About a year ago we decided to redesign our website pracezarohem.cz and pracazarogiem.pl. Redesign was too extensive, so we decided to change the web system too. As mobile dev team we normally using react-native and php for backend. …

Upgrading Expo over more versions can be tricky. Lets see to my jurney, when i migrating from Expo version 41 to 44. Expo upgrade Console command expo upgrade is good start, it will try upgrade all known libs to right version. Then you don’t have to handle which version of react, react-native…

I would like to share my experience with redux-observable in a few points. Logic separation Epics is nice place for your business logic. Doesn’t matter which functionality you need handle. Epics can contains almost everything — Api calls, Navigation handling, or other side-effects. Easy invocation Epics react on redux actions, so everywhere you can…

I’ve been collected some tips, which about i want to share you. I believe, that can helps, when you are about start with appium or searching for improvements in yours test suites. Keep test suites small In my opinion is maintaining tests as small and simple units the right way. Don’t do complex passages…

Paintings apps are very common stuff in AppStore. I would like introduce one of the most easiest implemantation of this kind application. It’s about free-hand painting without layering. To be more interesting i created same functionality in 3-different ways — pure Swift, more powerfull RxSwift and modern SwiftUI. It's my…

Today i want to show you how we are using sentry as bug-tracker for ours mobile apps written in react-native. Sentry redux middleware Because we are using Redux we created Sentry middleware which capture every action into breadcrumbs. const sentryMiddleware: Middleware<State, Action> = ({ getState }) => next => action => {…

Two years ago we started using detox tests for our app. Since then we have covered every screen in application at least by smoke test. We have fighting with reliability, when detox tests fails in some mystery cases. E.g. …

After turn on Hermes engine in our app i was fighting with ugly source maps in sentry events. Every issue looked same… :/ Look at official documentation doesn't help much https://docs.sentry.io/platforms/react-native/manual-setup/hermes/ . I was informed that need upload custom source maps. …