vue hello world项目
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { STAGE_BASIC, STAGE_ADVANCED } = require("../OptimizationStages");
/** @typedef {import("../Chunk")} Chunk */
/** @typedef {import("../Compiler")} Compiler */
class RemoveEmptyChunksPlugin {
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
compiler.hooks.compilation.tap("RemoveEmptyChunksPlugin", compilation => {
/**
* @param {Iterable<Chunk>} chunks the chunks array
* @returns {void}
*/
const handler = chunks => {
const chunkGraph = compilation.chunkGraph;
for (const chunk of chunks) {
if (
chunkGraph.getNumberOfChunkModules(chunk) === 0 &&
!chunk.hasRuntime() &&
chunkGraph.getNumberOfEntryModules(chunk) === 0
) {
compilation.chunkGraph.disconnectChunk(chunk);
compilation.chunks.delete(chunk);
}
}
};
// TODO do it once
compilation.hooks.optimizeChunks.tap(
{
name: "RemoveEmptyChunksPlugin",
stage: STAGE_BASIC
},
handler
);
compilation.hooks.optimizeChunks.tap(
{
name: "RemoveEmptyChunksPlugin",
stage: STAGE_ADVANCED
},
handler
);
});
}
}
module.exports = RemoveEmptyChunksPlugin;