feat(webpack): ignore chunks

Allow the webpack plugin to ignore specific chunk names when writing the manifest file.

README.md

@@ -1222,6 +1222,12 @@ export default {
 This will create a file (`opts.filename`) which you can import to map modules
 to bundles.
 
+### `opts.filename`
+Required, the destination file for writing react-loadable module data
+
+### `opts.ignoreChunkNames`
+Optional, an array of webpack chunk names to exclude from the module data
+
 [Read more about mapping modules to bundles](#mapping-loaded-modules-to-bundles).
 
 ### `getBundles`

src/webpack.js

@@ -3,12 +3,23 @@ const fs = require('fs');
 const path = require('path');
 const url = require('url');
 
-function buildManifest(compiler, compilation) {
+function buildManifest(compiler, compilation, ignoreChunkNames) {
   let context = compiler.options.context;
   let manifest = {};
 
   compilation.chunks.forEach(chunk => {
-    if (chunk.name !== 'main') {
+    // Determine if the chunk should be ignored
+    const chunkName = typeof chunk.name === 'undefined' ? 'undefined' : chunk.name === null ? 'null' : chunk.name;
+    const ignoreChunk = ignoreChunkNames.length === 0 ? false : ignoreChunkNames.some(chunkNameCondition => {
+      if (chunkNameCondition instanceof RegExp) {
+        chunkNameCondition.lastIndex = 0; // reset in-case its a global regexp
+        return chunkNameCondition.test(chunkName);
+      }
+
+      return chunkNameCondition === chunkName;
+    });
+
+    if (!ignoreChunk) {
       chunk.files.forEach(file => {
         chunk.forEachModule(module => {
           let id = module.id;
@@ -35,11 +46,13 @@ function buildManifest(compiler, compilation) {
 class ReactLoadablePlugin {
   constructor(opts = {}) {
     this.filename = opts.filename;
+    const ignoreChunkNames = opts.ignoreChunkNames || [];
+    this.ignoreChunkNames = Array.isArray(ignoreChunkNames) ? ignoreChunkNames : [ignoreChunkNames];
   }
 
   apply(compiler) {
     compiler.plugin('emit', (compilation, callback) => {
-      const manifest = buildManifest(compiler, compilation);
+      const manifest = buildManifest(compiler, compilation, this.ignoreChunkNames);
       var json = JSON.stringify(manifest, null, 2);
       const outputDirectory = path.dirname(this.filename);
       try {