Dan Abramov • 8/4/2019

How Does the Development Mode Work?

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This technical article explains how JavaScript bundlers, like webpack, enable different code to run in development and production. It details how React uses development mode to include helpful warnings and checks, which are then stripped out in production builds to optimize bundle size and performance, using constants like __DEV__ or process.env.NODE_ENV.

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#JavaScript #development mode #dead code elimination
How Does the Development Mode Work?

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