Yes, it is possible to write JSX without using React. JSX (JavaScript XML) is a syntax extension for JavaScript that allows you to write HTML-like code in your JavaScript files. While React is the most popular library for using JSX, it is not the only option.

  There are other libraries and tools available that allow you to use JSX without React. Some examples include:

  1. Preact: Preact is a lightweight alternative to React that supports JSX. It provides a similar API to React but with a smaller bundle size.

  2. Inferno: Inferno is another lightweight alternative to React that supports JSX. It is known for its high performance and small bundle size.

  3. Vue.js: Vue.js is a popular JavaScript framework that also supports JSX. While Vue.js has its own template syntax, you can use JSX in Vue components by configuring the build system to transpile JSX.

  4. Babel: Babel is a JavaScript compiler that can transform JSX syntax into regular JavaScript syntax using plugins. By configuring Babel, you can use JSX in any JavaScript project without relying on a specific library.

  It's worth mentioning that while these options allow you to use JSX without React, React has become the de-facto standard for working with JSX due to its extensive features, ecosystem, and community support. However, if you prefer to use JSX without React, the above alternatives can be viable options.