Prevent Broken JavaScript Interop in ClojureScript Advanced Builds
Use externs files to protect external JavaScript names when compiling ClojureScript with :optimizations :advanced.
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Use externs files to protect external JavaScript names when compiling ClojureScript with :optimizations :advanced.
ClojureScript's :advanced compilation can shrink a Reagent app from 180 KB to 45 KB gzipped, but only if you describe every external JavaScript dependency in externs files. This post shows the size gains, the externs pitfall, and a practical CI profile strategy.
Use ClojureScript :advanced compilation for smaller release bundles while protecting JavaScript APIs with externs and verifying every interop boundary before deploy.
Shrink your ClojureScript bundle by enabling :advanced compiler optimizations and adding proper externs for external libraries like lodash. Follow a concrete example, verify runtime integrity, and understand the trade‑offs.
Learn how to shrink ClojureScript output by turning on advanced compilation and letting the compiler infer externs, with a step‑by‑step Reagent example and verification tips.
Dev build works, release build throws 'undefined is not a function'? Diagnose ClojureScript :advanced compilation property renaming with pseudo-names, externs, and goog.object fixes.
A step‑by‑step diagnostic guide for fixing missing externs in ClojureScript :advanced builds, with checks, fixes, and verification steps.
Advanced Closure Compiler builds shrink ClojureScript bundles but risk breaking external libs. This guide shows how to enable :advanced, declare externs, export symbols, and verify the output for a robust production build.
Learn how to use Haxe externs to get compile-time type safety when calling JavaScript libraries, with a lodash chunk example and conditional compilation tips.