Frontend : es6 spresad rest Routing SPA FORMS Events localstoreage map API Theme Hosting
Backend:
NPM COMMAD SEssion connenction crud API
spread oprator ... (copy object)
rest parameter ... (dynamic parameter)
JSON.stringyfy (convert object into string)
JSON.parse() (convert string in object/json)
localstorage which save permanetdata in browser storage
string literal ${variable}
react fragment <> </>
JSX javascript and xml
sum of two num
npm install react-router-dom