You might be interested in What is React JS?
Any website that isn’t using React JS, will use HTML to reflect changes done to its DOM. This might not seem important at all if you’re developing a simple website that displays static data, but this is troublesome if you’re developing a complex website that constantly needs to update its data in real-time.
Why? Because HTML needs to reload the entire DOM every time someone interacts with something. This causes websites to be sluggish and not so interactive, as it is the user who needs to click to see any updates.
Whenever a website is made using JSX, React JS will create a Virtual DOM. This is a copy of the website’s DOM, which will be used to compare any changes done against the original DOM.
Every time that something changes in the Virtual DOM, it will be compared to the original one, and only the section that was changed will be updated. This allows developers to create more interactive and intuitive web applications, and also makes websites require less computing power.
While React Native isn’t exactly the same as React JS, it’s based on it. The main difference being that instead of being used to develop websites, it is used to create mobile applications. This allows developers who are well-versed in React JS to dwell in the world of app development.
It also allows developers to reuse code made for web applications to develop their own mobile apps, speeding up the development of new apps. The best part is that it can be used to develop apps compatible with both Android and iOS, making it a very versatile and useful tool.
While there are many more reasons to use React JS, these are the most prominent ones. As you can see, this is a very solid tool that should be adopted and used by developers who want to expand their skill-set and their careers. You should also check React’s website to stay up to date and join its community.
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