我有一个window.matchMedia的问题,在下面的脚本中我试图将数字增加3,当屏幕达到最大宽度768px时,怎么没有发生任何建议?
<script>
var mq = window.matchMedia('@media (max-width:768px;)');
mq.addListener(function(changed) {
if(changed.matches) {
var $x = document.getElementsByClassName("example");
for(i=0; i < 40; i++){
$x[i].innerHTML = i+3;
}
}else {
$x[i].innerHTML = i+1;
}
});
</script>
<html>
<head>
<meta charset="utf-8">
<title>test</title>
<style type="text/css">
@media (min-width:768px){
body{background-color:#929292;}
</style>
</head>
<body>
<div class="example">1</div>
<div class="example">2</div>
<div class="example">3</div>
<div class="example">4</div>
</body>
</html>
答案 0 :(得分:0)
在css中尝试这样(根据需要更改媒体查询) 3表示初始值
body {
counter-reset: item 0;
list-style-type: decimal;
}
.example:before {
content: counter(item, decimal) ' ';
counter-increment: item;
}
@media (max-width: 768px) {
body {
counter-reset: item 3;
}
}
你可以到这里:jsfiddle并输入html:
<div class="example">a</div>
<div class="example">b</div>
<div class="example">c</div>
<div class="example">d</div>
<div class="example">e</div>
和css:
body {
counter-reset: item 0;
list-style-type: decimal;
}
.example:before {
content: counter(item, decimal) ' ';
counter-increment: item;
}
@media (max-width: 10px) {
body {
counter-reset: item 3;
}
}
您会看到数字从1到5,当您将查询限制更改为1000时,它会变为4到8