I believe that this pattern is good. Note: To remove event handlers, the function specified with the addEventListener() method must be an external function, like in the example above (myFunction). I want to improve the performance of window.onscroll. @tsuyoshiwada In that case, I don't see the harm in having a withOptions helper . It could also be something like: Implementation of withOptions was thinking the following such simple things.

If we look at the regular way of using this, it would look a little like window.addEventListener('event', handler, passive) and window.removeEventListener('event', handler) so as both functions share the same parameters we want this to use this hook in one line of code, and with three params. window.removeEventListener(‘touchmove’, func, true) window.removeEventListener(‘touchmove’, func, {capture :true}) 为什么会有 passive这个概念.

Pass a handler in object form, there is a pattern to specify the options. Additional flag is broken and there. add / removeEventListener passive options. add / removeEventListener passive options?

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像这样儿的代码

It can be implemented with backwards compatibility. There are several proposals in the options of how to specify, what do you think? The document.addEventListener() method attaches an event handler to the document.

However, it can be reattached.Calling removeEventListener() with arguments that do not identify any currently registered EventListener on the EventTarget has no effect. In the future it can be extended if there was additional flag. must use the addEventListener passive option for that. 4 comments Labels.

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An EventListener will not be invoked for the event it was registered for after being removed. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

If an EventListener is removed from an EventTarget while it is processing an event, it will not be triggered by the current actions. Comments.

Thank you for awesome library!

Definition and Usage. IMHO, the pattern 1 is far better.

The removeEventListener() method removes an event handler that has been attached with the addEventListener() method..

But anyway. Definition and Usage. 阶段执行还是在冒泡阶段执行的 useCapture 参数，变成了可选参数, 扩展新的选项，从而自定义更多的行为，目前规范中, 还想再说一点 那我设置了 passive的事件 这么移除呢 这里给出了方法, // 浏览器不知道这里会不会有 e.preventDefault(), https://developers.google.com/web/updates/2017/01/scrolling-intervention, window.addEventListener(‘touchmove’, func, { passive: false }). window.removeEventListener(‘touchmove’, func) 如果添加了 第一个参数 capture 可以这样移除. Successfully merging a pull request may close this issue. Passive event listeners solve this problem by enabling you to set a flag in the options parameter of addEventListener indicating that the listener will never cancel the scroll. (Example. That information enables browsers to scroll the page immediately, rather than after the listener has finished. It is also likely to be easy to extend by cutting as a Function . I'm not sure users will us it. Copy link Quote reply Contributor wadackel commented Oct 6, 2016. Tip: Use the element.addEventListener() method to attach an event handler to a specified element. Thanks!

Tip: Use the document.removeEventListener() method to remove an event handler that has been attached with the addEventListener() method.

Anonymous functions, like "element.removeEventListener("event", function(){ …

IE8 for the simple sample has been excluded.

enhancement. It is now read-only.