HTML select下拉自定义箭头css

Question

我试图将自定义箭头用于代码中提到的下拉菜单。我在这里面临两个问题。

1。无法将箭头部分放置在下拉菜单旁边。

2。此自定义箭头不可单击。

如何实现这两个目标？

我尝试在z-index;-1部分使用:after。但是它没有按预期工作。

	 
.expenses_div {
	
	width:90% !important;
	margin:auto;
	margin-top:2%;

}

	
.expenses_div_left{
	height:40px;
	line-height:40px;
	background-color:black; 
	float:left;
	display: inline-block;
	text-align:left;
	padding-left:12px;
	color:white;
	width:48%;
	font-size: 14px !important;
	font-family : "Montserrat",sans-serif !important;
 
	} 
	
.expenses_div_right{
	
	height: 40px !important;
	line-height: 40px !important;
	width:48%;
	float:left;
	display: inline-block;
	cursor:pointer;
	background:transparent !important;
	
}



 
.expenses_div_right select {

	font-family : "Montserrat",sans-serif !important;
	background:transparent !important;
	appearance:none !important;
	-moz-appearance:none !important;
	-webkit-appearance:none !important;
	-webkit-box-sizing: border-box !important;
	-moz-box-sizing: border-box !important;
	box-sizing: border-box !important;
	border: 1px solid black !important;
	width:100%!important;
	color:black !important;
	height:40px;
	text-align:left !important;
	font-size: 14px !important;
	outline: none; 
	background-color:none !important;
	position: relative !important;
	cursor:pointer;
	padding-left:12px;
  
}
 

.expenses_div_right:after { 
	content: '< >';
	font: 16px "Consolas", monospace;
	font-weight:bold;
	color: white;
	background-color:black;
  display:inline-block;
	-webkit-transform: rotate(90deg);
	-moz-transform: rotate(90deg);
	-ms-transform: rotate(90deg);
	transform: rotate(90deg);
	position: relative;
	width:40px;
	height:40px;
	text-align:center;
	line-height:40px;
	overflow:hidden !important;
	cursor:pointer;

}

<div class="expenses_div">
			<div class="expenses_div_left" >How to Proceed</div>
			<div class="expenses_div_right" >
				<select name="main_selection"  id="main_selection" >
					<option selected value="">Select an option</option>
					<option value="new_data">New Data</option>
					<option value="analize_data">Analyze Data</option>
					<option value="refresh_data">Refresh Data</option> 
				</select>
			</div>
		</div>

Answer 1

位置并单击！

评论的更改：

代码段：

>>> tst = [489, 495, 501, 506, 508, 514, 520, 525, 527, 529]
>>> sub_lists_revised(tst)
# the whole list
[489, 495, 501, 506, 508, 514, 520, 525, 527, 529]
# all possible pairs
[[[489, 495, 501], [506, 508, 514, 520, 525, 527, 529]],
[[489, 495, 501, 506], [508, 514, 520, 525, 527, 529]],
[[489, 495, 501, 506, 508], [514, 520, 525, 527, 529]],
[[489, 495, 501, 506, 508, 514], [520, 525, 527, 529]],
[[489, 495, 501, 506, 508, 514, 520], [525, 527, 529]]]
# and finally, all possible triplets which i couldn't figure out
[[[489, 495, 501], [506, 508, 514], [520, 525, 527, 529]],
[[489, 495, 501], [506, 508, 514, 520], [525, 527, 529]],
[[489, 495, 501, 506], [508, 514, 520], [525, 527, 529]]]

.expenses_div {

width:90% !important;
margin:auto;
margin-top:2%;

}


.expenses_div_left{
height:40px;
line-height:40px;
background-color:black; 
float:left;
display: inline-block;
text-align:left;
padding-left:12px;
color:white;
width:48%;
font-size: 14px !important;
font-family : "Montserrat",sans-serif !important;

} 

.expenses_div_right{

height: 40px !important;
line-height: 40px !important;
width:48%;
float:left;
display: inline-block;
cursor:pointer;
background:transparent !important;
position:relative;/*Added (Because :after should be relative to this not whole page! )*/

}




.expenses_div_right select {

font-family : "Montserrat",sans-serif !important;
background:transparent !important;
appearance:none !important;
-moz-appearance:none !important;
-webkit-appearance:none !important;
-webkit-box-sizing: border-box !important;
-moz-box-sizing: border-box !important;
box-sizing: border-box !important;
border: 1px solid black !important;
width:100%!important;
color:black !important;
height:40px;
text-align:left !important;
font-size: 14px !important;
outline: none; 
background-color:none !important;
position: relative !important;
cursor:pointer;
padding-left:12px;

}


.expenses_div_right:after { 
content: '< >';
font: 16px "Consolas", monospace;
font-weight:bold;
color: white;
background-color:black;
display:inline-block;
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-ms-transform: rotate(90deg);
transform: rotate(90deg);
position: absolute;/*Changed to absolute*/
top:0;/*Added*/
right:0;/*Added*/
width:40px;
height:40px;
text-align:center;
line-height:40px;
overflow:hidden !important;
cursor:pointer;
z-index :-1 ;/*Added ( For Your 2nd Question )*/
}

我认为这对您有帮助！