React(also known as Reactjs) is a library for building user interfaces. It was originally created by Facebook and has been around for 7 years now. It is maintained by Facebook and a community of individual developers and companies. React is a library...

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Chibuzor Nwankwo
Blake Wight
Senior Fullstack Developer
Also know how react decides to re-render or not. So things like Javascript's objectref and memoization are important to understand.