Webpack Asset Map Plugin

Creates a json file that any server side technology can consume for asset declarations. Example output file:

{
  "assets": {
    "./smiley.jpeg": "/assets/smiley-db4f287d06928156270ca185fef0e026.jpeg",
    "./test-checklist.jpeg": "/assets/test-checklist-b3b0fe76f4485db43467876f664d1f62.jpeg"
  },
  "chunks": {
    "index": [
      "/assets/index-2c9c445686f51177cf62.js"
      "/assets/index-2c9c445686f51177cf62.css"
    ]
  }
}

The key is the relative path from the generated file to the image location in your source location. The value is the public url slug generated by webpack.

Usage

For webpack 1, use version 2.x of asset-map-webpack-plugin; for webpack 2/3, use version 3.x.

Add to the plugins array in your webpack config:

import AssetMapPlugin from 'asset-map-webpack-plugin';

export default {
  ...
  plugins: [
    /**
     * AssetMapPlugin
     *
     * @param {string} outputFile - What to name the output JSON file (written to the same directory as the other webpack assets)
     * @param {string} [relativeTo] - Key assets relative to this path, otherwise defaults to be relative to webpack `path`
     */
    new AssetMapPlugin(outputFilename, relativeTo)
  ]
};