KeyboardEvent: shiftKey 属性

KeyboardEvent.shiftKey 只读属性是一个布尔值，指示事件发生时 shift 键是否被按下 (true) 或未按下 (false)。

按下 shift 键也可能更改事件的 key。例如，按下 B 会生成 key: "b"，而同时按下 Shift 会生成 key: "B"。

值

布尔值。

示例

html

<html lang="en-US">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width" />
    <title>shiftKey example</title>

    <script>
      function showChar(e) {
        alert(
          "Key Pressed: " +
            String.fromCharCode(e.charCode) +
            "\n" +
            "charCode: " +
            e.charCode +
            "\n" +
            "SHIFT key pressed: " +
            e.shiftKey +
            "\n" +
            "ALT key pressed: " +
            e.altKey +
            "\n",
        );
      }
    </script>
  </head>

  <body onkeypress="showChar(event);">
    <p>
      Press any character key, with or without holding down the SHIFT key.<br />
      You can also use the SHIFT key together with the ALT key.
    </p>
  </body>
</html>

规范

规范
UI 事件 # dom-keyboardevent-shiftkey

浏览器兼容性

BCD 表格仅在浏览器中加载

另请参阅

KeyboardEvent