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Sofe is a plugin for systemjs@0.21, but the latest version of systemjs is >3. The new versions of systemjs have the equivalent of sofe built into systemjs itself, via import maps. Because of this, we encourage that you use systemjs@>=3 + import maps, instead of using systemjs@0.21 + sofe. See this file for an example of what the new alternative looks like. For the equivalent of sofe's local storage overrides, check out import-map-overrides.


Service Oriented Front-end - Sofe is a SystemJS plugin that resolves a module name to a fully qualified url at runtime.

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Sofe allows developers to avoid building monolothic front-end web applications and instead build software on top of micro-services. Sofe is a JavaScript library that enables independently deployable JavaScript services to be retrieved at run-time in the browser.

More on the motivation for SOA in the browser

Getting Started

  1. Setup SystemJS and JSPM
  2. Configure SystemJS to use the sofe plugin:
jspm install npm:sofe
  1. Load sofe services:
  .then(hello => hello())
// Sofe is properly setup if the browser alerts a hello world.
// You have successfully loaded the hello-world sofe service.

By default, any npm package with a UMD build can be a sofe service. Simply load the service by the package name:

  .then(Backbone => new Backbone.View({}));

Create your own service

By default, all npm packages are loaded through npm (unpkg). While this is convenient, it isn't always what you want to do for your own services. You can provide a custom location for where your service distributable is located by adding a sofe property to your package.json:

  "name": "my-service",
  "version": "1.0.0",
  "sofe": {
    "url": ""

Republish a new sofe URL to npm whenever you want to update the location of your service distributable.

Services in production

Create your own private service by telling sofe how to resolve your service name. Add to your systemjs configuration a manifest option to a sofe property or auto-discover services by loading a remote manifest of available services:

  sofe: {
    manifest: {
      "someInternalService": ""
    manifestUrl: ''

Learn more about production configuration within the API documentation


Examples are available at or you can run them locally


  1. sofe-inspector - Developer tool for inspecting and overriding available sofe services
  2. sofe-babel-plugin - A babel plugin for production sofe workflows with webpack
  3. sofe-deplanifester - A manifest deployment service for sofe
  4. sofe-hello-world - A simple sofe-service to say hello


Copyright 2016 CanopyTax

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.