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What is ReactJS?
ReactJS is an open-source JavaScript library for building highly interactive web applications developed and maintained by Meta.1 Using React, individuals can manipulate the virtual document object model (DOM) of a web page, which is a structured representation of the existing elements or user interface (UI).
In computer programming, libraries are collections of pre-made functional components that developers can reuse and adapt, which can save them the time and effort of building them from scratch.
React is declarative and component-based.2
Declarative: This kind of code describes the final desired state of the UI. The alternative is imperative, in which the code describes the step-by-step process to mutate the DOM.
Component-based: Encapsulated web components are independent, reusable chunks of code that return HTML. In ReactJS, components can maintain internal state data, which when updated will also update the rendered markup.
ReactJS libraries contain resources ranging from UI components such as textboxes and drop-down menus to special elements like animations, videos, and data visualizations. In addition to UI components, libraries can also contain resources that help developers manage other aspects of the web development process, such as debugging or testing.
ReactJS is commonly used for building web applications or software that’s accessed through a web browser, such as a website.3
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ReactJS course curriculum
ReactJS is not a coding language; it’s a library for developing web applications in JavaScript. To effectively use ReactJS, beginners must first know how to code with JavaScript and other front-end languages like HTML and CSS. JSX, a syntax extension to JavaScript, is not required for ReactJS, but is a useful feature and should be easier to learn once familiar with JavaScript.4
Individuals interested in getting started with this powerful UI library will find that there are many free online resources available. Library documentation and short tutorials from Facebook provide an introductory and brief overview of ReactJS.
Another option for beginners is to learn ReactJS as part of an immersive web development course, such as a web developer boot camp, or as part of a computer science bachelor’s degree. In addition to building up your knowledge on the fundamentals of front-end languages, these courses cover other vital aspects of front-end development, such as server-side architecture, RESTful API design, and alternative frameworks like Angular and Bootstrap.
Experienced developers seeking to level up their careers can pursue a master’s degree in fields like computer science, data science, cybersecurity, or IT.
Jobs that use ReactJS
Careers with ReactJS span across industries, from tech and e-commerce to retail and automotive. Whether you’re seeking to work in a startup or join a large corporation as a front-end developer, ReactJS could be a useful skill.
As with most software development jobs, React developer positions are divided into junior, mid-level, and senior levels. In a team setting, junior and mid-level developers often take care of the actual coding, while senior developers are responsible for tasks such as project management, strategic planning, and stakeholder communications.
Learners aspiring to land a junior React developer role will need to demonstrate thorough knowledge of ReactJS, as well as any other front-end technologies the position requires. A bachelor’s degree or certificate from a coding boot camp may help you acquire the knowledge necessary for these roles, but many potential employers may also ask for a portfolio of projects showcasing your skills. Beginners can build their portfolios with class projects and apprenticeships or internships. Another way you can boost your portfolio is by adding personal coding projects or doing freelance work.
Become a React developer
Employment qualifications for a career as a front-end web developer will vary depending on the industry and job. Some employers may require front-end developers to have at least a bachelor’s degree in fields such as computer science, data science, or IT. However, there are other opportunities for developers who transitioned into the field through React courses such as coding boot camps and online tutorials.
Qualifications for ReactJS developers will vary across industries, but often include:
Proficiency coding in JavaScript, HTML, and CSS
Experience working with client-side JavaScript frameworks such as ReactJS, React Native, Bootstrap, Angular, or Vue
Knowledge of server-side JavaScript frameworks such as NodeJS and ExpressJS
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Frequently Asked Questions
React — A Javascript Library For Building User Interfaces. (2022). Meta Platforms, Inc. Retrieved December 7, 2022.
React. (2022). Facebook on Github. Retrieved December 14, 2022.
What Is React.js? (Uses, Examples, & More). (2022). Hubspot. Retrieved December 7, 2022.
Getting started with React. (2022). Mozilla. Retrieved December 7, 2022.