The short answer is yes – ReactJS does need HTML and CSS. In order to build complex, interactive user interfaces, developers rely on a combination of HTML, CSS, and JavaScript. ReactJS is a JavaScript library that simplifies the development process by providing a component-based approach. It allows developers to create reusable components that can be used across multiple applications.

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ReactJS is an open-source JavaScript library developed by Facebook in 2013. It is designed to help developers build user interfaces more efficiently and effectively by breaking down the UI into individual components. These components can then be reused throughout an application or website without having to recreate the code from scratch each time. ReactJS also uses a virtual DOM (Document Object Model) which keeps track of changes in the UI components and updates them only when necessary, resulting in faster page loads.

ReactJS works with HTML and CSS in order to create powerful user interfaces. HTML provides the structure for the page while CSS styles it. ReactJS components are written using JSX (JavaScript XML) syntax which combines HTML and JavaScript into one file. This makes it easier for developers to both read and write code since they don’t have to switch back and forth between different files.

Once the ReactJS components are written, they can then be combined with HTML elements such as

, , or

tags to create custom elements on the page. The ReactJS components also use props (properties) which allow developers to pass data from parent components to child components as well as control how each component behaves on the page.

Finally, CSS is used to style the page by adding colors, fonts, backgrounds, etc., as well as making any necessary adjustments for different devices or screen sizes. For example, media queries can be used to make sure that a website looks good on both desktop and mobile devices.

In conclusion, ReactJS does need HTML and CSS in order to create powerful user interfaces that look good on all devices. By combining these three technologies together, developers can create complex UIs quickly and easily using reusable components instead of having to write code from scratch each time. As more technology continues to emerge in this space, it’s important for developers to stay up-to-date with the latest trends so they can continue creating high-quality websites that provide exceptional user experiences.