Mowa o lokalnych edycjach 4Developers - Największego Interdyscyplinarnego Festiwalu IT dla programistów w Polsce. W tym roku organizatorzy ponownie przenoszą konferencję na lokalny grunt. Spotkania odbędą się w Katowicach, Poznaniu, Wrocławiu oraz Łodzi.
Dalej
Once I created a React component that was updating the app URL in useEffect based on some conditions. The logic was that whenever a user gets to the meetings list and none is selected yet, then by default a first item should be marked as selected. This information should be visible both in the UI (some special styles are applied then) and in the browser address bar (the id of a meeting should be a part of URL).
Nowadays writing automated tests for web apps is usually the only shield against failures we can have. It protects against introducing production bugs in a codebase and make a long-term maintenance easier.
Dalej
In my work I often find myself in situation where designers are using colors that are not defined in the style guidelines, but are somewhat similar. This is a difficult situation for every frontend developer that would like to use only colors predefined in guidelines for consistency.
Dalej
When I started learning Typescript with React I was able to stick with the convention of defining components with a const keyword. After some I switched teams and we decided to use function declarations as a convention for defining React components.
When developing apps using modern syntax following ES6+ standards you can get to the point that your files and directories structure is deeply nested. This makes importing code a little bit complicated.
Dalej
When writing React apps or modern JavaScript in general, we often create files with a set of reusable functions or classes. People tend to use default exports in such cases and I'm going to explain, why it's not the best idea to use them.
Dalej
We all know what React is today. For those who don't know it yet: it's a view rendering library that helps developers to build user interfaces rapidly.
Dalej
