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Mapbox GL JS is an open-source JavaScript library using WebGL for rendering interactive 2D/3D maps, offering advantages over traditional 2D tile-based solutions like Leaflet through vector data support, customizable styles, and efficient data handling via WebGL.
React, an open‑source UI library created by Facebook, uses a virtual DOM and component‑based architecture—both class‑based and functional—to build modular, reusable interfaces, while JSX provides an XML‑like syntax that compiles to JavaScript, enhancing development efficiency and maintainability.
This article introduces React, the Facebook‑originated JavaScript UI library, explaining its rise in popularity and core concepts—JSX syntax that compiles to React.createElement calls, the virtual DOM that efficiently batches updates, and a component architecture that separates props and state for reusable, maintainable code.