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The TypeScript vs JavaScript Debate: Developers Can't Reach a Consensus
In 2019, seven years after the first public release of TypeScript, the debate over whether to use static typing in web development reached a new peak. According to the Stack Overflow Developer Survey 2019, TypeScript entered the top 5 most loved programming languages, with 73.1% positive feedback. However, its main competitor — JavaScript — remained the most used language (67.8% of respondents).
"TypeScript is not a replacement for JavaScript, it's a superset that makes code more predictable and secure, especially in large projects," stated Andrey Sitnik, lead developer at EPAM Systems, at the HolyJS 2019 conference in St. Petersburg. — "We introduced TypeScript into a project with 200,000 lines of code, and the number of type-related bugs decreased by 40% in the first three months."
Nevertheless, not everyone shares this enthusiasm. John Resig, creator of jQuery, noted in his blog: "TypeScript adds complexity where it can be avoided. For small teams and prototypes, JavaScript with JSDoc annotations is often more than sufficient." Critics also point to the need for additional configuration (tsconfig.json) and compilation time, which can slow down the development cycle.
According to GitHub Octoverse 2019, the number of pull requests with TypeScript grew by 93% compared to 2018, and the number of repositories in this language doubled. At the same time, JavaScript remains the absolute leader in total code volume. Interestingly, Google Trends shows a steady increase in search queries for "TypeScript vs JavaScript" specifically in 2019, confirming high interest in the topic.
Experts agree that the choice between TypeScript and JavaScript depends on the context. "If you're writing a library that thousands of developers will use — TypeScript is mandatory. If you're building a landing page or a small script — start with JavaScript," summarizes Michael Chan, an engineer from Google, in his talk at JSConf EU 2019.
While the community has not reached a consensus, one thing remains clear: TypeScript has firmly established its niche in enterprise development, while JavaScript remains a universal tool for fast and flexible work. Which path you choose is entirely up to you.
