7.9 kB minified + gzipped for v11.1.18. Measured with esbuild 0.25.9.
immer
v11.1.18
measured Sep 7, 2026
Raw
51 kB
Minified
21 kB
Min + Gzip
7.9 kB
Min + Brotli
7.1 kB
Sizes measure immer's own code with dependencies treated as external. Real-world size depends on your bundler, tree-shaking, and which exports you use.