fadeIn() :淡入
fadeOut() :淡出
fadeToggle() :切换
fadeTo(opacity) :淡出到指定透明度 opacity[0-1]
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>淡入淡出</title>
<style>
#box {
width: 300px;
height: 200px;
border: 1px solid #000;
background-color: #ccc;
}
</style>
</head>
<body>
<button id="show">显示</button>
<button id="hide">隐藏</button>
<button id="toggle">切换</button>
<div id="box">文字</div>
<script src=" https://cdn.bootcss.com/jquery/3.5.0/jquery.min.js"></script>
<script>
$("#show").click(function() {
$("#box").fadeIn()
})
$("#hide").click(function() {
$("#box").fadeOut()
})
$("#toggle").click(function() {
$("#box").fadeToggle()
})
</script>
</body>
</html>
原文:https://www.cnblogs.com/dongxuelove/p/12933777.html