javascript可以区分左右shift键吗?
这主要是一个健全性检查.两个 shift 键的键码都是 16.这是否意味着实际上无法在浏览器中区分左右 shift 事件?
Mostly this is a sanity check. The key code for both shift keys is 16. Does that mean it is actually impossible to distinguish a left and right shift events in a browser?
推荐答案
在支持 DOM3 的较新浏览器中，您可以使用 event.location 来检查位置.
In newer browsers supporting DOM3 you can use event.location to check the location.
在 DOM3 规范中，为位置定义了 4 个常量，DOM_KEY_LOCATION_STANDARD、DOM_KEY_LOCATION_LEFT、DOM_KEY_LOCATION_RIGHT 和 DOM_KEY_LOCATION_NUMPAD.
In the DOM3 spec, there are 4 constants defined for location, DOM_KEY_LOCATION_STANDARD, DOM_KEY_LOCATION_LEFT, DOM_KEY_LOCATION_RIGHT, andDOM_KEY_LOCATION_NUMPAD.
在这种情况下，你可以这样做:
In this case, you can do:
if (event.location === KeyboardEvent.DOM_KEY_LOCATION_LEFT){
} else if (event.location === KeyboardEvent.DOM_KEY_LOCATION_RIGHT){
}
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