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To-Do list example that follows Clean Architecture. Big ideas in a small project. (by greetclock)
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SurveyJS
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I also implemented an uncomplicated To-Do List application to support the verbal explanation. The application uses the same design principles I apply on a much larger scale. I will use this application to give examples of individual components. You are also welcome to check out the source code on Github to examine the complete picture yourself.
The data layer consists of the data service and the repository. Data service orchestrates operations and logic while the repository is responsible for in-memory caching. I use @ngneat/elf for the repository implementation. Although it can be any other library or even fully custom code.