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本开发工具在前端本地完成解析、转换与处理，代码不离开浏览器，遵循对应语法与格式规范。 工具名称：按键码 Keycode 查询 - 按下任意键，实时显示 event.key / code。
| 属性 | 值 | 说明 |
| event.code | — | 物理按键位置（推荐） |
| event.key | — | 按键字符值 |
| keyCode (废弃) | — | 旧式数字键码，仅兼容用 |
| 修饰键 | — | Ctrl/Shift/Alt/Meta |
| 键 | keyCode | 键 | keyCode |
| Enter | 13 | Space | 32 |
| Backspace | 8 | Tab | 9 |
| Escape | 27 | Delete | 46 |
| ArrowUp | 38 | ArrowDown | 40 |
| ArrowLeft | 37 | ArrowRight | 39 |
| 0-9 | 48-57 | A-Z | 65-90 |
| F1-F12 | 112-123 | Shift/Ctrl/Alt | 16/17/18 |