How AI coding tools are contributing to the popularity of JavaScript
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The article explains that AI coding tools have contributed to the growing dominance of JavaScript and TypeScript, with TypeScript becoming the most used language on GitHub in August 2025, marking the largest shift in GitHub's language rankings in a decade. Contrary to predictions that AI would make language choice less important, the market has narrowed toward the JavaScript family, which is both the most used and fastest growing on GitHub. This is because AI models perform best on code they have seen most, primarily JavaScript, TypeScript, and React, leading to better output for these languages and a wider productivity gap for less common frameworks. Additionally, the front ends of AI products are largely built in JavaScript and TypeScript, and type systems have become important guardrails for catching errors in generated code. The article cites data such as GitHub reporting 2.64 million monthly TypeScript contributors and a 178% increase in public repositories using LLM SDKs by the end of 2025. It concludes that verification, not code generation, has become the limiting factor, shifting the bottleneck from writing code to reviewing it. This changes expectations for developers, as review capacity is limited and cannot scale as quickly as code generation capacity.
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