JavaScript: encodeURIComponent functions

Description

The encodeURIComponent function is used to encodes a Uniform Resource Identifier (URI) component by replacing each instance of certain characters by one, two or three escape sequences representing the UTF-8 encoding of the character.

encodeURIComponent escapes all characters except the following:
alphabetic, decimal digits, - _ . ! ~ * ' ( )

Syntax

encodeURIComponent(str1)

Parameters

str1: A complete, encoded Uniform Resource Identifier.

Example encodeURIComponent Functions

In the following web document encodeURIComponent() function is used to encode a URL parameter.

JavaScript Code:

xyz = encodeURIComponent("http://myw3r.com/x=31&y=21");
//Lets create an URL
url1 = "https://w3resource.com/xyz=" + xyz + "&xyz3=45";
//Here is the complete URL
console.log(url1);

View the example in the browser

Live demo

See the Pen encodeURIComponent-function-1 by w3resource (@w3resource) on CodePen.