source: trip-planner-front/node_modules/webpack/lib/runtime/StartupChunkDependenciesRuntimeModule.js@ 6a3a178

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");

class StartupChunkDependenciesRuntimeModule extends RuntimeModule {
        constructor(asyncChunkLoading) {
                super("startup chunk dependencies", RuntimeModule.STAGE_TRIGGER);
                this.asyncChunkLoading = asyncChunkLoading;
        }

        /**
         * @returns {string} runtime code
         */
        generate() {
                const { chunkGraph, chunk, compilation } = this;
                const { runtimeTemplate } = compilation;
                const chunkIds = Array.from(
                        chunkGraph.getChunkEntryDependentChunksIterable(chunk)
                ).map(chunk => {
                        return chunk.id;
                });
                return Template.asString([
                        `var next = ${RuntimeGlobals.startup};`,
                        `${RuntimeGlobals.startup} = ${runtimeTemplate.basicFunction(
                                "",
                                !this.asyncChunkLoading
                                        ? chunkIds
                                                        .map(
                                                                id => `${RuntimeGlobals.ensureChunk}(${JSON.stringify(id)});`
                                                        )
                                                        .concat("return next();")
                                        : chunkIds.length === 1
                                        ? `return ${RuntimeGlobals.ensureChunk}(${JSON.stringify(
                                                        chunkIds[0]
                                          )}).then(next);`
                                        : chunkIds.length > 2
                                        ? [
                                                        // using map is shorter for 3 or more chunks
                                                        `return Promise.all(${JSON.stringify(chunkIds)}.map(${
                                                                RuntimeGlobals.ensureChunk
                                                        }, __webpack_require__)).then(next);`
                                          ]
                                        : [
                                                        // calling ensureChunk directly is shorter for 0 - 2 chunks
                                                        "return Promise.all([",
                                                        Template.indent(
                                                                chunkIds
                                                                        .map(
                                                                                id => `${RuntimeGlobals.ensureChunk}(${JSON.stringify(id)})`
                                                                        )
                                                                        .join(",\n")
                                                        ),
                                                        "]).then(next);"
                                          ]
                        )};`
                ]);
        }
}

module.exports = StartupChunkDependenciesRuntimeModule;