lovecoding
/
web0331


			
				
					
						
						
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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>
</head>
<body>
    <ul>
        <li>你好1</li>
        <li>你好2</li>
        <li>你好3</li>
        <li>你好4</li>
    </ul>
    <script>
        /**
         * 类数组：
         * 不能直接使用数组的方法
         * 1.js常见的类数组：arguments(实参);
         * 2.由querySelectorAll,getElementsByClassName,getElementsByTagName
        */
       var arr = [1,2,3,4,5,6,7];
       console.log(arr);
       function fn1(a) {
            console.log(a,arguments)
       }
       fn1(arr);
       let list = document.querySelectorAll("ul li");
    //    list.push('9')
       console.log(list);
       //类数组转成整行数组：
       let newsList = [...list];
       newsList.push(0)
       console.log(newsList)
    </script>
</body>
</html>