https://caniuse.com/?search=ciu/keyboardevent-code
"ciu/keyboardevent-code" | Can I use... Support tables for HTML5, CSS3, etc
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https://developer.mozilla.org/ja/docs/Web/API/KeyboardEvent/location
KeyboardEvent: location プロパティ - Web API | MDN
KeyboardEvent.location は読み取り専用のプロパティで、キーボードやその他の入力機器上のキーの位置を表す unsigned long を返します。
web api mdnkeyboardevent
https://developer.mozilla.org/zh-CN/docs/Web/API/KeyboardEvent
KeyboardEvent - Web API | MDN
KeyboardEvent 对象描述了用户与键盘的交互。每个事件都描述了用户与一个按键（或一个按键和修饰键的组合）的单个交互；事件类型（keydown、keypress 和 keyup）用于标识不同的键盘活动类型。
web api mdnkeyboardevent
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https://developer.mozilla.org/de/docs/Web/API/KeyboardEvent/keyIdentifier
KeyboardEvent: keyIdentifier-Eigenschaft - Web-APIs | MDN
Die veraltete, schreibgeschützte KeyboardEvent.keyIdentifier Eigenschaft gibt einen
eigenschaft web apismdn