Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <h2>切勿将字符串创建为对象。</h2> <p>无法安全地比较字符串和对象。</p> <p id="demo"></p> <script> var x = "John"; // x is a string var y = new String("John"); // y is an object document.getElementById("demo").innerHTML = (x===y); </script> </body> </html>