Babel支持addEventListener一次?(第三个参数选项对象)

Question

我测试了，它可以工作，但我不确定这是否是我的浏览器。babel是否支持有第三个参数的addEventListener作为对象?我想设置once:true:

https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener

的目标。addEventListener(type, listener[， options]);

options Optional
    An options object that specifies characteristics about the event listener. The available options are:
        capture: A Boolean that indicates that events of this type will be dispatched to the registered listener before being dispatched to any EventTarget beneath it in the DOM tree.  
        once: A Boolean indicating that the listener should be invoked at most once after being added. If it is true, the listener would be removed automatically when it is invoked.
        passive: A Boolean indicating that the listener will never call preventDefault(). If it does, the user agent should ignore it and generate a console warning.

Answer 1

Babel不提供这样的东西。Babel试图让标准的ES6+语法和库功能在旧的浏览器中工作。DOM API (addEventListener是其中的一部分)不是由ECMAScript语言规范定义的，因此它与Babel无关。

你想加载一个DOM多边形，如https://github.com/WebReflection/dom4.