<ul><li>JavaScript in 2025 has become more powerful, expressive, and efficient, with new features like Iterator Helpers, structuredClone, Promise.withResolvers, Array .at(-1), and native Set operations that support union, intersection, and difference.</li><li>Google has launched Firebase Studio, an AI-powered dev environment integrated into the Firebase ecosystem, offering features like importing projects, prototyping agents, real-time previews, and one-click deploys to Firebase or Cloud Run.</li><li>A GitHub repository compiles over 50 backend testing strategies into a comprehensive playbook, including reliable patterns for mocking, Dockerized databases, test structures for API routes, and a showcase Node.js app with 40+ tests.</li><li>Microsoft has enforced licensing restrictions on popular language extensions in VS Code, redirecting extensions to official environments, leading to changes in alternative editors and potentially redefining the editor landscape.</li></ul>

JavaScript Becomes More Powerful Than Ever

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