The difference between encodeURI and encodeuricomponent in JavaScript

encodeURI method

Encodes a text string into a valid Uniform Resource Identifier (URI).

encodeURI (uristring)

The required uristring parameter represents an encoded URI.

Description
The encodeURI method returns an encoded URI. If you pass the encoding result to decodeURI, the original string is returned. The encodeURI method does not encode the following characters: ":", "/", ";" and "?". Please encode these characters using the encodeURIComponent method.

encodeURIComponent method

Encodes a text string as a valid component of a Uniform Resource Identifier (URI).

encodeURIComponent (encodeduristring)

The required encodeduristring parameter represents an encoded URI component.

Description
The encodeURIComponent method returns an encoded URI. If you pass the encoding result to decodeURIComponent, the original string is returned. Because the encodeURIComponent method encodes all characters, note that if the string represents a path, such as/folder1/folder2/default.html, the slash will also be encoded. This will not be valid when the encoding result is sent as a request to the Web server. If the string contains more than one URI component, use the encodeURI method to encode

A comparison of the concepts of encodeURI and encodeURIComponent
encodeuri--This function does not correct ASCII letters and numbers and ASCII punctuation (including-_). ! ~ * ' ()) for encoding, other characters (such as:;/?:@&=+$,# These punctuation marks used to separate URI components) are also not escaped.

encodeuricomponent--This function also does not include ASCII letters and numbers and ASCII punctuation (including-_). ! ~ * ' ()) to encode, other characters (such as:;/?:@&=+$,# These punctuation marks used to separate the URI component) are replaced by an escape sequence of one or more hexadecimal components.

decodeURI and decodeURIComponent are their corresponding decoding functions, no longer said. Let's take a look at the test code

Second, encodeURI, encodeuricomponent test code
1, Test JS code:

The code is as follows	Copy Code
<script type= "Text/javascript" > var tst= "http://your domain name/my dir/?a=http://metsky.com/b&c= Hello"; document.write (tst+ "<br/>"); var A=encodeuri (TST); var B=decodeuri (a); document.write (A + "<br/>"); document.write (b + "<br/>"); var c=encodeuricomponent (TST); var d=decodeuricomponent (c); document.write (c+ "<br/>"); document.write (d); </script>

2. Script output:

The code is as follows	Copy Code
http://your domain/my dir/?a=http://metsky.com/b&c= ' Hello ' http://your domain/my%20dir/?a=http://metsky.com/b&c= '%e4%bd%a0%e5%a5%bd ' http://your domain/my dir/?a=http://metsky.com/b&c= ' Hello ' http%3a%2f%2f your domain%2fmy%20dir%2f%3fa%3dhttp%3a%2f%2fmetsky.com%2fb%26c%3d '%e4%bd%a0%e5%a5%bd ' http://your domain/my dir/?a=http://metsky.com/b&c= ' Hello '

3, Summary

Pay attention to the red part of the output above, so from the view of the interpretation (Heaven edge oneself understand *_*):

encodeURIComponent is the whole parameter as a component processing, think you give me the next use is "paste" after other "standard" URI to do parameter values, and encodeURI think you let me encode a URI, This URI may be used directly.