Several methods of JavaScript coding in detail _ basics

escape definition and usage

The escape () function encodes the string so that it can be read on all computers.

Parameters	Description
String	Necessary. The string to be escaped or encoded.

return value

A copy of the encoded string . Some of these characters are replaced with the 16-in escape sequence.

Description

The method does not encode ASCII letters and numbers, and does not encode the following ASCII punctuation: * @-_ +. / 。 All other characters will be replaced by escape sequences.

Tips and Comments

Tip: You can use Unescape () to decode an escape () encoded string.

Note: ECMAScript v3 against using this method, the application uses decodeURI () and decodeuricomponent () to replace it.

Example:

encodeURI Definitions and usage

The encodeURI () function encodes a string as a URI.

Syntax encodeURI ( uristring)

Parameters	Description
Uristring	Necessary. A string that contains the URI or other text to encode.

return value

A copy of the uristring in which some of the characters will be replaced by the hexadecimal escape sequence.

Description

The method does not encode ASCII letters and numbers, and does not encode these ASCII punctuation marks:-_. ! ~ * ' ().

The purpose of this method is to encode the URI completely, so that the encodeURI () function is not escaped for the following ASCII punctuation that has special meaning in the URI:;/?:@&=+$,#

Tips and Comments

Can be decoded with decodeURI ()

Tip: If the URI component contains delimiters, for example? and #, you should encode each component separately using the encodeURIComponent () method.

Example

Definitions and Usage

The encodeURIComponent () function encodes a string as a URI component.

Grammar

encodeURIComponent (uristring)

Parameters	Description
Uristring	Necessary. A string that contains the URI component or other text to encode.

return value

A copy of the uristring in which some of the characters will be replaced by the hexadecimal escape sequence.

Description

The method does not encode ASCII letters and numbers, and does not encode these ASCII punctuation marks:-_. ! ~ * ' ().

Other characters (such as:;/?:@&=+$,# the punctuation marks used to separate the URI components) are replaced by one or more hexadecimal escape sequences.

Tips and Comments

tip : Note the difference between the encodeURIComponent () function and the encodeURI () function, which assumes that its arguments are part of the URI (such as protocol, host name, path, or query string). Therefore, the encodeURIComponent () function escapes the punctuation marks used to separate parts of the URI.

Example