--- breadcrumbs: - - /teams - Teams page_name: input-dev title: Input Team --- *The Chromium Input team (aka input-dev)* is a web platform team focused on making touch (P1) and other forms of input (P2) awesome on the web. High-level goals: * Measure & improve input-to-paint latency. Web pages should stick to your finger! * Reduce web-developer pain points around input and scrolling, including improving interoperability between browser engines, predictability, simplicity and consistency between chromium platforms. * Enable high-performance rich touch interactions (such as pull-to-refresh) on the web. * Ensure Chrome UI features driven by input over the contents area provide a great experience to both end-users and web developers. * Enable the productivity of any chromium developer working with input-related code through effective code ownership and code health initiatives. See also our concrete [quarterly objectives](/teams/input-dev/input-objectives). **Contacts** [input-dev@chromium.org](https://groups.google.com/a/chromium.org/forum/#!forum/input-dev) is our mailing list, and we also use the #input-dev channel on [Chromium Slack](https://chromium.slack.com). **Useful bug queries** * [Blink>input, Blink>scroll](https://bugs.chromium.org/p/chromium/issues/list?can=2&q=component%3ABlink%3EInput%2CBlink%3EScroll&sort=-id+-modified+-opened&colspec=ID+Pri+Summary+Modified+Opened&x=m&y=releaseblock&cells=ids) - all (or most) bugs we're tracking * We triage the bugs almost daily with [this process](https://docs.google.com/document/d/1IDjoUbe8_1lbhM10EVHwvMi0g9EUXImy0ufxtfvJqe0/edit). * [Available bugs](https://bugs.chromium.org/p/chromium/issues/list?can=2&q=component%3ABlink%3EInput%2CBlink%3EScroll+status%3AAvailable+&sort=-id+-modified+-opened&colspec=ID+Pri+Summary+Modified+Opened&x=m&y=releaseblock&cells=ids) * [Code cleanup ideas](https://bugs.chromium.org/p/chromium/issues/list?can=2&q=component%3ABlink%3EInput%2CBlink%3EScroll+Hotlist%3DCodeHealth+&sort=-id+-modified+-opened&colspec=ID+Pri+Summary+Modified+Opened&x=m&y=releaseblock&cells=ids) **Related specifications & Working Groups** If you want to get involved with any of the specifications or just get all the updates make sure to join their public mailing lists as well. * [W3C UI Events](https://w3c.github.io/uievents/) * [W3C Pointer Events](https://w3c.github.io/pointerevents/) * [W3C Pointer Lock](https://w3c.github.io/pointerlock/) * [W3C Touch Events](https://w3c.github.io/touch-events/) * [W3C CSS](https://drafts.csswg.org/) * [WHATWG DOM](https://dom.spec.whatwg.org/) * [WHATWG HTML](https://html.spec.whatwg.org/) **Presentations & Talks** * [Overscroll Customization](https://youtube.com/watch?v=sp1R-0dd7qg&t=18m54s) lightning talk * [Scroll into text](https://youtube.com/watch?v=sp1R-0dd7qg&t=15m50s) lightning talk * [Event Delegation to Workers](https://docs.google.com/presentation/d/1BCEbLCg-o_Ko65byel5QGnO7Cwf5aPZPjqnnMNbbA5E/edit#slide=id.g5636de1525_0_0) * [Fling On Browser](https://docs.google.com/presentation/d/1miFAvKuz7tRT4IX_nCwZshFkUDX8bDYqfPlTOm2LS8U/) * [Scroll & Input Prediction](https://docs.google.com/presentation/d/18Dv2KBJxHnNezrTCzz29IyczhJwSIs8kTzwl2FuvGq0/edit#slide=id.p) * [WPT Automation](https://drive.google.com/file/d/1eBa7OvO6O9UefK-AYkclFz46ArGZ5iyH/view) * [Browserside User Activation](https://docs.google.com/presentation/d/1sEBwQZJ8w47OC7m2LexiJor8nUWPhqDaXqP5aWhYK60/) * [Root Scroller](https://docs.google.com/presentation/d/1nfM4jjQt9pijIThK8KSwavdZtWgifDjo6odHNg-ThvM/) * Extensible Scrolling - BlinkOn 3 (Nov 2014): [slides](https://docs.google.com/a/chromium.org/presentation/d/1P5LYe-jqC0mSFJoBDz8gfJZMDwj6aGeFYLx_AD6LHVU/edit#slide=id.p), [video](https://youtube.com/watch?v=L8aTuoQWI8A) * [Smooth to the touch: chromium's challenges in input on mobile](https://docs.google.com/a/chromium.org/presentation/d/1VYfCKye4TM-QiR_hiLvwYxhci_xc5YcA4oZxtrp2qes/edit#slide=id.p) - BlinkOn 2 (May 2014) * [Input - BlinkOn 1](https://docs.google.com/a/chromium.org/presentation/d/1J1jG0XF6k42PA4s-otHFXZxrou7aKwYKYF90xPOe9bQ/edit#slide=id.p) (Sept 2013) * [Point, click, tap, touch - Building multi-device web interfaces](https://developers.google.com/events/io/sessions/361772634) - Google I/O 2013 **Design Docs** * [Scroll Unification](https://docs.google.com/document/d/1op5USoxDnN6yxB8EiFHYcGHacrZZRVKVqu4mSXFd6Ns/edit) * [Chromium input latency tracking](https://docs.google.com/a/chromium.org/document/d/1NUYMVyUJSU2NYrpGhKNfjSmmVZyPYoqbrPs7tbdY9PY/edit) * [Scroll-blocks-on: scrolling performance vs. richness tradeoff](https://docs.google.com/a/chromium.org/document/d/1aOQRw76C0enLBd0mCG_-IM6bso7DxXwvqTiRWgNdTn8/edit) * [Chromium throttled async touchmove scrolling](https://docs.google.com/a/chromium.org/document/d/1sfUup3nsJG3zJTf0YR0s2C5vgFTYEmfEqZs01VVj8tE/edit) * [Gesture Recognition](/developers/design-documents/aura/gesture-recognizer) * [Vsync-aligned buffered input](https://docs.google.com/document/d/1L2JTgYMksmXgujKxxhyV45xL8jNhbCh60NQHoueKyS4/edit?usp=sharing) * [Touchpad and Wheel Latching](https://docs.google.com/document/d/1BizkQyW_FDU98sGxbHOZsAQWGYIA3xxXoFQZ3_XNo1o/edit) * [Touchpad pinch zoom](https://docs.google.com/document/d/1cYdt9r9stHLA2lbJ2I-Ucl_djhdSyngYFbmufZaLRHE/edit?usp=sharing) * User Activation v2 * [How Chrome uses user gestures](https://docs.google.com/document/d/1mcxB5J_u370juJhSsmK0XQONG2CIE3mvu827O-Knw_Y/edit?usp=sharing) (May 2017) * [Case study: Popup with user-activation across browsers](https://docs.google.com/document/d/1hYRTEkfWDl-KO4Y6cG469FBC3nyBy9_SYItZ1EEsXUA/edit?usp=sharing) (May 2017) * [User Activation v2: Main design](https://docs.google.com/document/d/1erpl1yqJlc1pH0QvVVmi1s3WzqQLsEXTLLh6VuYp228/edit?usp=sharing) (May 2017) * [User Activation v2 with site isolation](https://docs.google.com/document/d/1XL3vCedkqL65ueaGVD-kfB5RnnrnTaxLc7kmU91oerg/edit?usp=sharing) (May 2018) * Input for Worker: * Initial design discussion: [Low-latency Event Handling in Worker](https://docs.google.com/document/d/165f85uAKlknlQHwPkmpqLVq0O50XVkxzgTkO4utAsds/edit?usp=sharing) (July 2017) * JS API proposals for [Routing Worker Events through the Compositor Thread](https://docs.google.com/a/chromium.org/document/d/1Ah3-O7Emp7cURyh-TINME0fId9laU0ctMCwjmlArgqU/edit?usp=sharing) (July 2017) * [Plumbing mouse as mouse on Android](https://docs.google.com/document/d/1mpBR7J7kgTXvp0QACVjhxtwNJ7bgGoTMmxfxN2dupGg/edit?usp=sharing) (October 2016) * [Coalesced Events](https://docs.google.com/document/d/1x-e8fH3I0DBrmrNufPQwRJHMYnW5q9CYZVEHe7BsfpI/edit?usp=sharing) (October 2016) # **Learning Resources** * [Chromium touch pipeline overview](https://docs.google.com/a/chromium.org/presentation/d/10oIOTWFKIHArnfk8ZZx-9evvDpWC9EwRjDrZIz83Dz0/edit) * [Scrolling in blink](http://bit.ly/blink-scrolling) * [Android tracing cheat sheet](https://docs.google.com/presentation/u/1/d/1poMF7AEu5vd21BzUTIYfm2SXurEMlv2OVDlzs6JNRfg/edit?usp=sharing) * [Blink coordinate spaces](/developers/design-documents/blink-coordinate-spaces) * [Touch event behavior details across browsers](https://docs.google.com/a/chromium.org/document/d/12k_LL_Ot9GjF8zGWP9eI_3IMbSizD72susba0frg44Y/edit#heading=h.nxfgrfmqhzn7) * [Issues with touch events](https://docs.google.com/a/chromium.org/document/d/12-HPlSIF7-ISY8TQHtuQ3IqDi-isZVI0Yzv5zwl90VU/edit#heading=h.spopy4jje82p) * [Debugging common website touch issues](https://docs.google.com/a/chromium.org/document/d/1iQtI4f47_gBTCDRALcA4l9HL_h-yZLOdvWLUi2xqJXQ/edit)