Returns as string encoded as a valid component of a Uniform Resource Identifier (URI).
The encodeURIComponent method returns an encoded URI. If you pass the result to decodeURIComponent, the original string is returned. Because the encodeURIComponent method encodes all characters, be careful if the string represents a path such as /folder1/folder2/default.html. The slash characters will be encoded and will not be valid if sent as a request to a Web server. Use the encodeURI method if the string contains more than a single URI component.