Part 4 React components | React class components | Functional React components

Component:- ---------- - A component is a function/class which will display something to the user. It is the building block of the react. - We can write components once and reuse the entire project. - It helps to avoid duplicate code. - A component may have CSS and js files. - Component name must be written using camel case and starts with the capital as shown below. - Components come in two types, Class components, and Function components. 1. function based components 2. class-based components Note:- In older React code bases, you may find Class components primarily used. function components are introduced from React 16.8 2019 - When the state object changes, the component re-renders. - Refer to the state object anywhere in the component by using this. state.property name syntax: