JavaScript unescape() Function

The Javascript unescape() function in JavaScript takes a string as a parameter and uses it to decode that string encoded by the escape() function. The hexadecimal sequence in the string is replaced by the characters they represent when decoded via unescape(). 

Note: The unescape() function is deprecated.

Syntax:

unescape(string)

Parameters:

• string: This parameter holds the string that will be decoded. 

Return value:

This function returns a decoded string. 

Note: This function only decodes the special characters, this function is deprecated. 

Prerequisite:

JavaScript escape() Function

Example 1: In this example, we will decode a simple encoded content using the unescape() function.

javascript

// Special character encoded with
// escape function
console.log(unescape("Geeks%20for%20Geeks%21%21%21"));


// Print encoded string using escape() function
// Also include exceptions i.e. @ and .
console.log(unescape("To%20contribute%20articles%20contact" +
    "%20us%20atreview-team@geeksforgeeks.org"));

Output

Geeks for Geeks!!!
To contribute articles contact us atreview-team@geeksforgeeks.org

Example 2: In this example, we will decode a simple encoded content using the unescape() function.

javascript

// Special character encoded with
// escape function
let str = escape("Geeks for Geeks!!!");
console.log("Encoded : " + str);

// unescape() function
console.log("Decoded : " + unescape(str))

// The exception
// @ and . not encoded.
str = escape("To contribute articles contact us" +
    "at review-team@geeksforgeeks.org")
console.log("Encoded : " + str);

// unescape() function
console.log("Decoded : " + unescape(str))

Output

Encoded : Geeks%20for%20Geeks%21%21%21
Decoded : Geeks for Geeks!!!
Encoded : To%20contribute%20articles%20contact%20usat%20review-team@geeksforgeeks.org
Decoded : To contribute articles contact usat ...

Exceptions: @ – + . / * _ 

We have a complete list of Javascript Functions, to check those please go through Javascript Function Complete reference article.

Supported Browsers: 

• Google Chrome 1 and above
• Edge 12 and above
• Internet Explorer 3 and above
• Mozilla Firefox 1 and above
• Safari 1 and above
• Opera 3 and above