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Javascript object type by constructor name

When one with typeof operator one gets type object it falls into somewhat wast category...

In practice you might need to narrow it down to what sort of 'object' it actually is and one way to do it is to use object constructor name to get what flavour of object it actually is: Object.prototype.toString.call(yourObject)


1. String


Object.prototype.toString.call("String")

2. Number


Object.prototype.toString.call(42)

3. Bool


Object.prototype.toString.call(true)

4. Object


Object.prototype.toString.call(Object()) or
Object.prototype.toString.call({})

5. Function


Object.prototype.toString.call(function(){})

6. Date


Object.prototype.toString.call(new Date(2015,10,21))

7. Array


Object.prototype.toString.call([]);

8. Null


Object.prototype.toString.call(null);

9. Undefined


Object.prototype.toString.call(undefined);

10. Error


Object.prototype.toString.call(Error());


Conclusion

In this page (written and validated by ) you learned about Javascript object type by constructor name . What's Next? If you are interested in completing Javascript tutorial, your next topic will be learning about: Javascript console.log.



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