源代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Wfuyu教程(wfuyu.com)</title> </head> <body> <p>点击按钮在弹窗总使用换行。</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> function myFunction(){ alert("Hello \nHow are you?"); } </script> </body> </html>
运行结果：