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ChunkPrefetchPreloadPlugin.js
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Mon, Feb 10, 21:25

ChunkPrefetchPreloadPlugin.js
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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 ChunkPrefetchFunctionRuntimeModule = require("./ChunkPrefetchFunctionRuntimeModule");
const ChunkPrefetchStartupRuntimeModule = require("./ChunkPrefetchStartupRuntimeModule");
const ChunkPrefetchTriggerRuntimeModule = require("./ChunkPrefetchTriggerRuntimeModule");
/** @typedef {import("../Compiler")} Compiler */
class ChunkPrefetchPreloadPlugin {
/**
* @param {Compiler} compiler the compiler
* @returns {void}
*/
apply(compiler) {
compiler.hooks.compilation.tap(
"ChunkPrefetchPreloadPlugin",
compilation => {
compilation.hooks.additionalChunkRuntimeRequirements.tap(
"ChunkPrefetchPreloadPlugin",
(chunk, set) => {
const { chunkGraph } = compilation;
if (chunkGraph.getNumberOfEntryModules(chunk) === 0) return;
const startupChildChunks = chunk.getChildIdsByOrders(chunkGraph);
if (startupChildChunks.prefetch) {
set.add(RuntimeGlobals.prefetchChunk);
set.add(RuntimeGlobals.startupOnlyAfter);
compilation.addRuntimeModule(
chunk,
new ChunkPrefetchStartupRuntimeModule(
"prefetch",
RuntimeGlobals.prefetchChunk,
startupChildChunks.prefetch
)
);
}
}
);
compilation.hooks.additionalTreeRuntimeRequirements.tap(
"ChunkPrefetchPreloadPlugin",
(chunk, set) => {
const { chunkGraph } = compilation;
const chunkMap = chunk.getChildIdsByOrdersMap(chunkGraph, false);
if (chunkMap.prefetch) {
set.add(RuntimeGlobals.prefetchChunk);
compilation.addRuntimeModule(
chunk,
new ChunkPrefetchTriggerRuntimeModule(
"prefetch",
RuntimeGlobals.prefetchChunk,
chunkMap.prefetch,
true
)
);
}
if (chunkMap.preload) {
set.add(RuntimeGlobals.preloadChunk);
compilation.addRuntimeModule(
chunk,
new ChunkPrefetchTriggerRuntimeModule(
"preload",
RuntimeGlobals.preloadChunk,
chunkMap.preload,
false
)
);
}
}
);
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.prefetchChunk)
.tap("ChunkPrefetchPreloadPlugin", (chunk, set) => {
compilation.addRuntimeModule(
chunk,
new ChunkPrefetchFunctionRuntimeModule(
"prefetch",
RuntimeGlobals.prefetchChunk,
RuntimeGlobals.prefetchChunkHandlers
)
);
set.add(RuntimeGlobals.prefetchChunkHandlers);
});
compilation.hooks.runtimeRequirementInTree
.for(RuntimeGlobals.preloadChunk)
.tap("ChunkPrefetchPreloadPlugin", (chunk, set) => {
compilation.addRuntimeModule(
chunk,
new ChunkPrefetchFunctionRuntimeModule(
"preload",
RuntimeGlobals.preloadChunk,
RuntimeGlobals.preloadChunkHandlers
)
);
set.add(RuntimeGlobals.preloadChunkHandlers);
});
}
);
}
}
module.exports = ChunkPrefetchPreloadPlugin;

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