Compilation of javascript basic knowledge_Basic knowledge
1 Create script block
Program code
2 Hide script code
Program code
[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh to execute
In browsers that do not support JavaScript The relevant code will not be executed in the browser3. When the browser does not support it, it will be displayed
Program code The code is as follows:
4 Link external script files
Program code The code is as follows:
5 Comment Script
Program Code The code is as follows:
// This is a comment
document. write("Hello"); // This is a comment
/*
All of this
is a comment
*/
6 output to Browser
Program code The code is as follows:
document. write("Hello jb51 .net");
7 Define variables
Program code The code is as follows:
var myVariable = "some value";
8 String addition
Program code The code is as follows:
var myString = "String1" "String2";
9 String search
Program codeIf you need to introduce external Js, you need to refresh to execute
]
10 string Replace
11 Format string
[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute ]
12 创建数组
程序代码
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
13 数组排序
程序代码
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
14 分割字符串
程序代码
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
15 弹出警告信息
程序代码
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
16 弹出确认框
程序代码
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
17 自定义函数
程序代码
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
18 调用JS函数
程序代码
19 在页面加载完成后执行函数
程序代码
Body of the page
20 条件判断
程序代码
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]
21 specified times of loop
Program code
[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute ]

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