Fsm, games and ui development
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This document discusses using a finite state machine (FSM) approach to manage the different states of a user interface for editing and saving a name. It notes some issues with using boolean flags alone to track editing, saving, and error states. It then introduces FSM as a better solution, where the UI has a single state at a time and transitions between states are defined by events. It provides examples of FSM libraries like XState that can be used to implement this approach for a web front-end.
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Fsm, games and ui development
- 1. FSM, Games and UI development
- 3. ...Once upon a time a front-end engineer Name
- 5. Name Initial
- 8. Name Saving
- 9. Name Initial
- 12. ...once upon a time a designer “I forgot a detail, we didn’t treat the error state”
- 13. ...once upon a time a designer “when with errors, the input should back to editing state. so the client can try save again”
- 17. ...Our buddy front-end saw that the solution wasn’t good enough
- 18. 1 boolean = True False
- 19. isEditing + isSaving + isError 1 2 3 4 5 6 7 8
- 21. … so he had a better idea
- 27. Keep the state using boolean variables is confuse. requiring extra treatments of all possible states and pray to any other edge case never appears Problem
- 28. Have a single state at a time and define transitions between states using an event. Solution
- 30. A finite state machine is a mathematical model used to represent computer programs or logic circuits. The concept is conceived as an abstract machine that must be in one of a finite number of states. https://pt.wikipedia.org/wiki/M%C3%A1quina_de_estados_finita
- 31. Estado Atual → Eventos ↓ Estado A Estado B Estado C Evento X ... ... ... Evento Y ... Estado C ... Evento Z ... ... ... Table of state transitions
- 32. StateCharts
- 33. stateChartsActions Guards Paralel states Compound states Delayed transitions Activity
- 40. But, how about your web front-end?
- 41. Checkout form / lib https://xstate.js.org/viz/?gist=bf4a9749bd45bf08313d13945c6597a9
- 46. code is for humans
- 47. YOu don’t need any library to use state charts.
- 48. but...
- 52. what else?
- 53. WRITE LESS TESTS WITH MODEL-BASED TESTING
- 55. define assertsadd a machine add a model choose a path
- 58. CREDITS: This presentation template was created by Slidesgo, including icons by Flaticon, and infographics & images by Freepik. Thanks! questions? magdiel.kesller@gmail.com https://github.com/dielduarte https://twitter.com/diel_duarte https://www.linkedin.com/in/dielduarte/ Please keep this slide for attribution.