JavaScript used to be known as the language for building websites and web applications especially with some of its frameworks such as React, Vue, and Angular but over time (as early as 2009), it became possible for JavaScript to run outside the browser with the emergence of Node.js, an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside a web browser. This has led to the ability to use JavaScript for a whole lot more than just web applications, and one of which is building desktop applications using Electron.

https://www.smashingmagazine.com/2020/07/desktop-apps-electron-vue-javascript/