At some point in a large enough frontend codebase, the build itself becomes the bottleneck. Thousands of components, dozens of teams, one monolithic bundle — something has to give. Module Federation is one of the more interesting solutions people have reached for, and it’s worth understanding properly before you commit to it.
What Is Module Federation? Module Federation is a feature introduced in Webpack 5 that lets JavaScript applications dynamically load code from other JavaScript applications at runtime — not at build time [1]. That single distinction is what makes it different from everything else.
I remember the first time I switched a project from CRA (which uses Webpack under the hood) to Vite. The dev server came up in under a second. I genuinely stared at the terminal for a moment, waiting for something else to happen. Nothing did. That was it — it was ready. That’s not a small improvement over Webpack. It’s a completely different experience.
What Is Vite? Vite (French for “fast”, pronounced “veet”) is a frontend build tool created by Evan You — the same person who built Vue.js [1]. It launched in 2020 and has been growing fast. As of 2025, Vite logs 53 million weekly npm downloads against Webpack’s 36 million [5]. Its GitHub stars tell the same story: 78,000 vs Webpack’s 66,000 [5].