Operation Monolith Breaker

L-mobile I Digitalisierte Softwarelösungen

Imre Szecsődi

Friday, 25.03.2022

Table of content

L-mobile I Digitalisierte Softwarelösungen

  • What?
  • Why?
  • How?

What?

L-mobile I Digitalisierte Softwarelösungen

  • Video calling plugin is a monolith
  • Knockout has a loose idea about component nesting
  • Separation of concern
  • Re-usability
  • Complexity

What?

L-mobile I Digitalisierte Softwarelösungen

  • What is actually good about Knockout?
    • 2-way bindings
    • Observables
    • SSR
  • What is bad about Knockout?

What?

L-mobile I Digitalisierte Softwarelösungen

  • What is actually good about Knockout?
    • 2-way bindings
    • Observables
    • SSR
  • Whats bad about Knockout?

What?

L-mobile I Digitalisierte Softwarelösungen

  • What is actually good about Knockout?
    • 2-way bindings
    • Observables
    • SSR
  • Whats bad about Knockout?

What?

L-mobile I Digitalisierte Softwarelösungen

  • What is actually good about Knockout?
    • 2-way bindings
    • Observables
    • SSR
  • Whats bad about Knockout?

What?

L-mobile I Digitalisierte Softwarelösungen

  • What actually good about Knockout?
    • 2-way bindings
    • Observables
    • SSR
  • Whats bad about Knockout?

What?

L-mobile I Digitalisierte Softwarelösungen

  • What actually good about Knockout?
    • 2-way bindings
    • Observables
    • SSR
  • Whats bad about Knockout?

What?

L-mobile I Digitalisierte Softwarelösungen

  • Want to access DOM elements directly, without binding?

What?

L-mobile I Digitalisierte Softwarelösungen

  • Knockout is lacking flexibly
  • Lets see use cases outside "almost always", where you actually need references:
    • HTMLVideoElement
    • HTMLAudioElement
    • Editable DIV
    • HTMLCanvasElement
  • Knockout lacks binding error debugging
    • Which is coming from, lack of js checking in the templates

Why?

L-mobile I Digitalisierte Softwarelösungen

  • This is fine, it works as intended
  • We loosing time and money by fight the framework
  • We write sub-optimal code, because of it
  • Why do I want to see change?
    • To spare time
    • Effort
    • Brain cells
    • Sanity
  • And the solution is...

React

L-mobile I Digitalisierte Softwarelösungen

Preact

L-mobile I Digitalisierte Softwarelösungen

Why?

L-mobile I Digitalisierte Softwarelösungen

  • Why React?
    • It is the adoptable framework out there, and most used one
  • Why Preact not React?
    • Some parts are more convenient
    • Has Compatibility option for React
    • There is no synthetic event handler, native browser API is used
    • Its 4kb, and a complete package, with react, you need also React DOM
  • What if we got limited by Preact?
    • Unlikely, mayor libraries work out of the box

How?

L-mobile I Digitalisierte Softwarelösungen

  • How much effort is the setup?
const config = { 
   //...snip
  "resolve": { 
    "alias": { 
      "react": "preact/compat",
      "react-dom/test-utils": "preact/test-utils",
      "react-dom": "preact/compat",     // Must be below test-utils
      "react/jsx-runtime": "preact/jsx-runtime"
    },
  }
}
{
  "compilerOptions": {
    "jsx": "react-jsx",
    "jsxImportSource": "preact",
  }
}
npm i preact

How?

L-mobile I Digitalisierte Softwarelösungen

  • How much effort is to learn it?

How?

L-mobile I Digitalisierte Softwarelösungen

  • How much effort is to learn it?~4-20 hours

How?

L-mobile I Digitalisierte Softwarelösungen

Demonstration

How?

L-mobile I Digitalisierte Softwarelösungen

  • Resources
    • https://preactjs.com/
    • https://reactjs.org/
    • https://youtu.be/Dorf8i6lCuk - React Crash Course for Beginners 2021
    • https://youtu.be/Tn6-PIqc4UM  - React in 100 Seconds
    • https://youtu.be/TNhaISOUy6Q - 10 React Hooks Explained
    • https://github.com/enaqx/awesome-react

Any questions?

L-mobile I Digitalisierte Softwarelösungen

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