The hooks api is a game-changing new framework introduced by the Facebook team in React 16.8. It represents a radical foray into a totally new paradigm of React.js development.

Notes on Hooks

Hooks are like primitive composable components for React. With hooks, instead of using ES2015 classes and complex third party frameworks such as Redux, we can use simple function() expressions throughout.

Functional Programs

They are more functional - essentially they trade the complexity of how classes work for the complexity of how closures work. Hooks are more consistent with functional programming.

Side-Effects

I had previously associated side-effects with a negative connotation, but in this context, side-effects are very much intentional. A side-effect, or simply effect is employed anytime we perform a fetch operation or write something out to the console in a class component.

UseState

One of the most exciting parts of the Hooks API is the global state functionality. With useState, we have native functionality in React that might finally make it possible to avoid Redux entirely. At long last, React developers can make use of global state without cluttering up our applications with loads of messy connect functions and the 10 pounds of actions, reducers, and lifecycle triggers code it takes to get an ounce of functionality in React.

UseEffect

Use effect takes two arguments

Closures

Not only did hooks greatly simply my program, they allowed me to work more effectively with closures, and create more robust functional programming

Cleanups

Cleanup functions are powerful, because we can use functional expressions instead of ES2015 classes