Making touch scrolling fast by default | Blog | Chrome for Developers

We know that scrolling responsiveness is critical to the user's engagement with a website on mobile, yet touch event listeners often cause serious scrolling performance problems. Chrome has been addressing this by allowing touch event listeners to be passive (passing the {passive: true} option to addEventListener()) and shipping the pointer events API. These are great features to drive new content

[berlysia]

この挙動知らなかった

[efcl]

Chrome 56からtouch eventをlistenすると `{passive: true}`がデフォルトとなる。 デフォルトでは`touchstart`の中で`event.preventDefault()`を呼ぶと無視され警告がコンソールに表示される。

[pirosikick]

"In Chrome 56 we are defaulting touch listeners to passive by default"