setClickEvent(i, a, u) {
    i.split(",").forEach((l) => {
      this.setClickFunc(l, a, u), this.classes.get(l).haveCallback = !0;
    }), this.setCssClass(i, "clickable");
  }
Called by parser when a click definition is found. Registers an event handler.

@param ids - Comma separated list of ids
@param functionName - Function to be called on click
@param functionArgs - Function args the function should be called with