InputEvent 对象¶

• type string - 可以是 undefined, mouseDown, mouseUp, mouseMove, mouseEnter, mouseLeave, contextMenu, mouseWheel, rawKeyDown, keyDown, keyUp, char, gestureScrollBegin, gestureScrollEnd, gestureScrollUpdate, gestureFlingStart, gestureFlingCancel, gesturePinchBegin, gesturePinchEnd, gesturePinchUpdate, gestureTapDown, gestureShowPress, gestureTap, gestureTapCancel, gestureShortPress, gestureLongPress, gestureLongTap, gestureTwoFingerTap, gestureTapUnconfirmed, gestureDoubleTap, touchStart, touchMove, touchEnd, touchCancel, touchScrollStarted, pointerDown, pointerUp, pointerMove, pointerRawUpdate, pointerCancel 或 pointerCausedUaAction。
• modifiers string[]（可选） - 事件修饰键的数组，可以是 shift, control, ctrl, alt, meta, command, cmd, iskeypad, isautorepeat, leftbuttondown, middlebuttondown, rightbuttondown, capslock, numlock, left, right。