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<!DOCTYPE html> <html> <body> <p>此示例使用 addEventListener() 方法将“select”事件附加到输入元素。</p> 选择一些文字：<input type="text" value="Hello world!" id="myText"> <p id="demo"></p> <script> document.getElementById("myText").addEventListener("select", myFunction); function myFunction() { document.getElementById("demo").innerHTML = "您选择了一些文字！"; } </script> </body> </html>