#use-built-ins

@babel/preset-env: useBuiltIns usage vs entry for serverless polyfill size

Goal: select the @babel/preset-env useBuiltIns mode that keeps polyfill payload small for a low-traffic serverless function without risking missing polyfills in production. The project uses Babel 7 and declares target environments in browserslist . Constraint: usage injects only polyfills detected as used per file, usually reducing bundle size, but it can mi

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serverlesspreset-envbabel