view infinite scroll: how to exec a js function after loading items ?
You should be able to use Drupal JS Behaviors. Views Infinite Scroll should fire off Drupal behaviors on an AJAX request. You would need to add custom JS to your pages that use infinite scrolling.

Here's an example where someone uses this to add a class to views rows loaded from Views Infinite Scroll. 

Drupal.behaviors.myBehaviorName = {
  attach: function (context, settings) {
    // run your code here
  }
};