Bundle Stats

BundleStats is analyzing the webpack stats and is providing information about what changed and what is going to be deployed.

- Bundle size and totals by file type(css, js, img, etc)
- Cache invalidation, Initial JS/CSS and other bundle specific metrics
- Assets report (entrypoint, initial, types, changed, delta)
- Modules report (changed, delta) by chunk
⭐ Side by side comparison for multiple jobs

Table of Contents

• Webpack plugin
  • Install
  • Webpack configuration
• CLI
  • Install as global dependency
  • Install as dev dependency
  • Webpack configuration
  • Usage
• Standalone web application
• ⚡ Running on CI

1. Webpack plugin

Install

npm install --dev bundle-stats

or

yarn add --dev bundle-stats

Webpack configuration

// webpack.config.js
const { BundleStatsWebpackPlugin } = require('bundle-stats');

module.exports = {
  ...,
  plugins: [
    new BundleStatsWebpackPlugin()
  ]
}

BundleStatsWebpackPlugin(options)

• html - output html report (default true).
• json - output json report (default false).
• outDir - output directory relative to output.path (default '').
• stats - Webpack stats options default:

  {
    stats: {
      context: WEBPACK_CONTEXT,
      assets: true,
      entrypoints: true,
      chunks: true,
      modules: true,
    }
  }

2. CLI

Install as global

npm install -g bundle-stats

or

yarn global add bundle-stats

Install as dev dependency

npm install --dev bundle-stats

or

yarn add --dev bundle-stats

Webpack configuration

The CLI is consuming the Webpack stats json. The following stats options are required:

{
  stats: {
    assets: true,
    entrypoints: true,
    chunks: true,
    modules: true
  }
}

Read more about Webpack stats configuration

Usage

$ bundle-stats -h
Usage: bundle-stats OPTIONS [WEBPACK_STATS_FILE]...

Options:
  --html         Save HTML report                      [boolean] [default: true]
  --json         Save JSON data                       [boolean] [default: false]
  --demo         Generate demo reports                          [default: false]
  -d, --out-dir  Output directory                            [default: "./dist"]
  -h, --help     Show help                                             [boolean]
  -v, --version  Show version number                                   [boolean]

$ bundle-stats --html --json __fixtures__/webpack-stats-0.json __fixtures__/webpack-stats-1.json
  ✔ Read Webpack stat files
  ✔ Gather data
  ✔ Generate reports
  ✔ Save reports

Reports saved:
- ./dist/bundle-stats.html
- ./dist/bundle-stats.json

3. Standalone web application

Use https://compare.relative-ci.com to compare Webpack/Lighthouse/Browsertime stats.

Read more

4. ⚡ Running on CI

Continuous monitoring with BundleStats on CI:

• Github Checks integration
• support for all major CI services (Travis CI, Circle CI, Jenkins, Gitlab CI, Codeship, etc)
• free for OpenSource

Read more about running BundleStats on CI (BETA)