工作端小程序
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const ExportWebpackRequireRuntimeModule = require("./ExportWebpackRequireRuntimeModule");
const ModuleChunkLoadingRuntimeModule = require("./ModuleChunkLoadingRuntimeModule");
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compiler")} Compiler */
const PLUGIN_NAME = "ModuleChunkLoadingPlugin";
class ModuleChunkLoadingPlugin {
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
compiler.hooks.thisCompilation.tap(PLUGIN_NAME, compilation => {
const globalChunkLoading = compilation.outputOptions.chunkLoading;
/**
* @param {Chunk} chunk chunk to check
* @returns {boolean} true, when the plugin is enabled for the chunk
*/
const isEnabledForChunk = chunk => {
const options = chunk.getEntryOptions();
const chunkLoading =
options && options.chunkLoading !== undefined
? options.chunkLoading
: globalChunkLoading;
return chunkLoading === "import";
};
const onceForChunkSet = new WeakSet();
/**
* @param {Chunk} chunk chunk to check
* @param {Set<string>} set runtime requirements
*/
const handler = (chunk, set) => {
if (onceForChunkSet.has(chunk)) return;
onceForChunkSet.add(chunk);
if (!isEnabledForChunk(chunk)) return;
set.add(RuntimeGlobals.moduleFactoriesAddOnly);
set.add(RuntimeGlobals.hasOwnProperty);
compilation.addRuntimeModule(
chunk,
new ModuleChunkLoadingRuntimeModule(set)
);
};
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.ensureChunkHandlers)
.tap(PLUGIN_NAME, handler);
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.baseURI)
.tap(PLUGIN_NAME, handler);
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.externalInstallChunk)
.tap(PLUGIN_NAME, handler);
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.onChunksLoaded)
.tap(PLUGIN_NAME, handler);
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.hmrDownloadUpdateHandlers)
.tap(PLUGIN_NAME, handler);
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.hmrDownloadManifest)
.tap(PLUGIN_NAME, handler);
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.externalInstallChunk)
.tap(PLUGIN_NAME, (chunk, set, { chunkGraph }) => {
if (!isEnabledForChunk(chunk)) return;
// If a chunk contains an entryModule, all exports are determined by the entryModule.
// The ExportWebpackRequireRuntimeModule is for internal use only and not exposed to users.
if (chunkGraph.getNumberOfEntryModules(chunk) > 0) return;
compilation.addRuntimeModule(
chunk,
new ExportWebpackRequireRuntimeModule()
);
});
// We need public path only when we prefetch/preload chunk or public path is not `auto`
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.prefetchChunkHandlers)
.tap(PLUGIN_NAME, (chunk, set) => {
if (!isEnabledForChunk(chunk)) return;
set.add(RuntimeGlobals.publicPath);
});
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.preloadChunkHandlers)
.tap(PLUGIN_NAME, (chunk, set) => {
if (!isEnabledForChunk(chunk)) return;
set.add(RuntimeGlobals.publicPath);
});
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.ensureChunkHandlers)
.tap(PLUGIN_NAME, (chunk, set) => {
if (!isEnabledForChunk(chunk)) return;
if (compilation.outputOptions.publicPath !== "auto") {
set.add(RuntimeGlobals.publicPath);
}
set.add(RuntimeGlobals.getChunkScriptFilename);
});
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.hmrDownloadUpdateHandlers)
.tap(PLUGIN_NAME, (chunk, set) => {
if (!isEnabledForChunk(chunk)) return;
set.add(RuntimeGlobals.publicPath);
set.add(RuntimeGlobals.loadScript);
set.add(RuntimeGlobals.getChunkUpdateScriptFilename);
set.add(RuntimeGlobals.moduleCache);
set.add(RuntimeGlobals.hmrModuleData);
set.add(RuntimeGlobals.moduleFactoriesAddOnly);
});
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.hmrDownloadManifest)
.tap(PLUGIN_NAME, (chunk, set) => {
if (!isEnabledForChunk(chunk)) return;
set.add(RuntimeGlobals.publicPath);
set.add(RuntimeGlobals.getUpdateManifestFilename);
});
compilation.hooks.additionalTreeRuntimeRequirements.tap(
PLUGIN_NAME,
(chunk, set, { chunkGraph }) => {
if (chunkGraph.hasChunkEntryDependentChunks(chunk)) {
set.add(RuntimeGlobals.externalInstallChunk);
}
}
);
});
}
}
module.exports = ModuleChunkLoadingPlugin;