How to exclude moment locales from angular build?

There is another solution in this Angular Issue: https://github.com/angular/angular-cli/issues/6137#issuecomment-387708972

Add a custom path with the name "moment" so it is by default resolved to the JS file you want:

"compilerOptions": {
    "paths": {
      "moment": [
        "./node_modules/moment/min/moment.min.js"
      ]
    }
}

If you don't want to use any third party libraries the simplest way to do this is to add the following in compilerOptions of your tsconfig.json file

"paths": {
  "moment": [
    "../node_modules/moment/min/moment.min.js"
  ]
}

This article describe good solution: https://medium.jonasbandi.net/angular-cli-and-moment-js-a-recipe-for-disaster-and-how-to-fix-it-163a79180173

Briefly:

1. ng add ngx-build-plus

2. Add a file webpack.extra.js in the root of your project:

   const webpack = require('webpack');
   module.exports = {
       plugins: [
           new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
       ]
   }
   

3. Run:

   npm run build --prod --extra-webpack-config webpack.extra.js
   

   enter code here

Warning moment.js has been deprecated officially https://momentjs.com/docs/#/-project-status/ (try use day.js or luxon)

For anyone on angular 12 or latest

This does not work for me

const webpack = require('webpack');

module.exports = {
    plugins: [
        new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
    ]
}

However this does

const webpack = require('webpack');

module.exports = {
  plugins: [
    new webpack.IgnorePlugin({
      resourceRegExp: /^\.\/locale$/,
      contextRegExp: /moment$/
    })
  ]
};