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css:
.flightNumber{
display: none;
-moz-transition: opacity 2000ms ease-in-out;
-o-transition: opacity 2000ms ease-in-out;
-webkit-transition: opacity 2000ms ease-in-out;
/*transition: opacity 2000ms ease-in-out;
opacity: 0;
}
.runIn{
-moz-transition: opacity 2000ms ease-in-out;
-o-transition: opacity 2000ms ease-in-out;
-webkit-transition: opacity 2000ms ease-in-out;
/*transition: opacity 2000ms ease-in-out;*/
opacity: 1;
display: block;
}
html代码:<p class='flightNumber'></p>
js代码:$(".flightNumber").addClass("runIn")
PHP中文网2017-05-16 13:40:34
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
.flightNumber{
/*display: none;*/
transition: opacity 2000ms ease-in-out;
opacity: 0;
}
.runIn{
/*display: block;*/
transition: opacity 2000ms ease-in-out;
opacity: 1;
}
</style>
</head>
<body>
<p class='flightNumber' style="width: 100px; height: 100px; background-color: red;"></p>
<script src="https://cdn.bootcss.com/jquery/2.2.1/jquery.js"></script>
<script>
$(".flightNumber").addClass("runIn");
</script>
</body>
</html>
display:none 这东西加上,动画不可能有效,因为display:none意味着 页面上不解析这个元素,这个元素的所有样式是无效的,这个前提下transition: opacity 2000ms ease-in-out;是无效的,所以不可能有动画效果出现。
伊谢尔伦2017-05-16 13:40:34
谢邀。
.flightNumber{
transition: opacity 2000ms ease-in-out;
opacity: 0;
}
.runIn{
opacity: 1;
}
把俩display
都去掉,另外前缀没必要写,直接原生就行。
真有需要的话,可以先.show()
下嘛(反正你opacity
是0啥也看不到)。