JavaScript in Escape (), unescape (), encodeURI (), encodeURIComponent (), decodeURI (), decodeuricomponent () comparison

JS to encode the text involves 3 functions: Escape,encodeuri,encodeuricomponent, the corresponding 3 decoding function: unescape,decodeuri,decodeuricomponent

1, passing parameters need to use encodeuricomponent, so that the combined URL will not be # and other special characters truncated.

For example: <script language= "JavaScript" >document.write (' <a href= ' http://passport.baidu.com/?logout&aid=7 &u= ' +encodeuricomponent ("http://cang.baidu.com/bruce42") + ' "> Exit </a> ');</script>

2, the URL to jump when you can use the whole encodeURI

For example: Location.href=encodeuri (http://cang.baidu.com/do/s?word= Baidu &ct=21);

3, JS Use the data can use escape

For example: Search the history record of the Tibetan.

4, Escape to the Unicode value other than 0-255 to encode the output%u**** format, in other cases escape,encodeuri,encodeuricomponent encoding results are the same.

The most used should be encodeuricomponent, which is to convert the Chinese, Korean and other special characters into the utf-8 format of the URL encoding, So if you need to use encodeURIComponent to pass parameters to the background, you need the background decoding to Utf-8 support (the encoding in form is the same as the current page encoding method)

Escape does not encode characters with 69: *,+,-,.,/,@,_,0-9,a-z,a-z

encodeURI does not encode 82 characters:!,#,$,&, ', (,), *,+,,,-,.,/,:,;,=,?,@,_,~,0-9,a-z,a-z

encodeURIComponent does not encode 71 characters:!, ', (,), *,-,.,_,~,0-9,a-z,a-z

========================================================

Unescape method

Returns the decoded string from a string object encoded with the escape method.

function unescape (charstring:string): String

Parameters

Charstring

Must be selected. The String object or text to decode.

Note

The Unescape method returns a string value that contains the contents of the charstring. All characters encoded in the%XX 16 format are replaced by the equivalent characters in the ASCII character set. Characters encoded in%UXXXX format (Unicode characters) are replaced with hexadecimal-encoded XXXX Unicode characters. Note the Unescape method should not be used to decode the Uniform Resource Identifier (URI). Use the decodeURI and decodeURIComponent methods instead.

decodeURI method

Returns a non-encoded form of an encoded Uniform Resource Identifier (URI).

function decodeURI (uristring:string): String

Parameters

Uristring

Must be selected. A string that represents the encoded URI.

Note

Use the decodeURI method instead of the obsolete unescape method.

The decodeURI method returns a string value.

If uristring is not valid, Urierror will occur.

decodeURIComponent method

Returns the non-encoded form of an encoded component of a Uniform Resource Identifier (URI).

function decodeURIComponent (encodeduristring:string): String

The required encodeduristring parameter is a value that represents the encoded URI component.

Note

Uricomponent is part of a complete URI

JavaScript in Escape (), unescape (), encodeURI (), encodeURIComponent (), decodeURI (), decodeuricomponent () comparison