It is important that you can extent jQuery to improve your work environment. Below is a code snippet to do this as simple:
If you write your code in some-file.js then follow below:
(function () { $.prototype.hi = function () { this.html("Prototype invoked...") return this } })()
Else if you write your code in <script> tag then follow below:
$.prototype.hi = function () { this.html("Prototype invoked...") return this }
Example of usage:
$(".class").hi()