select
标记是否允许使用:after
选择器以便在其后创建伪元素?
我在Mac上试过Chrome,Safari和Firefox,但它似乎无法正常工作。
答案 0 :(得分:24)
这是我用过的折衷方案。 http://jsfiddle.net/pht9d295/3/
<div class="select-wrapper">
<select>
<option>United Kingdom</option>
<option>Canada</option>
<option>United States</option>
</select>
</div>
和CSS
body {
background-color: #f6f6f6;
padding: 10px;
}
.select-wrapper {
background-color: #FFF;
display: inline-block;
position: relative;
}
.select-wrapper:after {
content:"\f078";
font-family:'FontAwesome';
position: absolute;
top: 13px;
right: 10px;
z-index: 5;
}
select {
padding: 10px 40px 10px 10px;
-webkit-appearance: none;
-ms-appearance: none;
-moz-appearance: none;
appearance: none;
border: 1px solid #bbb;
background-color: transparent;
border-radius: 0;
position: relative;
cursor: pointer;
z-index: 10;
}
答案 1 :(得分:11)
好吧,看起来select
标签不允许:after
或:before
伪,因为它们是由每个供应商自定义的,因此修改它们非常困难,这是因为它们不允许:before
或:after
伪元素。
对于每个看到这个的人来说,有一个很好的选择来创建一个带有jQuery和最小修改的自定义select
元素...创建一个select然后使用jQuery来编辑它:
// Iterate over each select element
$('select').each(function() {
// Cache the number of options
var $this = $(this),
numberOfOptions = $(this).children('option').length;
// Hides the select element
$this.addClass('s-hidden');
// Wrap the select element in a div
$this.wrap('<div class="select"></div>');
// Insert a styled div to sit over the top of the hidden select element
$this.after('<div class="styledSelect"></div>');
// Cache the styled div
var $styledSelect = $this.next('div.styledSelect');
// Show the first select option in the styled div
$styledSelect.text($this.children('option').eq(0).text());
// Insert an unordered list after the styled div and also cache the list
var $list = $('<ul />', {
'class': 'options'
}).insertAfter($styledSelect);
// Insert a list item into the unordered list for each select option
for (var i = 0; i < numberOfOptions; i++) {
$('<li />', {
text: $this.children('option').eq(i).text(),
rel: $this.children('option').eq(i).val()
}).appendTo($list);
}
// Cache the list items
var $listItems = $list.children('li');
// Show the unordered list when the styled div is clicked (also hides it if the div is clicked again)
$styledSelect.click(function(e) {
e.stopPropagation();
$('div.styledSelect.active').each(function() {
$(this).removeClass('active').next('ul.options').hide();
});
$(this).toggleClass('active').next('ul.options').toggle();
});
// Hides the unordered list when a list item is clicked and updates the styled div to show the selected list item
// Updates the select element to have the value of the equivalent option
$listItems.click(function(e) {
e.stopPropagation();
$styledSelect.text($(this).text()).removeClass('active');
$this.val($(this).attr('rel'));
$list.hide();
/* alert($this.val()); Uncomment this for demonstration! */
});
// Hides the unordered list when clicking outside of it
$(document).click(function() {
$styledSelect.removeClass('active');
$list.hide();
});
});
body {
padding: 50px;
background-color: white;
}
.s-hidden {
visibility: hidden;
padding-right: 10px;
}
.select {
cursor: pointer;
display: inline-block;
position: relative;
font: normal 11px/22px Arial, Sans-Serif;
color: black;
border: 1px solid #ccc;
}
.styledSelect {
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
background-color: white;
padding: 0 10px;
font-weight: bold;
}
.styledSelect:after {
content: "";
width: 0;
height: 0;
border: 5px solid transparent;
border-color: black transparent transparent transparent;
position: absolute;
top: 9px;
right: 6px;
}
.styledSelect:active,
.styledSelect.active {
background-color: #eee;
}
.options {
display: none;
position: absolute;
top: 100%;
right: 0;
left: 0;
z-index: 999;
margin: 0 0;
padding: 0 0;
list-style: none;
border: 1px solid #ccc;
background-color: white;
-webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
-moz-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}
.options li {
padding: 0 6px;
margin: 0 0;
padding: 0 10px;
}
.options li:hover {
background-color: #39f;
color: white;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="selectbox1">
<option value="">Select an option…</option>
<option value="aye">Aye</option>
<option value="eh">Eh</option>
<option value="ooh">Ooh</option>
<option value="whoop">Whoop</option>
</select>
<select id="selectbox2">
<option value="">Month…</option>
<option value="january">January</option>
<option value="february">February</option>
<option value="march">March</option>
<option value="april">April</option>
<option value="may">May</option>
<option value="june">June</option>
<option value="july">July</option>
<option value="august">August</option>
<option value="september">September</option>
<option value="october">October</option>
<option value="november">November</option>
<option value="december">December</option>
</select>
答案 2 :(得分:9)
这是我使用font-awesome制作的现代解决方案。我不确定它是如何跨浏览器友好的。为简洁起见,省略了供应商扩展。
<强> HTML 强>
<fieldset>
<label for="color">Select Color</label>
<div class="select-wrapper">
<select id="color">
<option>Red</option>
<option>Blue</option>
<option>Yellow</option>
</select>
<i class="fa fa-chevron-down"></i>
</div>
</fieldset>
<强> SCSS 强>
fieldset {
.select-wrapper {
position: relative;
select {
appearance: none;
position: relative;
z-index: 1;
background: transparent;
+ i {
position: absolute;
top: 40%;
right: 15px;
}
}
}
如果您的选择元素具有已定义的背景颜色,则此操作无效,因为此片段实际上将Chevron图标放在选择元素后面(允许单击图标顶部以启动选择操作)。
但是,您可以将select-wrapper设置为与select元素相同的样式,并设置其背景样式以达到相同的效果。
查看我的CodePen以获得一个工作演示,该演示使用常规标签和“占位符”标签以及其他清理后的样式(如边框和宽度)在暗色和浅色主题选择框中显示此位代码