jQuery 1.9 .live() is not a function

Question

I recently updated jQuery from 1.8 to 2.1. I suddenly discovered that the .live() stops working.
I get the error TypeError: $(...).live is not a funct

Answer 1

Forward port of .live() for jQuery >= 1.9 Avoids refactoring JS dependencies on .live() Uses optimized DOM selector context

/** 
 * Forward port jQuery.live()
 * Wrapper for newer jQuery.on()
 * Uses optimized selector context 
 * Only add if live() not already existing.
*/
if (typeof jQuery.fn.live == 'undefined' || !(jQuery.isFunction(jQuery.fn.live))) {
  jQuery.fn.extend({
      live: function (event, callback) {
         if (this.selector) {
              jQuery(document).on(event, this.selector, callback);
          }
      }
  });
}