I wanted to start a simple hello world app for Angular.
When I followed the instructions in the official quickstart the installation created 32,000 files in my project.
I figured this is some mistake or I missed something, so I decided to use angular-cli, but after setting up the project I counted 41,000 files.
Where did I go wrong? Am I missing something really really obvious?
There is nothing wrong with your configuration.
Angular (since version 2.0) uses npm modules and dependencies for development. That's the sole reason you are seeing such a huge number of files.
A basic setup of Angular contains transpiler, typings dependencies which are essential for development purposes only.
Once you are done with development, all you will need to do is to bundle this application.
After bundling your application, there will be only one bundle.js file which you can then deploy on your server.
'transpiler' is just a compiler, thanks @omninonsense for adding that.
Typical Angular2 Project
NPM Package Files (Development) Real World Files (Deployment)
@angular 3,236 1
rxJS 1,349 1*
core-js 1,341 2
typings 1,488 0
gulp 1,218 0
gulp-typescript 1,243 0
lite-server 5,654 0
systemjs-builder 6,470 0
__________________________________________________________________
Total 21,999 3
*: bundled with @angular
There is nothing wrong with your development configuration.
Something wrong with your production configuration.
When you develop a "Angular 2 Project" or "Any Project Which is based on JS" you can use all files, you can try all files, you can import all files. But if you want to serve this project you need to COMBINE all structured files and get rid of useless files.
There are a lot of options for combine these files together:
As several people already mentioned: All files in your node_modules directory (NPM location for packages) are part of your project dependencies (So-called direct dependencies). As an addition to that, your dependencies can also have their own dependencies and so on, etc. (So-called transitive dependencies). Several ten thousand files are nothing special.
Because you are only allowed to upload 10'000 files (See comments), I would go with a bundler engine. This engine will bundle all your JavaScript, CSS, HTML, etc. and create a single bundle (or more if you specify them). Your index.html will load this bundle and that's it.
I am a fan of webpack, so my webpack solution will create an application bundle and a vendor bundle (For the full working application see here https://github.com/swaechter/project-collection/tree/master/web-angular2-example):
index.html
<!DOCTYPE html>
<html>
<head>
<base href="/">
<title>Webcms</title>
</head>
<body>
<webcms-application>Applikation wird geladen, bitte warten...</webcms-application>
<script type="text/javascript" src="vendor.bundle.js"></script>
<script type="text/javascript" src="main.bundle.js"></script>
</body>
</html>
webpack.config.js
var webpack = require("webpack");
var path = require('path');
var ProvidePlugin = require('webpack/lib/ProvidePlugin');
var CommonsChunkPlugin = require('webpack/lib/optimize/CommonsChunkPlugin');
var UglifyJsPlugin = require('webpack/lib/optimize/UglifyJsPlugin');
/*
* Configuration
*/
module.exports = {
devtool: 'source-map',
debug: true,
entry: {
'main': './app/main.ts'
},
// Bundle configuration
output: {
path: root('dist'),
filename: '[name].bundle.js',
sourceMapFilename: '[name].map',
chunkFilename: '[id].chunk.js'
},
// Include configuration
resolve: {
extensions: ['', '.ts', '.js', '.css', '.html']
},
// Module configuration
module: {
preLoaders: [
// Lint all TypeScript files
{test: /\.ts$/, loader: 'tslint-loader'}
],
loaders: [
// Include all TypeScript files
{test: /\.ts$/, loader: 'ts-loader'},
// Include all HTML files
{test: /\.html$/, loader: 'raw-loader'},
// Include all CSS files
{test: /\.css$/, loader: 'raw-loader'},
]
},
// Plugin configuration
plugins: [
// Bundle all third party libraries
new CommonsChunkPlugin({name: 'vendor', filename: 'vendor.bundle.js', minChunks: Infinity}),
// Uglify all bundles
new UglifyJsPlugin({compress: {warnings: false}}),
],
// Linter configuration
tslint: {
emitErrors: false,
failOnHint: false
}
};
// Helper functions
function root(args) {
args = Array.prototype.slice.call(arguments, 0);
return path.join.apply(path, [__dirname].concat(args));
}
Advantages:
Disadvantages:
Disclaimer: This is a good solution for Http 1.*, because it minimizes the overhead for each Http request. You only have a request for your index.html and each bundle - but not for 100 - 200 files. At the moment, this is the way to go.
Http 2, on the other hand, tries to minimize the Http overhead, so it's based on a stream protocol. This stream is able to communicate in both direction (Client <--> Server) and as a reason of that, a more intelligent resource loading is possible (You only load the required files). The stream eliminates much of the Http overhead (Less Http round trips).
But it's the same as with IPv6: It will take a few years until people will really use Http 2
You need to ensure that you're just deploying the dist (short for distributable) folder from your project generated by the Angular CLI. This allows the tool to take your source code and it's dependencies and only give you what you need in order to run your application.
That being said there is/was an issue with the Angular CLI in regards to production builds via `ng build --prod
Yesterday (August 2, 2016) a release was done which switched the build mechanism from broccoli + systemjs to webpack which successfully handles production builds.
Based upon these steps:
ng new test-project
ng build --prod
I am seeing a dist folder size of 1.1 MB across the 14 files listed here:
./app/index.js
./app/size-check.component.css
./app/size-check.component.html
./favicon.ico
./index.html
./main.js
./system-config.js
./tsconfig.json
./vendor/es6-shim/es6-shim.js
./vendor/reflect-metadata/Reflect.js
./vendor/systemjs/dist/system.src.js
./vendor/zone.js/dist/zone.js
Note Currently to install the webpack version of the angular cli, you must run... npm install angular-cli@webpack -g
Creating a new project with angular cli recently and the node_modules folder was 270 mb, so yes this is normal but I'm sure most new devs to the angular world question this and is valid. For a simple new project it would make sense to pare the dependencies down maybe a bit;) Not knowing what all the packages depend on can be a bit unnerving especially to new devs trying the cli out for the first time. Add to the fact most basic tutorials don't discuss the deployment settings to get the exported files only needed. I don't believe even the tutorial offered on the angular official website talks about how to deploy the simple project.
Angular itself has lots of dependencies, and the beta version of CLI downloads four times more files.
This is how to create a simple project will less files ("only" 10K files) https://yakovfain.com/2016/05/06/starting-an-angular-2-rc-1-project/
Seems like nobody have mentioned Ahead-of-Time Compilation as described here: https://angular.io/docs/ts/latest/cookbook/aot-compiler.html
My experience with Angular so far is that AoT creates the smallest builds with almost no loading time. And most important as the question here is about - you only need to ship a few files to production.
This seems to be because the Angular compiler will not be shipped with the production builds as the templates are compiled "Ahead of Time". It's also very cool to see your HTML template markup transformed to javascript instructions that would be very hard to reverse engineer into the original HTML.
I've made a simple video where I demonstrate download size, number of files etc. for an Angular app in dev vs AoT build - which you can see here:
You'll find the source code for the demo here:
https://github.com/fintechneo/angular2-templates
And - as all the others said here - there's nothing wrong when there are many files in your development environment. That's how it is with all the dependencies that comes with Angular, and many other modern frameworks. But the difference here is that when shipping to production you should be able to pack it into a few files. Also you don't want all of these dependency files in your git repository.
This is actually not Angular specific, it happens with almost any project that uses the NodeJs / npm ecosystem for its tooling.
Those project are inside your node_modules folders, and are the transititve dependencies that your direct dependencies need to run.
In the node ecosystem modules are usually small, meaning that instead of developing things ourselves we tend to import most of what we need under the form of a module. This can include such small things like the famous left-pad function, why write it ourselves if not as an exercise ?
So having a lot of files its actually a good thing, it means everything is very modular and module authors frequently reused other modules. This ease of modularity is probably one of the main reasons why the node ecosystem grew so fast.
In principle this should not cause any issue, but it seems you run into a google app engine file count limit. In that I case I suggest to not upload node_modules to app engine.
instead build the application locally and upload to google app engine only the bundled filesn but don't to the build in app engine itself.
if you use Angular CLI you can always use --minimal flag when you create a project
ng new name --minimal
I've just run it with the flag and it creates 24 600 files and ng build --prod produces 212 KB dist folder
So if you don't need water fountains in your project or just want to quickly test something out this I think is pretty useful
If your file system supports symbolic links, then you can at least relegate all of these files to a hidden folder -- so that a smart tool like tree won't display them by default.
mv node_modules .blergyblerp && ln -s .blergyblerp node_modules
Using a hidden folder for this may also encourage the understanding that these are build-related intermediate files that don't need to be saved to revision control -- or used directly in your deployment.
There is nothing wrong. These are all the node dependencies that you have mentioned in the package.json.
Just be careful if you have download some of the git hub project, it might have lot of other dependencies that are not actually require for angular 2 first hello world app :)
There is nothing wrong with your development configuration.
if you use Angular CLI you can always use --minimal flag when you create a project
ng new name --minimal
