源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>JavaScript是区分大小写的</h1> <p>尝试修改lastName为lastname.</p> <p id="demo"></p> <script> var lastname, lastName; lastName = "Doe"; lastname = "Peterson"; document.getElementById("demo").innerHTML = lastName; </script> </body> </html>
运行结果