escape()

已在 ECMAScript v3 中废弃。

encodeURI()

如果你需要编码一个URL（如：放进href属性中），就调用这个函数：

encodeURI("http://www.google.com/a file with spaces.html")

获得结果：

http://www.google.com/a%20file%20with%20spaces.html

不要使用encodeURIComponent，否则你会得到如下结果：

http%3A%2F%2Fwww.google.com%2Fa%20file%20with%20spaces.html

encodeURIComponent()

如果你想编码一个URL参数的值，就调用encodeURIComponent：

param1 = encodeURIComponent("http://example.com/?a=12&b=55")
url = "http://domain.com/?param1=" + param1 + "&param2=99";

获得如下结果

http://www.domain.com/?param1=http%3A%2F%2Fxyz.com%2F%Ffa%3D12%26b%3D55&param2=99

Note that encodeURIComponent does not escape the ' character. A common bug is to use it to create html attributes such as href='MyUrl', which could suffer an injection bug. If you are constructing html from strings, either use " instead of ' for attribute quotes, or add an extra layer of encoding (' can be encoded as %27).