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# \_.isNull（是否为null）

**语法：**

```javascript
_.isNull(value)
```

**源代码链接：**[source](https://github.com/lodash/lodash/blob/4.17.10/lodash.js#L11948)

**npm包链接：**[npm package](https://www.npmjs.com/package/lodash.isnull)

**描述：**

检查`value`alue 是否是`null`。

**开始版本：**0.1.0

**参数：**

* `value (*)`: 要检查的值。

**返回值：**

* `(boolean)`: 如果`value`为`null`，那么返回`true`，否则返回`false`。

**例子：**

```javascript
_.isNull(null);
// => true

_.isNull(void 0);
// => false
```