01.jQuery入门体验和原生dom获取元素的对比

jQuery第三方插件，简洁易用

需求：

点击按钮让盒子背景颜色从粉色变蓝色,宽度变为400px

1.原生js

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        #box {
            width: 200px;
            height: 200px;
            background-color: pink;
        }
    </style>
</head>
<body>
    <button id="btn">点击显示</button>
    <div id="box">
    </div>
    <script>
        window.onload = function(){
            var btn = document.getElementById("btn");
            btn.onclick = function(){
                var box = document.getElementById("box");
                box.style.backgroundColor = "skyblue";
　　　　　　　　　　box.style.width = "400px";

            }
        }
        
    </script>
</body>
</html>

效果图

2.jQuery

注意：引入jquery库

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        #box {
            width: 200px;
            height: 200px;
            background-color: pink;
        }
    </style>
    <script src="./js/jquery.min.js"></script>
    <script>
        $(function () {
            $("#btn").click(function () {
                $("#box").css({
                    "backgroundColor": "skyblue",
                    "width": "400px"
                });
            })
        })
    </script>
</head>
<body>
    <button id="btn">点击显示</button>
    <div id="box">
    </div>
</body>
</html>

　效果图

posted @ 2019-09-05 21:52 孜然&胡椒阅读(224) 评论(0) 收藏举报

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