Method groupChunksByExports

lib/optimize/SplitChunksPlugin.js:971–985

(module)

					 * @returns {Iterable<Chunk[]>} groups of chunks with equal exports
					 */
					const groupChunksByExports = (module) => {
						const exportsInfo = moduleGraph.getExportsInfo(module);
						/** @type {Map<string, Chunk[]>} */
						const groupedByUsedExports = new Map();
						for (const chunk of chunkGraph.getModuleChunksIterable(module)) {
							const key = exportsInfo.getUsageKey(chunk.runtime);
							const list = groupedByUsedExports.get(key);
							if (list !== undefined) {
								list.push(chunk);
							} else {
								groupedByUsedExports.set(key, [chunk]);
							}
						}
						return groupedByUsedExports.values();
					};

					/** @type {Map<Module, Iterable<Chunk[]>>} */
					const groupedByExportsMap = new Map();