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<!DOCTYPE html> <html> <body> <p>单击按钮获取按钮元素的文本内容。</p> <button onclick="myFunction()" id="myBtn">试一试</button> <p><strong>注意：</strong> innerText 属性在 Internet Explorer 9 及更早版本中不受支持。</p> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myBtn").innerText; document.getElementById("demo").innerHTML = x; } </script> </body> </html>