---
title: Type Checking Utils (<is>)
desc: A set of Quasar methods for type checking.
---
> [!TIP]
> For usage with the UMD build see [here](../start/umd.md#quasar-global-object).

## is.deepEqual

Recursively checks if one Object is equal to another. Also supports Map, Set, ArrayBuffer, Regexp, Date, and many more.

```js
import { is } from 'quasar'

const objA = {/* ... */}
const objB = {/* ... */}

console.log(is.deepEqual(objA, objB)) // true or false
```

## is.object

```js
import { is } from 'quasar'

const obj = { some: 'value' }
console.log(is.object(obj)) // true
```

## is.date

```js
import { is } from 'quasar'

const date = new Date()
console.log(is.date(date)) // true

const now = Date.now()
console.log(is.date(now)) // false
```

## is.regexp

```js
import { is } from 'quasar'

const pattern1 = /\w+/
console.log(is.regexp(pattern1)) // true

const pattern2 = new RegExp('\\w+')
console.log(is.regexp(pattern2)) // true
```

## is.number

```js
import { is } from 'quasar'

const myNumber = 80
console.log(is.number(myNumber)) // true
```