Reactive programming in web application development

React.js je JavaScript biblioteka za izgradnju korisničkih sučelja. Bazira se na komponentama koje mogu funkcionirati samostalno i kontrolirati vlastito stanje. Unutar izrađene aplikacije se koristi reaktivna izrada korisničkog sučelja tj. koristi se React.js. Upotrebom reaktivnog programiranja ubrzava se i olakšava proces izrade sučelja korištenjem React komponenti. Za izradu cijele aplikacije korišten je MERN sustav što znači da se koristila MongoDB baza podataka, Express.js okvir za back-end razvoj, React.js biblioteka za izradu korisničkog sučelja i Node.js kao serversko okruženje.React.js is a JavaScript library used for building user interfaces. It's based on components that can work on their own and control their own state. Reactive building of user interfaces was used in the created application i.e., it was built using React.js. Using reactive programming speeds and eases the process of building interfaces through use of React components. The whole app was made using the MERN system. This means that MongoDB was used for a database, Express.js for a back-end system, React.js library for building a user interface and Node.js as a server environment