源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>JavaScript 操作符</h1> <p>+=能连接字符串.</p> <p id="demo"></p> <script> txt1 = "What a very "; txt1 += "nice day"; document.getElementById("demo").innerHTML = txt1; </script> </body> </html>
运行结果