​x
 
<!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>
​