does javascript have a .encode() method for string code example

Example 1: js escape url parameter

var myUrl = "http://www.image.com/?username=unknown&password=unknown";
var encodedURL= "http://www.foobar.com/foo?imageurl=" + encodeURIComponent(myUrl);

Example 2: jq unencode string

# -r enable raw output

jq -r .[0].string FILE.json