Until then, we'll have to fall back to rolling our own addEventListener + removeEventListener. I'm not super familiar with using TypeScript with hooks, but I've done my best to form @blixt's example to use a ref to attach a passive listener: I imagine others will come to the issue board confused about this change, so it'll be important to have a clear path forward for future issues. [zoom] make wheel event active by default. Sign in Even though the spinning rotor of the reaction wheel is precisely balanced to minimize emitted vibration due to static and dynamic imbalances, precision instrument payloads placed in the neighborhood can always be severely impacted by residual vibration forces emitted by reaction wheel assemblies. I'm unsure if previous versions are affected. The default behavior for
First of all, wheel is a mouse-only event. The push for potential performance gains should be balanced against backward compatibility. See #15036). I can prep a PR for that, even if we decide to hold off. And in many cases the devs are long gone and no one knows how stuff was built or works.
Have a question about this project? So it's a really bizarre situation. While addEventListener() will let you add the same listener more than once for the same type if the options are different, the only option removeEventListener() checks is the capture/useCapture flag. We shouldn't undermine changes Chrome believes are important for improving site performance. Are there ways to improve on the solution above? Even if React pushes a fix, this is still broken for existing sites. scrolling a page). @yspektor solution is great but my fault was I put the code in componentDidMount not in index where is invoked ReactDom.Render() Then, for onScroll to be fired, the element you're scrolling needs to actually scroll, therefore have content overflowing, while you just need to wheel over an element to trigger onWheel. Our metrics show that 75% of the wheel and mousewheel event listeners that are registered on root targets (window, document, or body) do not specify any values for the passive option and more than 98% of such listeners do not call preventDefault(). スマホでhoverアクションを適用するかどうか。ユーザビリティ的な考えだと適用しない方が多数かな、と思いますが、適用したいという人もいるかと思います。, この間、スマホでのhoverアクションを初めてテストする機会があったんですが、Chromeの開発者ツールでばんばん警告が出てびっくりしました。, 大量の警告、そして[Violation] (「違反」)という文字にびびって色々調べたのでアウトプットしていきます。, これまでスマホではhoverアクションは使わない方向でコーディングしていたので、まずどう書けばhoverを表現できるのかを検索。 However, there is an option to not trigger the drag handler before a certain delay, using the config option delay. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Is it possible we can leave the removeEventListener as is since it does only look at the capture option (and not the passive option) according to https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/removeEventListener#Matching_event_listeners_for_removal. Contents 1 ontouchstartによるスマホでのhoverアクションの有効化 2 スクロールジャンクの警告メッセージ 2.1 なぜスクロールジャンクが起きるのか 2.2 Passive Event Listenerを使用するには 3 実際に試してみる 4 wheel、mousewheel、touchstart、touchmoveのイベントには注意しよう We decided to drop support for render props and focus on hooks as we believe they’re much more convenient. @catamphetamine Sorry to hide your comment, but it doesn't help us come to a resolution and I want to keep this issue focused for others coming to the React issue board that might be confused. I have just faced the same issue as @Spenc84. @byronwall I can see how websites are broken anyway be it requiring the manual addition of { passive: false } or updating React version and rebuilding the bundle: any solution requires equal developer intervention. I'm unsure if previous versions are affected. There are three versions of the app: 1) no wheel events, 2) a React onWheel event on the inner scrollable div (which adds a global wheel event to the document), and 3) a regular DOM wheel event on the inner scrollable div. Going against their grain until the full API is in place seems a minor transgression. The more usual pattern is to add onWheel={this.handleWheel} prop. https://doi.org/10.1016/j.jsv.2011.10.033. When I remove your solution, it works well.
Browser compatibility # Most browsers support passive event listeners. Tested in react@16.8.5, react-dom@16.8.5 and Chrome v73. If any third-party libraries add passive listeners to the document prior to the execution of your code, then they will be unable to remove them when needed at a later point.
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