源代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>享学课堂</title> </head> <body> <p>远不要创建字符串作为对象.</p> <p>字符串和对象不能安全地比较.</p> <p id="demo"></p> <script> var x = new String("John"); // x is an object var y = new String("John"); // y is an object document.getElementById("demo").innerHTML = (x==y); </script> </body> </html>
运行结果