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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>Title</title>
- </head>
- <body>
- </body>
- <script>
- /**
- * 如何定义一个json 数据格式
- * js 对象 id name age
- */
- var obj = {"id":1,"name":"zhangsan","age":10}
- var objJson= '{"id":1,"name":"zhangsan","age":10}'
- /**
- * 我们可以从js 对象当中获取对象属性
- * 但是无法从json 字符串中获取对应属性, 必须要先把json -> js 对象才可以获取
- */
- console.log(obj.name)
- console.log(objJson.name)
- // 如果是一个数组 那么这个json 字符串张什么样
- /**
- * 定义一个对象数组[{"id":1,"name":"zhangsan","age":10},{"id":1,"name":"zhangsan","age":10}]
- */
- var arr = [{"id":1,"name":"zhangsan","age":10},{"id":1,"name":"zhangsan","age":10}]
- console.log(arr)
- var arr1 = '[{"id":1,"name":"zhangsan","age":10},{"id":1,"name":"zhangsan","age":10}]'
- console.log(arr1)
- console.log(arr[0])
- console.log(arr1[0])
- </script>
- </html>
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