源代碼
點擊運行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>教程</title> </head> <body> <p>局部變量在聲明的函數外不可以訪問。</p> <p id="demo"></p> <script> myFunction(); document.getElementById("demo").innerHTML = "carName 的類型是:" + typeof carName; function myFunction() { var carName = "Volvo"; } </script> </body> </html>
運行結果