[qualiteam]

There is no documentation on the function, but the usage is pretty simple:

core.microhandlers.add(
  'Your unique handler name',
  'jQuery selector',
  function (event) {
    // Your function goes there
  }
);

Use it in your .js files loaded through the getJSFiles() method.

Every time X-Cart 5 loads a page or inserts an AJAX result into the page it looks through added jQuery selectors and runs handler functions configured for matching microhandlers.