webpack
Version:
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.
70 lines (69 loc) • 2.29 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
function CommonsChunkPlugin(chunkName, filenameTemplate, entryPoints, minCount) {
if(typeof filenameTemplate !== "string") {
minCount = entryPoints;
entryPoints = filenameTemplate
filenameTemplate = chunkName;
}
if(typeof entryPoints === "number") {
minCount = entryPoints;
entryPoints = undefined;
}
this.chunkName = chunkName;
this.filenameTemplate = filenameTemplate;
this.minCount = minCount;
this.entryPoints = entryPoints;
}
module.exports = CommonsChunkPlugin;
CommonsChunkPlugin.prototype.apply = function(compiler) {
var chunkName = this.chunkName;
var filenameTemplate = this.filenameTemplate;
var minCount = this.minCount;
var entryPoints = this.entryPoints;
compiler.plugin("this-compilation", function(compilation) {
compilation.plugin(["optimize-chunks", "optimize-extracted-chunks"], function(chunks) {
var commonModulesCount = [];
var commonModules = [];
var commonChunk = chunks.filter(function(chunk) {
return chunk.name === chunkName;
})[0] || this.addChunk(chunkName);
var usedChunks = chunks.filter(function(chunk) {
if(chunk === commonChunk) return false;
if(!chunk.entry) return false;
if(!entryPoints) return true;
return entryPoints.indexOf(chunk.name) >= 0;
});
usedChunks.forEach(function(chunk) {
chunk.modules.forEach(function(module) {
var idx = commonModules.indexOf(module);
if(idx < 0) {
commonModules.push(module);
commonModulesCount.push(1);
} else {
commonModulesCount[idx]++;
}
});
});
commonModulesCount.forEach(function(count, idx) {
if(count >= (minCount || Math.max(2, usedChunks.length))) {
var module = commonModules[idx];
usedChunks.forEach(function(chunk) {
module.removeChunk(chunk);
});
commonChunk.addModule(module);
module.addChunk(commonChunk);
}
});
usedChunks.forEach(function(chunk) {
chunk.parents = [commonChunk];
commonChunk.chunks.push(chunk);
chunk.entry = false;
});
commonChunk.initial = commonChunk.entry = true;
commonChunk.filenameTemplate = filenameTemplate;
});
});
};