diff options
Diffstat (limited to 'node_modules/webpack/lib/esm/ModuleChunkLoadingRuntimeModule.js')
| -rw-r--r-- | node_modules/webpack/lib/esm/ModuleChunkLoadingRuntimeModule.js | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/esm/ModuleChunkLoadingRuntimeModule.js b/node_modules/webpack/lib/esm/ModuleChunkLoadingRuntimeModule.js new file mode 100644 index 00000000..c29f0f50 --- /dev/null +++ b/node_modules/webpack/lib/esm/ModuleChunkLoadingRuntimeModule.js @@ -0,0 +1,249 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php +*/ + +"use strict"; + +const { SyncWaterfallHook } = require("tapable"); +const Compilation = require("../Compilation"); +const RuntimeGlobals = require("../RuntimeGlobals"); +const RuntimeModule = require("../RuntimeModule"); +const Template = require("../Template"); +const { + getChunkFilenameTemplate, + chunkHasJs +} = require("../javascript/JavascriptModulesPlugin"); +const { getInitialChunkIds } = require("../javascript/StartupHelpers"); +const compileBooleanMatcher = require("../util/compileBooleanMatcher"); +const { getUndoPath } = require("../util/identifier"); + +/** @typedef {import("../Chunk")} Chunk */ +/** @typedef {import("../ChunkGraph")} ChunkGraph */ + +/** + * @typedef {Object} JsonpCompilationPluginHooks + * @property {SyncWaterfallHook<[string, Chunk]>} linkPreload + * @property {SyncWaterfallHook<[string, Chunk]>} linkPrefetch + */ + +/** @type {WeakMap<Compilation, JsonpCompilationPluginHooks>} */ +const compilationHooksMap = new WeakMap(); + +class ModuleChunkLoadingRuntimeModule extends RuntimeModule { + /** + * @param {Compilation} compilation the compilation + * @returns {JsonpCompilationPluginHooks} hooks + */ + static getCompilationHooks(compilation) { + if (!(compilation instanceof Compilation)) { + throw new TypeError( + "The 'compilation' argument must be an instance of Compilation" + ); + } + let hooks = compilationHooksMap.get(compilation); + if (hooks === undefined) { + hooks = { + linkPreload: new SyncWaterfallHook(["source", "chunk"]), + linkPrefetch: new SyncWaterfallHook(["source", "chunk"]) + }; + compilationHooksMap.set(compilation, hooks); + } + return hooks; + } + + /** + * @param {ReadonlySet<string>} runtimeRequirements runtime requirements + */ + constructor(runtimeRequirements) { + super("import chunk loading", RuntimeModule.STAGE_ATTACH); + this._runtimeRequirements = runtimeRequirements; + } + + /** + * @private + * @param {Chunk} chunk chunk + * @param {string} rootOutputDir root output directory + * @returns {string} generated code + */ + _generateBaseUri(chunk, rootOutputDir) { + const options = chunk.getEntryOptions(); + if (options && options.baseUri) { + return `${RuntimeGlobals.baseURI} = ${JSON.stringify(options.baseUri)};`; + } + const compilation = /** @type {Compilation} */ (this.compilation); + const { + outputOptions: { importMetaName } + } = compilation; + return `${RuntimeGlobals.baseURI} = new URL(${JSON.stringify( + rootOutputDir + )}, ${importMetaName}.url);`; + } + + /** + * @returns {string | null} runtime code + */ + generate() { + const compilation = /** @type {Compilation} */ (this.compilation); + const chunkGraph = /** @type {ChunkGraph} */ (this.chunkGraph); + const chunk = /** @type {Chunk} */ (this.chunk); + const { + runtimeTemplate, + outputOptions: { importFunctionName } + } = compilation; + const fn = RuntimeGlobals.ensureChunkHandlers; + const withBaseURI = this._runtimeRequirements.has(RuntimeGlobals.baseURI); + const withExternalInstallChunk = this._runtimeRequirements.has( + RuntimeGlobals.externalInstallChunk + ); + const withLoading = this._runtimeRequirements.has( + RuntimeGlobals.ensureChunkHandlers + ); + const withOnChunkLoad = this._runtimeRequirements.has( + RuntimeGlobals.onChunksLoaded + ); + const withHmr = this._runtimeRequirements.has( + RuntimeGlobals.hmrDownloadUpdateHandlers + ); + const conditionMap = chunkGraph.getChunkConditionMap(chunk, chunkHasJs); + const hasJsMatcher = compileBooleanMatcher(conditionMap); + const initialChunkIds = getInitialChunkIds(chunk, chunkGraph, chunkHasJs); + + const outputName = compilation.getPath( + getChunkFilenameTemplate(chunk, compilation.outputOptions), + { + chunk, + contentHashType: "javascript" + } + ); + const rootOutputDir = getUndoPath( + outputName, + /** @type {string} */ (compilation.outputOptions.path), + true + ); + + const stateExpression = withHmr + ? `${RuntimeGlobals.hmrRuntimeStatePrefix}_module` + : undefined; + + return Template.asString([ + withBaseURI + ? this._generateBaseUri(chunk, rootOutputDir) + : "// no baseURI", + "", + "// object to store loaded and loading chunks", + "// undefined = chunk not loaded, null = chunk preloaded/prefetched", + "// [resolve, Promise] = chunk loading, 0 = chunk loaded", + `var installedChunks = ${ + stateExpression ? `${stateExpression} = ${stateExpression} || ` : "" + }{`, + Template.indent( + Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 0`).join( + ",\n" + ) + ), + "};", + "", + withLoading || withExternalInstallChunk + ? `var installChunk = ${runtimeTemplate.basicFunction("data", [ + runtimeTemplate.destructureObject( + ["ids", "modules", "runtime"], + "data" + ), + '// add "modules" to the modules object,', + '// then flag all "ids" as loaded and fire callback', + "var moduleId, chunkId, i = 0;", + "for(moduleId in modules) {", + Template.indent([ + `if(${RuntimeGlobals.hasOwnProperty}(modules, moduleId)) {`, + Template.indent( + `${RuntimeGlobals.moduleFactories}[moduleId] = modules[moduleId];` + ), + "}" + ]), + "}", + `if(runtime) runtime(${RuntimeGlobals.require});`, + "for(;i < ids.length; i++) {", + Template.indent([ + "chunkId = ids[i];", + `if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) && installedChunks[chunkId]) {`, + Template.indent("installedChunks[chunkId][0]();"), + "}", + "installedChunks[ids[i]] = 0;" + ]), + "}", + withOnChunkLoad ? `${RuntimeGlobals.onChunksLoaded}();` : "" + ])}` + : "// no install chunk", + "", + withLoading + ? Template.asString([ + `${fn}.j = ${runtimeTemplate.basicFunction( + "chunkId, promises", + hasJsMatcher !== false + ? Template.indent([ + "// import() chunk loading for javascript", + `var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`, + 'if(installedChunkData !== 0) { // 0 means "already installed".', + Template.indent([ + "", + '// a Promise means "currently loading".', + "if(installedChunkData) {", + Template.indent([ + "promises.push(installedChunkData[1]);" + ]), + "} else {", + Template.indent([ + hasJsMatcher === true + ? "if(true) { // all chunks have JS" + : `if(${hasJsMatcher("chunkId")}) {`, + Template.indent([ + "// setup Promise in chunk cache", + `var promise = ${importFunctionName}(${JSON.stringify( + rootOutputDir + )} + ${ + RuntimeGlobals.getChunkScriptFilename + }(chunkId)).then(installChunk, ${runtimeTemplate.basicFunction( + "e", + [ + "if(installedChunks[chunkId] !== 0) installedChunks[chunkId] = undefined;", + "throw e;" + ] + )});`, + `var promise = Promise.race([promise, new Promise(${runtimeTemplate.expressionFunction( + `installedChunkData = installedChunks[chunkId] = [resolve]`, + "resolve" + )})])`, + `promises.push(installedChunkData[1] = promise);` + ]), + hasJsMatcher === true + ? "}" + : "} else installedChunks[chunkId] = 0;" + ]), + "}" + ]), + "}" + ]) + : Template.indent(["installedChunks[chunkId] = 0;"]) + )};` + ]) + : "// no chunk on demand loading", + "", + withExternalInstallChunk + ? Template.asString([ + `${RuntimeGlobals.externalInstallChunk} = installChunk;` + ]) + : "// no external install chunk", + "", + withOnChunkLoad + ? `${ + RuntimeGlobals.onChunksLoaded + }.j = ${runtimeTemplate.returningFunction( + "installedChunks[chunkId] === 0", + "chunkId" + )};` + : "// no on chunks loaded" + ]); + } +} + +module.exports = ModuleChunkLoadingRuntimeModule; |