RxJS with Single-SPA

Understanding rxjs with single-spa helps you work with single-spa confidently. Here you will learn the core ideas behind rxjs with single-spa, see working code, and pick up best practices used on real teams.

RxJS with Single-SPA Overview

RxJS with Single-SPA is a building block you will reach for often in single-spa. It keeps related logic together and makes your intent obvious to reviewers and future maintainers.

When you learn rxjs with single-spa properly, you avoid the guesswork that leads to bugs and rework. The example below shows the shape you will use in most real single-spa projects.

import { registerApplication, start } from 'single-spa';

registerApplication({
  name: '@org/app',
  app: () => System.import('@org/app'),
  activeWhen: ['/app'],
});

start();

single-spa orchestrates multiple framework apps on one page through a root config.

RxJS with Single-SPA Example

registerApplication({
  name: '@org/app',
  app: () => System.import('@org/app'),
  activeWhen: ['/app'],
});
start();

Start from a minimal RxJS with Single-SPA example and grow it only as needed.
Keep configuration explicit so RxJS with Single-SPA behaves the same in every environment.
Name things clearly so teammates understand your RxJS with Single-SPA at a glance.
Add tests around RxJS with Single-SPA early to lock in expected behaviour.

Single-SPA Cheatsheet

Core single-spa APIs related to rxjs with single-spa.

API	Example	Purpose
registerApplication	`registerApplication({ name, app, activeWhen })`	Register a micro frontend
activeWhen	`activeWhen: ['/checkout']`	Route ownership
start	`start()`	Begin routing
bootstrap	`export async function bootstrap()`	One-time setup
mount	`export async function mount(props)`	Render the app
unmount	`export async function unmount(props)`	Clean up the app
import map	`systemjs-importmap`	Locate app bundles

How RxJS with Single-SPA Works in Single-SPA

RxJS with Single-SPA is part of how single-spa lets multiple applications — even in different frameworks — coexist on one page. A root config registers each app and controls when it is active.

single-spa orchestrates multiple framework apps on one page through a root config.

A root config registers apps and calls start().
Each app exports bootstrap, mount, and unmount lifecycles.
activeWhen decides which routes each app owns.
Import maps resolve each app's bundle at runtime.

Practical Guidance for RxJS with Single-SPA

For reliable micro frontends, rxjs with single-spa should isolate failures and keep shared state minimal. Let each team own its app end to end while agreeing on a few shared contracts.

Concern	Recommendation
Isolation	One app's crash should not break others
Shared state	Prefer shared utility modules over globals
Routing	Keep activeWhen rules explicit and non-overlapping
Deployment	Release via import-map updates per app

Common Mistakes

Skipping error handling and edge cases when wiring up rxjs with single-spa.
Leaving rxjs with single-spa untested, so regressions slip into production.
Over-engineering rxjs with single-spa before you actually need the extra flexibility.
Ignoring documentation, which makes rxjs with single-spa hard for the next developer to change.

Key Takeaways

RxJS with Single-SPA is a core part of working effectively with single-spa.
Start small and keep rxjs with single-spa focused on a single responsibility.
Apply consistent patterns so rxjs with single-spa scales across your project.
Test and document rxjs with single-spa to keep it maintainable over time.

Pro Tip

Pair rxjs with single-spa with automated tests from day one. It is far cheaper to catch single-spa regressions in CI than in production.