I am requiring lodash modules individually, so that my JS build contains only the lodash code that I need (e.g. import map from 'lodash/map'
instead of import _ from 'lodash'
. (Actually, I'm using babel-plugin-lodash to automate this.) So nowhere in the code do I actually import the whole of 'lodash'
.
I would like webpack to put any lodash code that needs to be included into a vendor bundle. Following the webpack examples out there for splitting vendor and app bundles, I know how to include all of lodash in the vendor bundle (using the CommonsChunkPlugin). But I don't want to just use 'lodash'
as an entry point and pull in the whole library. Instead, I want to make all the modules that I actually import that start with lodash
to end up in the vendor bundle.
Any ideas?
Addition
The situation is further complicated by the fact that I build 3 bundles for each app: a vendor bundle, a bundle of stuff common across apps (which will use lodash modules), and the app-specific code (which will also use lodash modules).
Here are the key parts of my webpack config:
// ...
entry: {
specificApp: specificAppEntry,
appCommon: [appCommonEntry],
vendor: [listOfVendorJsLibraries],
},
// ...
plugins : [
new webpack.optimize.CommonsChunkPlugin({
names: ['appCommon', 'vendor'],
minChunks: Infinity,
}),
// ...
],
// ...
You can pass a minChunks
function to implement custom logic: https://webpack.github.io/docs/list-of-plugins.html#commonschunkplugin
You could use this to check if the module being imported is coming from node_modules/lodash
.
e.g. I use the following to pull everything imported from node_modules
into a vendor
bundle:
import path from 'path'
import webpack from 'webpack'
new webpack.optimize.CommonsChunkPlugin({
name: 'vendor',
minChunks: function (module, count) {
return (
module.resource &&
module.resource.indexOf(path.resolve('node_modules')) === 0
)
}
})
Working solution for use with CommonsChunkPlugin
, as posted in a comment:
minChunks: function(module, count) {
return module.resource && module.resource.indexOf('lodash') !== -1
}
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