Learn the key concepts behind React and how to use JSX elements and components to build lean and fast web front ends React, also known as ReactJS, is an open source JavaScript library for building ...

UIライブラリ「React」（React.js）および「Next.js」で、認証なしにリモートコード実行が可能になる重大なセキュリティ脆弱性「CVE-2025-55182」が存在することが明らかになった。この脆弱性は「React2Shell」とも呼ばれており、CVSSの基本値は満点の「10.0」。

As promised in February, Microsoft embraced the wildly popular React JavaScript library in Visual Studio 2015 by providing built-in support for its JSX syntax. So I took it for a spin. It works.

Unlike server-side rendering, React Server Components aim to fully replace client-side functionality with work done on the server. Let’s see how this works. React remains a flagship among front-end ...