jQuery 回调函数（callback）的使用和基础-js教程-PHP中文网

jQuery 回调函数（callback）的使用和基础

PHPz

发布： 2018-09-29 15:48:04

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这篇文章主要介绍了jQuery 回调函数（callback）的使用和基础,需要的朋友可以参考下

还是先贴代码吧

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <script src="js/jquery.js"></script>
    </head>
<style>
body{font-family: "微软雅黑";width: 980px; margin: 0 auto; text-align: center;}
    .box{
        width: 300px;
        height: 300px;
        background: green;
        border: 1px solid #e6e6e6;
        margintop: 50px;
        line-height: 200px;
        position: absolute;
    }
button{
    border: none;
    background: green;    
    width: 100px;
    height: 50px;
    line-height: 50px;
    color: #fff;
    font-size: 16px;
    margin-top: 50px;
    }
</style>
    <body>
        <button>点击开始动画</button>
        <p class="box" ></p>
        <script> 
            $(document).ready(function(){
              $("button").click(function(){
                var p=$(".box");
                p.animate({height:&#39;200px&#39;,opacity:&#39;0.4&#39;},"slow");
                p.animate({width:&#39;200px&#39;,opacity:&#39;0.8&#39;},"slow");
                p.animate({height:&#39;100px&#39;,opacity:&#39;0.4&#39;},"slow");
                p.animate({width:&#39;100px&#39;,opacity:&#39;0.8&#39;},"slow");
                p.animate({right:&#39;100px&#39;,opacity:&#39;0.8&#39;},"slow");
                p.animate({bottom:&#39;100px&#39;,opacity:&#39;0.8&#39;},"slow");
                p.animate({left:&#39;100px&#39;,opacity:&#39;0.8&#39;},"slow");
                p.animate({top:&#39;100px&#39;,opacity:&#39;0.8&#39;},"slow",function(){
                    alert("The paragraph is over");
                });
              });
            });
        </script> 
        <script>
            $(document).ready(function(){
                $("button").click(function(){
                    var p=$(".box");
                        p.animate({height:&#39;300px&#39;,opacity:&#39;0.4&#39;},"slow");
                        p.animate({width:&#39;300px&#39;,opacity:&#39;0.8&#39;},"slow");
                        p.animate({height:&#39;100px&#39;,opacity:&#39;0.4&#39;},"slow");
                        p.animate({width:&#39;100px&#39;,opacity:&#39;0.8&#39;},"slow",function(){
                    alert("The paragraph is over");
              　　　　  });
                    });
                });
            });
        </script>
    </body>
</html>

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所谓的回调函数，其实就是在 speed 或 duration 参数可以设置许多不同的值，比如 "slow", "fast", "normal" 或毫秒后面再添加函数，显示相对应的内容，以提示网民。

以上就是本章的全部内容，更多相关教程请访问jQuery视频教程！