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?
推薦答案
在支持 DOM3 的較新瀏覽器中，您可以使用 event.location 來檢查位置.
In newer browsers supporting DOM3 you can use event.location to check the location.
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.
在這種情況下，你可以這樣做:
In this case, you can do:
if (event.location === KeyboardEvent.DOM_KEY_LOCATION_LEFT){
} else if (event.location === KeyboardEvent.DOM_KEY_LOCATION_RIGHT){
}
