Advanced Single-SPA Concepts

1. Introduction

Single-SPA is a popular framework for implementing micro frontends. This lesson will cover advanced concepts that allow developers to leverage the full potential of Single-SPA in building scalable and maintainable applications.

2. Core Concepts

2.1. Applications and Layouts

In Single-SPA, applications are self-contained units that can be loaded independently. Layouts are responsible for rendering these applications in a unified manner.

Note: Ensure each application is capable of being loaded and unloaded without affecting others.

2.2. Route Management

Single-SPA allows for dynamic routing, enabling different applications to handle their routing independently or cooperatively.

2.3. Application Lifecycles

Applications have lifecycle methods that manage their loading, mounting, and unmounting. Understanding these lifecycles is crucial for optimal performance.

3. Implementation Steps

Set up a Single-SPA project using create-single-spa.

Create multiple applications within the project.

Configure routes in the single-spa-config.js file.

Implement lifecycle methods for each application.

Test loading and unloading of applications.

3.1. Example of Application Registration


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

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

            start();

4. Best Practices

Keep applications independent and self-contained.
Use shared libraries wisely to minimize bundle size.
Document applications and their configuration.
Optimize loading times with lazy loading.

5. FAQ

What is Single-SPA?

Single-SPA is a JavaScript framework designed to help developers build micro frontend architectures efficiently.

How does Single-SPA handle routing?

Single-SPA can manage routing either at the application level or through a global router that coordinates between applications.

Can Single-SPA be used with different frameworks?

Yes, Single-SPA supports applications built with different frameworks like React, Angular, and Vue.

6. Workflow Flowchart


        graph TD;
            A[Start] --> B{Application Loaded?};
            B -- Yes --> C[Mount Application];
            B -- No --> D[Load Application];
            D --> C;
            C --> E[Handle Routing];
            E --> F[Unmount Application];
            F --> B;