01 · React / TypeScript
JavaScript: your first program
Run a JavaScript file and understand the difference between a browser and Node.js.
← ProjectsData flow
React / TypeScript · Application
Hausakte
Record repairs, costs and documents for a home.
In developmentArchitecture and data flow
- Routes
- feature hooks
- HouseService
- repository, FileVault and device ports
SQLite transactions protect records. File cleanup checks all references first to retain attachments in use.
Code and evidence
Pinned source links show the implementation and existing test files. Startup commands and documented verification boundaries are in the README at the same version. This website audit is not a fresh CI run of every project.
- house-log · entry-service.ts
- house-log · repository.ts
- house-log · +not-found.tsx
- house-log · backup-limits.test.ts
- house-log · backup.test.ts
- README · dfd6fc8c
Licence: Repository · Source checked on 12.10.2026
Learn through tutorials
02 · React / TypeScript
Variables and data types in JavaScript
Use const and let and identify text, numbers, booleans and missing values.
03 · React / TypeScript
Operators, comparisons and if
Choose between workflows based on a condition.
04 · React / TypeScript
Loops in JavaScript
Iterate over values and calculate a total.
05 · React / TypeScript
Functions and scope
Write reusable calculations and understand local variables.
06 · React / TypeScript
Arrays, objects and new values
Describe records and create changes without overwriting the old value.
07 · React / TypeScript
HTML and CSS: the foundation of a web interface
Open a simple web page and separate content from styling.
08 · React / TypeScript
TypeScript types and modules
Describe allowed data shapes and check them before execution.
09 · React / TypeScript
Promises, async/await and errors
Wait for eventual results and handle failed tasks.
10 · React / TypeScript
First React app: JSX, props and state
Render components and change state through a user action.
12 · React / TypeScript
React Native, Expo and navigation
Apply React foundations to mobile views and understand native boundaries.
13 · React / TypeScript
SQLite and repositories in House Log
Understand local SQL persistence, transactions and separate device adapters.
15 · React / TypeScript
Test components and repositories meaningfully
Verify a user action and identify failures only real database tests can find.
16 · React / TypeScript
A small offline house log with React Native
Connect native input, a service and a SQLite repository replaceable between Android and tests.