Method makeEvent

www/js/_hyperscript.js:2678–2682

(eventName, detail)

      return elt.matches && elt.matches(selector);
    }
    makeEvent(eventName, detail) {
      var evt = new Event(eventName, { bubbles: true, cancelable: true, composed: true });
      evt["detail"] = detail;
      return evt;
    }
    triggerEvent(elt, eventName, detail, sender) {
      detail = detail || {};
      detail["sender"] = sender;