The Touch Events API lets you track multiple touches at the same time on devices that support them. Build complex games, support pinch-to-zoom and more. By using multi-touch, your app can respond to all the interactions users have come to expect.
触控事件API允许你同时追踪并支持设备上的多个触点以便创建复杂的游戏、支持通过捏屏幕缩放以及更多。有了多点触控，你的程序可以响应用户期待的所有互动。