Function eventMixin

external/.scrollLibs.js:2014–2021

(ctor)

  // Add on and off methods to a constructor's prototype, to make
  // registering events on such objects more convenient.
  function eventMixin(ctor) {
    ctor.prototype.on = function (type, f) {
      on(this, type, f)
    }
    ctor.prototype.off = function (type, f) {
      off(this, type, f)
    }
  }

  // Due to the fact that we still support jurassic IE versions, some
  // compatibility wrappers are needed.