源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <h1>-= 操作符</h1> <p id="demo"></p> <script> var x = 10; x -= 5; document.getElementById("demo").innerHTML = x; </script> </body> </html>
运行结果