '';
        };

        // This removes the blue highlight after an option is selected
        selectBox.onchange = function() {
            this.blur();
        };
    </script><![endif]-->

</body>
</html>

I hope this helps you.

I also recommend you have a look at: