创建 JavaScript 变量的最佳方式
- <!DOCTYPE html>
- <html>
- <body>
-
- <h1>JavaScript 对象构造器</h1>
-
- <p id="demo"></p>
-
- <script>
- var x1 = {}; // 对象
- var x2 = ""; // 字符串
- var x3 = 0; // 数字
- var x4 = false; // 布尔
- var x5 = []; // 对象(非数组)
- var x6 = /()/; // 对象
- var x7 = function(){}; // 函数
-
- // 显示所有类型
- 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>";
- </script>
-
- </body>
- </html>