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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta http-equiv="X-UA-Compatible" content="IE=edge">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- </head>
- <body>
- <script>
- // var a = [1,2,3,4]
- // a[0] = 6
- // console.log(a)
- /* var obj = {
- name: 'zs',
- age: 18,
- address: 'harbin'
- }
- console.log(obj) //object 属性名： 属性值 */
- // var obj = new Object()
- // console.log(obj)
- // obj.name = 'lisi'
- // obj.age = 30
- // console.log(obj)
- /* var person = new Array()
- person['age'] = 20
- person['name'] = 'ww'
- console.log(person) */
- //Array 是 特殊的Object
- var arr = new Array()
- var obj = new Object()
- console.log(typeof arr)
- console.log(typeof obj)
- /* var a = 123;
- var b = '123';
- var c = true;
- var d;
- console.log(typeof d) */
- var a = new Number()
- var b = new String()
- var c = new Boolean()
- /* 尽可能避免这种情况去写 要用合并的方式 */
- </script>
- </body>
- </html>
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