点击运行
<!DOCTYPE html> <html> <body> <h1>JavaScript 字符串方法</h1> <p>请把下面的段落中的“Microsoft”替换为“W3School”：</p> <button onclick="myFunction()">试一试</button> <p id="demo">请访问 Microsoft！</p> <script> function myFunction() { var str = document.getElementById("demo").innerHTML; var txt = str.replace("MICROSOFT","W3School"); document.getElementById("demo").innerHTML = txt; } </script> <p>此例无效，因为 MICROSOFT 为大写。</p> </body> </html>
运行结果
