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<!DOCTYPE html> <html> <body> <h2>JavaScript 对象构造函数</h2> <p id="demo"></p> <script> var x1 = new Object(); // A new Object object var x2 = new String(); // A new String object var x3 = new Number(); // A new Number object var x4 = new Boolean(); // A new Boolean object var x5 = new Array(); // A new Array object var x6 = new RegExp(); // A new RegExp object var x7 = new Function(); // A new Function object var x8 = new Date(); // A new Date object // Display the type of all objects document.getElementById("demo").innerHTML = "x1: " + typeof x1 + "<br>" + "x2: " + typeof x2 + "<br>" + "x3: " + typeof x3 + "<br>" + "x4: " + typeof x4 + "<br>" + "x5: " + typeof x5 + "<br>" + "x6: " + typeof x6 + "<br>" + "x7: " + typeof x7 + "<br>" + "x8: " + typeof x8 + "<br>"; </script> <p>无需使用 String()、Number()、Boolean()、Array() 和 RegExp()</p> <p>阅读 JavaScript 教程。</p> </body> </html>