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<!DOCTYPE html> <html> <body> <h1>使用 JavaScript 更改插入符颜色</h1> <input id="input1" class="custom" value="Custom caret color"> <p>单击“试一试”按钮将插入符颜色属性设置为“红色”：</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { document.getElementById("input1").style.caretColor = "red"; } </script> </body> </html>