Package Exports

jspm
jspm/api
jspm/lib/bundle
jspm/lib/config
jspm/lib/core
jspm/lib/ui

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (jspm) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

jspm CLI

Browser package management with modular dependency and version management. https://jspm.io

Installs version-managed modular packages along with their dependencies from any jspm endpoint, currently supporting GitHub, npm and the jspm Registry.
Carefully resolves version ranges within semver compatibility clearly verifying any version forks.
Creates the SystemJS version configuration file for the package.

Build into a bundle or inject a flat dependency tree for flat multiplexing in production.

Example

  jspm install npm:voxel-demo

No package.json found, would you like to create one? [yes]: 
Enter packages folder [jspm_packages]: 
Enter config file path [config.js]: 
Configuration file config.js not found, create it? [y]: 

     Checking versions for npm:voxel-demo
     Downloading npm:voxel-demo@0.0.1
     Checking versions for npm:gl-now
     Checking versions for npm:gl-tile-map
     Checking versions for npm:gl-vao
     Checking versions for npm:gl-buffer
     Checking versions for npm:gl-matrix
     Checking versions for npm:ndarray
     Checking versions for npm:ndarray-fill
     Checking versions for npm:ndarray-ops
     Checking versions for npm:ao-mesher
     Checking versions for npm:ao-shader
     Checking versions for npm:gl-shader
     Checking versions for github:jspm/nodelibs
     Downloading npm:gl-now@0.0.4
     Downloading npm:gl-tile-map@0.3.0
     Downloading npm:gl-buffer@0.1.2
     Downloading npm:gl-matrix@2.0.0
     Downloading npm:gl-vao@0.0.3
     Downloading github:jspm/nodelibs@0.0.2
     Downloading npm:ndarray-fill@0.1.0
     Downloading npm:ao-shader@0.2.3
     Downloading npm:ndarray-ops@1.1.1
     ...

The above populates a jspm_packages folder in the current directory, and generates a config.js file containing the SystemJS loader configuration.

We can load this demo with:

<!doctype html>
  <script src="jspm_packages/system@0.6.js"></script>
  <script src="config.js"></script>
  <script>
    System.import('npm:voxel-demo')
    .catch(function(e) {
      setTimeout(function() {
        throw e;
      });
    });
  </script>

Getting Started

Install jspm CLI:

  npm install jspm -g

Create a project:

cd my-project
jspm init
  
No package.json found, would you like to create one? [yes]: 
Would you like jspm to prefix its package.json properties under jspm? [yes]:
Enter packages folder [jspm_packages]: 
Enter config file path [config.js]: 
Configuration file config.js not found, create it? [y]: 
ok   Verified package.json at package.json
     Verified config file at config.js

Sets up the package.json and configuration file.

Download the SystemJS loader files

  jspm dl-loader
  
   Downloading loader files to jspm_packages
   Looking up github:ModuleLoader/es6-module-loader
   Looking up github:systemjs/systemjs
   Looking up github:jmcriffey/bower-traceur
     es6-module-loader@0.8.js
     system@0.8.js
     traceur-runtime@0.0.58.js
     traceur@0.0.58.js
ok   Loader files downloaded successfully

Install any packages from the jspm Registry, GitHub or npm:

  jspm install npm:lodash-node
  jspm install github:components/jquery
  jspm install jquery

Any npm or Github package can be installed in this way.

Most npm packages will install without any configuration necessary. Github packages may need to be configured for jspm first. Read the guide here on configuring packages for jspm.

All installs are saved into the package.json, so that the jspm_packages folder and configuration file can be entirely recreated with a single jspm install call with no arguments. This is ideal for version-controlled projects where third party packages aren't saved in the repo itself.

The config.js file is updated with the version information and the version is locked down.

In an HTML page include the downloaded SystemJS loader along with the automatically generated configuration file (config.js), then load the modules:

<script src="jspm_packages/system@0.4.js"></script>
<script src="config.js"></script>
<script>
  System.import('npm:lodash-node/modern/objects/isEqual').then(function(isEqual) {
  });
  
  System.import('github:components/jquery').then(function($) {
  });

  System.import('jquery').then(function($) {
  });
</script>

Most npm modules should install without any additional configuration.
Most Github modules that are not already in the registry, will need some package configuration in order to work correctly with jspm install github:my/module.

Read the guide on configuring packages for jspm here.

If you are having any trouble configuring a package for jspm, please just post an issue and we'll help get it configured.

Installing

Installing from the jspm Registry

  jspm install jquery

Automatically downloads and sets the configuration map for the loader.

This is equivalent to writing:

  jspm install jquery=github:components/jquery

The jspm registry just provides a mapping from a name into an endpoint package name.

Switching to CDN package sources

The npm and Github endpoints are both served by CDN, which is automatically configured in jspm.

We can switch the CDN version with a single command:

  jspm setmode remote

This updates the configuration to now load all the packages from the CDN directly instead of the jspm_packages folder. The app will still behave identically, but we retain the version-lock configuration.

Revert back to the local files with:

  jspm setmode local

jspm inject

If using the CDN version, use jspm inject instead of jspm install. This will inject the configuration into config.js without downloading the repo to jspm_packages, making it a quicker install.

  jspm inject jquery

     Looking up jquery in registry
     Checking versions for npm:jquery
ok   github:jspm/nodelibs@0.0.2 (0.0.2)
ok   Injected jquery as npm:jquery@^2.1.1 (2.1.1)
ok   Loader set to CDN library sources

ok   Install complete

Inject locks down exact versions allowing for a stable development environment.

Update Installed Packages

  jspm update

All packages will be checked, and versions upgraded where necessary.

Command Options

Use -f or --force with the install command to overwrite and redownload all dependencies.

Use -o or --override to force-set the package override for a package that needs extra configuration. See https://github.com/jspm/registry#testing-package-overrides.

Development Workflows

Linking

Local linking allows linking local folders to be installed instead of using the remote versions of packages.

Linked packages still need to be linked into a full endpoint, package and version.

  cd my-local-package
  jspm link npm:pkg@1.2.3
ok   Package linked.

  cd ../my-jspm-app
  jspm install --link npm:pkg@1.2.3

my-jspm-app gets a symlink to a globally linked version of my-local-package. But changes to my-local-package do require running jspm link npm:pkg@1.2.3 again to update the link cache, as jspm runs build operations on the package when adding npm compatibility.

Creating Custom Endpoints

You may wish to create your own custom endpoints, such as a private npm repo.

This can be done with:

  jspm endpoint create myendpoint jspm-npm
  npm registry to use [https://registry.npmjs.org]: 
  Would you like to configure authentication? [no]: y
  Enter your npm username: mynpmusername
  Enter your npm password:

We now have an npm endpoint based on a custom registry and authentication which can be used as expected:

  jspm install myendpoint:package

You can also configure these same options for the existing npm endpoint if using a local npm mirror:

  jspm endpoint config npm

Production Workflows

There are two main workflows for production:

Compile into a bundle.
Cache the dependency tree for flat multiplexing via SPDY / HTTP2.

1. Creating a Bundle

  jspm bundle app/main build.js

Creates a file build.js containing app/main and all its dependencies.

We can then load this with a script tag in the page:

<!doctype html>
  <script src="jspm_packages/system@0.6.js"></script>
  <script src="build.js"></script>
  <script>
    System.import('app/main')
    .catch(function(e) {
      setTimeout(function() {
        throw e;
      });
    });
  </script>

Note that bundles also support compiling ES6 code. To try out a demonstration of this, clone the ES6 demo repo here.

Creating a bundle with arithmetic

  jspm bundle app/main - react + moment build.js

Creates a file build.js containing app/main and moment and all their dependencies, excluding react and all its dependencies.

Bundle commonality is currently in development here - https://github.com/jspm/jspm-cli/issues/133.

Loading a bundle automatically (inject)

If you don't want to include the bundle with a script tag, but rather load it only when it is needed, we can do:

  jspm bundle app/main - app/core main-bundle.js --inject

The above will create the bundle, then inject configuration to tell the SystemJS loader what modules should be loaded from the main-bundle.js file.

As soon as one of these modules is requested, the bundle is loaded dynamically.

3. Creating a Dependency Cache

The jspm CDN uses SPDY, optimal cache headers, and minified files, making this workflow suitable for production use.

The remaining performance issue is the round trip latency required to load deep dependencies, as we only find out the dependencies of a module once we have fetched that module, before fetching its dependencies in turn.

We can get around this by injecting the full dependency tree upfront into a dependency cache, so that all dependencies can be fetched in parallel.

  jspm depcache app/main

The above will trace the full tree for app/main and inject it into the config.js depCache.

Now any imports will load the full tree in parallel, reducing the latency delay to one round trip.

4. Creating a self-executing bundle

To create an output distributable script file that can be used entirely on its own independent of SystemJS and jspm, we can use bundle-sfx.

  jspm bundle-sfx app/main app.js

app.js contains a micro-loader implementation (1.4KB gzipped), converts all module formats into ES5 (including compiling ES6), and maintaining bindings and circular references as with normal bundles.

License

Apache 2.0

jspm