ReactJS components have three main parts of their lifecycle:
- Mounting: A component is being inserted into the DOM.
- Updating: A component is being re-rendered to determine if the DOM should be updated.
- Unmounting: A component is being removed from the DOM.

ReactJS provides lifecycle methods that you can specify to hook into this process. We provide will methods, which are called right before something happens, and did methods which are called right after something happens.

So far go good, That’s it!!! See ya!!! :)