Micro Frontends with Module Federation: Beyond the Basics @Architektur Tage 2022

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@ManfredSteyer ManfredSteyer Micro Frontends with Module Federation: Beyond the Basics Manfred Steyer, ANGULARarchitects.io

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@ManfredSteyer Booking App Booking App Check-in App Check-in App Boarding App Boarding App Luggage App Luggage App

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer const Component = await import('other-app/cmp');

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@ManfredSteyer #1 Version Mismatches #2 Mono vs. Multirepo #3 Dynamic Federation #4 Multiple Frameworks/ Versions

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@ManfredSteyer #1 Version Mismatches #2 Mono vs. Multirepo #3 Dynamic Federation #4 Multiple Frameworks/ Versions #0 Module Federation 101

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@ManfredSteyer Manfred Steyer

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@ManfredSteyer

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@ManfredSteyer Shell (Host) Microfrontend (Remote) // Maps Urls in // webpack config remotes: { mfe1: "http://..." } // Expose files in // webpack config exposes: { './Cmp': './my.cmp.ts' } import('mfe1/Cmp')

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@ManfredSteyer How to Get the Microfrontend's URL? Shell (Host) Microfrontend (Remote) RemoteEntry.js

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@ManfredSteyer Shell (Host) Microfrontend (Remote) shared: [ "@angular/core", "…" ] shared: [ "@angular/core", "…" ]

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@ManfredSteyer 1) ng add @angular-architects/module-federation 2) Adjust generated configuration 3) ng serve

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@ManfredSteyer Selecting the highest compatible version 10.0 10.1

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@ManfredSteyer Conflict: No highest compatible version 11.0 10.1

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@ManfredSteyer shared: { "my-lib": { singleton: true } } 11.0 10.1

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@ManfredSteyer shared: { "my-lib": { singleton: true, strictVersion: true // Error instead of warning! } } 11.0 10.1

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@ManfredSteyer shared: { "my-lib": { requiredVersion: ">=1.0.1 <11.1.1" } }

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@ManfredSteyer •Several options baked-in •However, best option: avoid conflicts upfront

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@ManfredSteyer

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@ManfredSteyer Booking Booking Boarding Boarding Shared Shared Feature Feature Feature Feature Feature Feature Feature Feature Feature Feature … … … … … … … … … … … … … … … … … … Booking App Booking App Boarding App Boarding App Publish shared libs seperately via npm Repository n Repository 2 Repository 1 Version Mismatches? Strict Borders

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer https://nrwl.io/nx

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@ManfredSteyer

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@ManfredSteyer Dynamic Module Federation Shell (Host) Microfrontend (Remote) remotes: { mfe1: "http://..." } exposes: { Cmp: './my.cmp.ts' } import('mfe1/Cmp')

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@ManfredSteyer Dynamic Module Federation Shell (Host) Microfrontend (Remote) remotes: { } exposes: { Cmp: './my.cmp.ts' } import('mfe1/Cmp')

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@ManfredSteyer Dynamic Module Federation Shell (Host) Microfrontend (Remote) remotes: { } exposes: { Cmp: './my.cmp.ts' } loadRemoteModule({ type: 'module', remoteEntry: 'http://…', exposedModule: './Cmp' })

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer const Component = await import('other-app/cmp');

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@ManfredSteyer const main = await import('other-app/main'); main.bootstrap();

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@ManfredSteyer const main = await import('other-app/main'); main.bootstrap(); const rootElm = document.createElement('app-root') document.body.appendChild(rootElm);

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@ManfredSteyer await import('other-app/main'); // Self-Bootstrapping const rootElm = document.createElement('app-root') document.body.appendChild(rootElm);

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@ManfredSteyer await import('other-app/main'); const rootElm = document.createElement('app-root') document.body.appendChild(rootElm); WrapperComponent

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer https://red-ocean-0fe4c4610.azurestaticapps.net

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@ManfredSteyer Free eBook ANGULARarchitects.io/book Updated for Module Federation and Alternatives

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@ManfredSteyer Conclusion Baked-in Strategies for Version Mismatches Baked-in Strategies for Version Mismatches Monorepo vs. Multirepo: Self-restriction vs. (Costly) Freedom Monorepo vs. Multirepo: Self-restriction vs. (Costly) Freedom Webpack Runtime API: Dynamic Federation Webpack Runtime API: Dynamic Federation Frankenstein: Bootstrapping Several SPAs Frankenstein: Bootstrapping Several SPAs

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@ManfredSteyer d Slides & Examples Remote Company Workshops and Consulting http://angulararchitects.io