---
url: https://sugarat.top/interview/js/judgeObj.md
---

# 如何判断变量类型是对象

> 指广义上的对象这里，Array,RegExp,function。。。。等等

## 1. instanceof

```js
{} instanceof Object // true
[] instanceof Object // true
```

## 2. typeof

```js
function isObject(obj) {
    const type = typeof obj
    return obj && type === 'object' || type === 'function'
}
```

其余方案,编写`isObject`函数稍许麻烦

* constructor
* Object.prototype.toString.call