Micro Frontends - a strive for fully verticalized systems

@duffleit micro frontends a strive for fully verticalized systems _

@duffleit David Leitner § Technical Expert at Senacor Technologies §
Lecturer for post diploma courses at UAS Technikum Wien § I do a couple of things around the tech- community § I‘m writing code

@duffleit A definition of micro frontends The idea of micro
frontends is to extend the concepts of micro services to the frontend world.

@duffleit Sam Newman: § small and focused on one thing
§ … to be autonomous § That‘s it WHY do we need this? Independent deployments Autonomous operations Technology agnostic Based on standards Parallel Development Small interface surface Microservices

@duffleit „Microservices are stated as a contrast system to monoliths.“
The WHERE

@duffleit the application the database Big Ball of Mud Brian
Foote Joseph Yoder

@duffleit database layer the database business layer frontend layer

@duffleit payment the database products user shipping

@duffleit DB DB DB DB DB DB DB DB DB

@duffleit DB DB DB DB DB DB DB DB DB
Independent deployments Autonomous operations Technology agnostic Based on standards Parallel Development Small interface surface

@duffleit

@duffleit But wait, … our microservices have actual human users?

@duffleit

@duffleit the frontend

@duffleit The frontend is … not an implementation detail, it
is a critical part of a microservice architecture.

@duffleit frontend platform backend platform Independent deployments Autonomous operations Technology
agnostic Based on standards Parallel Development Small interface surface a frontend monolith was born a micro frontend TO THE RESCUE ! Independent deployments ! Autonomous operations ! Technology agnostic ! Based on standards ! Parallel Development ! Small interface surface

@duffleit A micro frontend? …which one do you want to
have?

@duffleit ! Hyperlink Integration

@duffleit Flavour #1: Hyperlink Integration frontend platform backend platform Catalogue
Ordering Payment Shipping hyperlink hyperlink hyperlink

@duffleit Flavour #1: Breaking service boundaries frontend platform backend platform
Products Ordering Payment Shipping Dash board

@duffleit Flavour #1: Backend for Frontend frontend platform backend platform
Products Ordering Payment Shipping Dash board BFF BFF BFF BFF BFF samnewman.io/patterns/architectural/bff/

@duffleit Flavour #1: Hyperlink Integration Independent deployments Autonomous operations Technology
agnostic Parallel Development

@duffleit What customers expect: 1 Company === 1 Website I
don‘t want to maintain this UI/UX anymore.

@duffleit Flavour #1: Reusage Problem frontend platform backend platform Catalogue
Ordering Payment Shipping hyperlink hyperlink hyperlink Menu Menu Menu

@duffleit Flavour #1: Hyperlink Integration Independent deployments Autonomous operations Technology
agnostic Parallel Development A consistent UI/UX Smooth user interaction Fast loading

@duffleit ! Build Time Integration

@duffleit Flavour #2: Build Time Integration

@duffleit Flavour #2: Build Time Integration BUNDLED FRONTED UI-Shared-Stuff (e.g.
SPA-Framework, Components, Routing)

@duffleit Flavour #2: Build Time Integration Independent deployments Autonomous operations
Technology agnostic Parallel Development A consistent UI/UX Smooth user interaction Fast loading BUNDLED FRONTED UI-Shared-Stuff (e.g. SPA-Framework, Components)

@duffleit ! Transclusion

@duffleit Flavour #3 : Transclusion BUNDLED FRONTED UI-Shared-Stuff (e.g. SPA-Framework,
Components) The bundling is done by the webserver.

@duffleit Flavour #3: Server Side Includes or Edge Side Includes
<html> <body>     </body> </html>

@duffleit Flavour #3 : Transclusion Independent deployments Autonomous operations Technology
agnostic Parallel Development A consistent UI/UX* Smooth user interaction Fast loading BUNDLED FRONTED UI-Shared-Stuff (e.g. SPA-Framework, Components)

@duffleit ! App Shell Integration

@duffleit Flavour #4: App Shell Integration APP SHELL Header Footer
The aggregation is done on the client.

@duffleit Flavour #4: App Shell Integration Independent deployments Autonomous operations
Technology agnostic Parallel Development ! A consistent UI/UX Smooth user interaction Fast loading APP SHELL Header Footer

@duffleit ! Metaframework

@duffleit /catalogue /checkout APP SHELL Header Footer A question of
modularisation Hyperlink Integration App Shell Integration Metaframework

@duffleit Flavour #5: Metaframework Route-based modularisation is handled by a
Metaframework Metaframework /catalogue /checkout

@duffleit • they are implemented with iframes. • or start
using web components now. Flavour #5: Technology agnostic

@duffleit Flavour #5: Metaframework Metaframework /catalogue /checkout Independent deployments Autonomous
operations Technology agnostic Parallel Development ! A consistent UI/UX* Smooth user interaction Fast loading

@duffleit „a consistent UI“ ! CDN – for static files
" CMS – for static content # A Component Library $ for one framework $ technology agnostic

@duffleit Hyperlink Integration Build Time Integration Transclusion App Shell Integration
Metaframework the agony of choice

@duffleit A consultant‘s favourite words. It depends

@duffleit A general decision advice Your application is big?* The
need for smooth user interaction Build Time Integration Hyperlink Integration Strongly Independent UI/Domain Parts Complex modularisation needed Transclusion App Shell Integration Meta- Framework * an application is big enough to justify using micro frontends, if slight UI/UX differences between the two most unrelated subpages are acceptable. Yes No

@duffleit Compose your perfect MIX Landing Shop Ordering hyperlink hyperlink
APP SHELL Header Footer <!–- SSIs -->

@duffleit Key-Takeaways KISS: „think twice if a frontend monolith does
not fit your needs and start with a monolith first approach.“

@duffleit Key-Takeaways „Consider the frontend as part of your microservice
architecture – and solve UI specific problems with UI specific solutions.“

@duffleit Key-Takeaways „micro frontends are not a stack or technology
– everyone who tells you this, wants to sell you something.“

@duffleit Use the right tool for the right job. @duffleit

Micro Frontends - a strive for fully verticaliz...

Micro Frontends - a strive for fully verticalized systems

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