Javascript [Electronic resources] : The Definitive Guide (4th Edition) نسخه متنی

Availability

JavaScript 1.0; JScript 1.0; ECMAScript v1; deprecated in
ECMAScript v3

Synopsis

escape(s)

Arguments

s

The string that is to be "escaped" or encoded.

Returns

An encoded copy of s in which certain
characters have been replaced by hexadecimal escape sequences.

Description

escape( ) is a global function. It returns a new
string that contains an encoded version of
s. The string s
itself is not modified.

escape( ) returns a string in which all characters
of s other than ASCII letters, digits, and
the punctuation characters @, *, _, +, -, ., and / have been replaced
by escape sequences of the form
%xx or
%uxxxx (where
x represents a hexadecimal digit). Unicode
characters \u0000 to \u00ff are
replaced with the %xx
escape sequence, and all other Unicode characters are replaced with
the %uxxxx sequence.

Use the unescape( ) function to decode a string
encoded with escape( ).

In client-side JavaScript, a common use of escape(
) is to encode cookie values, which have restrictions on
the punctuation characters they may contain. See the
Document.cookie reference page in the client-side
reference section.

Although the escape( ) function was standardized
in the first version of ECMAScript, it has been deprecated and
removed from the standard by ECMAScript v3. Implementations of
ECMAScript are likely to implement this function, but they are not
required to. In JavaScript 1.5 and JScript 5.5 and later, you should
use encodeURI( ) and encodeURIComponent(
) instead of escape( ).

Example

escape("Hello World!");  // Returns "Hello%20World%21"

See Also

encodeURI( ), encodeURIComponent( ), String, escape( );
Document.cookie in the client-side reference section