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<meta charset="utf-8">
<title>js dataType.constructor</title>
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<body>
<script>
/*参考：
* 1.dataType.constructor 属性返回变量或对象的构造函数。*/
console.log("john".constructor);
console.log((3.14).constructor);
console.log(false.constructor);
console.log([1, 2, 3, 4].constructor);
console.log({name: 'john', age: 34}.constructor);
console.log(new Date().constructor);
console.log(function () { }.constructor);
/*ƒ String() { [native code] }
ƒ Number() { [native code] }
ƒ Boolean() { [native code] }
ƒ Array() { [native code] }
ƒ Object() { [native code] }
ƒ Date() { [native code] }
ƒ Function() { [native code] }*/
</script>
</body>
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