API reference › @evolu/common › Platform › isDev

const isDev: boolean;

Defined in: packages/common/src/Platform.ts:24

True outside production builds.

Bundlers (webpack, Vite, esbuild, Metro) replace the text process.env.NODE_ENV statically at build time, so in production bundles this expression folds to false and code behind it is dead-code-eliminated — the same mechanism React uses. The typeof guard makes the runtime read safe where no bundler ran, such as un-bundled browser ESM, where it fails closed to production behavior. Node.js reads it natively; React Native polyfills it. A missing NODE_ENV counts as development, matching React semantics.