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Bundle Analysis Pattern

Analyze and optimize JavaScript bundle size with Next.js bundle analyzer, tree shaking, smart imports, and CI-enforced size budgets.

What's Included#

  • Next.js bundle analyzer setup with treemap visualization
  • Package import optimization with optimizePackageImports configuration
  • Smart import patterns for date-fns, lodash, and icon libraries
  • Dynamic imports for heavy charting and editor libraries
  • Size limit configuration with per-chunk budgets
  • CI workflow for monitoring bundle size on pull requests

Usage#

Via CLI#

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Via AI Assistant#

Ask your AI assistant:

  • "Use the bundle analysis pattern from Bootspring"
  • "Apply the Bootspring bundle analysis pattern to my project"

Key Considerations#

  • Run bundle analysis regularly on each PR to catch size regressions early
  • Define and enforce size budgets per chunk to prevent gradual bundle bloat
  • Prefer lighter library alternatives (dayjs over moment, ky over axios, clsx over classnames)
  • Use dynamic imports for heavy features like charts, editors, and admin panels
  • Verify tree shaking is working by checking that unused exports are excluded from bundles

Related Patterns#