HTML and CSS
Every front-end developer starts their journey with HTML and CSS. So before you start learning to react you should have a good command of writing HTML and CSS. You should know how to write semantic HTML tags, how to write CSS selectors, how to use classes, how to implement a CSS reset, box model, how to reset to border-box, flexbox, how to write responsive web applications including media queries, and how to build a frontend application using HTML and CSS.
Top 5 Skills You Must Know Before You Learn ReactJS
Do you know enough javascript before jumping into React??
Do you know how to use the map() method to loop through an array in javascript or ReactJS??
If you are learning React and you get stuck on these kinds of above questions then definitely you are making mistakes in your learning process. There is no doubt that ReactJS is the most popular library among frontend developers and its popularity is continuously increasing day by day. The website running on ReactJS looks beautiful and most of the beginners in development get attracted to ReactJs (developed by Facebook) as well but a common mistake that a lot of developers and experienced people make is jumping directly into ReactJS (or some other library and framework) without knowing the prerequisites. If you will directly go to React you will face a lot of problems while learning this library and in interviews as well.
You will get stuck during your interview if you are asked some questions related to ES6, JSX, Babel, Package Manager, basic JavaScript, or some other fundamental concepts. We are going to discuss some prerequisites and some basic concepts that you should know before you jump to React. These basic concepts will also help you to pick up some other frameworks and libraries of JavaScript in the future.