HTML
CSS
JavaScript
Vue
React
Python
PHP
Java
.Net
Java9手册
PHP手册
CSS3手册
jQuery手册
源代码
在线运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(cainiaoplay.com)</title> </head> <body> <p>使用中括号([])来修改 JSON 对象的值。</p> <p id="demo"></p> <script> var myObj, i, x = ""; myObj = { "name":"cainiaoplay", "alexa":10000, "sites": { "site1":"www.cainiaoplay.com", "site2":"m.cainiaoplay.com", "site3":"c.cainiaoplay.com" } } myObj.sites["site1"] = "www.google.com"; for (i in myObj.sites) { x += myObj.sites[i] + "<br>"; } document.getElementById("demo").innerHTML = x; </script> </body> </html>
动行结果