源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <p>不要创建数字作为对象.</p> <p>数字和对象不能安全地比较.</p> <p id="demo"></p> <script> var x = 500; // x is a number var y = new Number(500); // y is an object document.getElementById("demo").innerHTML = (x===y); </script> </body> </html>
运行结果