1.Null vs Undefined.

Null is a special value meaning “no value”. null is a special object because type of null returns ‘object’.
On the other hand, undefined means that the variable has not been declared, or has not been given a value.

Null means an empty or non-existent value. Null…

1.React & its history

React is an open-source, front end, JavaScript library for building user interfaces or UI components. It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile applications.

It was first…

1.Error Handling

Errors is a part of code so it appears every times in code. So all the time we need to handle errors. there are some keywords for error handling in JavaScript.


  1. try statements let you test a block of codes for error.
  2. catch statements…

Md. Nur-E-Alom Siddiky

A progressive JavaScript Developer and part time writer.

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