Suggest an editImprove this articleRefine the answer for “What is esbuild?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**esbuild** is an ultra-fast bundler and transpiler for JavaScript and TypeScript, written in **Go**, used for building, transforming, and minifying frontend code. **Key point:** esbuild is a fast, low-level tool for building and transforming JS/TS code that delivers speed and optimizations unattainable for JavaScript-based bundlers.Shown above the full answer for quick recall.Answer (EN)Image**esbuild** is an ultra-fast bundler and transpiler for JavaScript and TypeScript, written in **Go**. It is used for building, transforming, and minifying frontend code, and is known primarily for its high performance: tens of times faster than JavaScript-based tools (for example, Babel or Webpack loaders). --- ### **What esbuild can do** - transpile **JS/TS** into code supported by browsers - bundle a project into **bundles** - minify and optimize JS and CSS - act as a **replacement for Babel + Terser** in a single tool - support **ESM, CommonJS, tree shaking, and source maps** --- ### **Why it is so fast** - written in Go, it runs as **compiled binary code**, not through an interpreter - effectively uses **multithreading** - does not repeat work when it is not needed (optimizations inside the pipeline) --- ### **Where it is used** - as a standalone bundler (CLI or API) - inside other tools: **Vite, Turbopack, Snowpack, Nx**, and others --- ### **Summary** **esbuild is a fast, low-level tool for building and transforming JS/TS code that delivers speed and optimizations unattainable for JavaScript-based bundlers.**For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.