lovecoding
/
W250511


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="https://at.alicdn.com/t/c/font_4974983_z46pr7nyg5p.css">
    <style>
        body{
            background-color: #f9f9f9;
        }
        .like-box{
            width: 200px;
            height: 200px;
            border-color: #fff;
            box-shadow: 0 0 10px rgba(0,0,0,0.5);
            position: fixed;
            top:50%;
            left: 50%;
            margin-top: -160px;
            margin-left: -140px;
            padding: 60px 40px;
            text-align: center;
        }
        .like-box .like-title{
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 20px;
        }
        .like-box .like-icon .iconfont{
            font-size: 70px;
            color: #aaa;
        }
        .like-box .like-icon .iconfont:hover{
            color: red;
            cursor: pointer;
        }
        .like-box .like-num{
            font-size: 30px;
            font-weight: bold;
        }
        .like-box .like-text{
            margin-top: 10px;
            font-size: 12px;
            color: #aaa;
        }
    </style>
</head>
<body>
    <div class="like-box">
        <div class="like-title">点赞计数器</div>
        <div class="like-icon">
            <i class="iconfont icon-icons-"></i>
        </div>
        <div class="like-num"></div>
        <div class="like-text">点击心形图标进行点赞</div>
    </div>
    <script>
        // 功能一 实现向标签内插入数组
        // 获取数字标签 返回类数组
        var likeIcon = document.getElementsByClassName("like-num");
        // 从类数组中取出数字标签
        likeIcon = likeIcon[0];
        // 向数字标签中写入内容
        likeIcon.innerText = 0;

        // 功能二实现累加
        // 获取心形图标
        var likeBtn = document.getElementsByClassName("iconfont");
        // 从数组中取出心形图标
        likeBtn = likeBtn[0];
        // 给心形图标添加点击事件
        // 定义变量用作于累计的数字
        var num = 0;
        likeBtn.onclick = function(){
            // 让num进行一个累加操作
            num++;
            // 把累加后的数字赋值给数字标签
            likeIcon.innerText = num;
        }

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