npm install class-of   
``bash`
npm i class-of
`js
const classOf = require('class-of')
classOf(new Number(1))
//=> 'number'
`
1. Fork it!
2. Create your feature branch: git checkout -b my-new-featuregit commit -am 'Add some feature'
3. Commit your changes: git push origin my-new-feature`
4. Push to the branch:
5. Submit a pull request :D
class-of © lijsh, Released under the MIT License.
Authored and maintained by lijsh with help from contributors (list).
> github.com/lijsh · GitHub @lijsh · Twitter @lijiashen