You can execute systemctl --user --failed to check for failed systemd user units. But let's face it: It's...
If you've stumbled over display: grid while reading the Flexbox material of the previous card - we've got you...
Erfülle die Aufgaben Zeige deinem Mentor in einer Live-Demo was du umgesetzt hast. Wenn du Aufgabe 4 betrachtest...
Jasmine specs for the frontend often need some DOM elements to work with. Because creating them is such a common...
tl;dr The Chrome DevTools are a neat collection of tools for the daily work as a web developer. If...
Wir arbeiten in einem Umfeld in dem sich fast alles um das Web und HTTP dreht. Wir betreiben Webseiten und...
Hat man wechselnde Lastzustände für seine Applikation und möchte Geld einsparen, kann man seine Applikation und die Infrastruktur so designen...
tl;dr In Chrome DevTools in the Elements tab or in Firefox in the Inspector tab you can right click...
You have uncommited changes (you can always check by using git status), which you want to discard.
The robots.txt file and HTML tag can be used to control the behavior of search engine crawlers. Both have different...
Recently we detected a memory leak in one of our applications. Hunting it down, we found that the memory leak...
While working on a Rails application, your code base will grow a collection of different file types including: Ruby (business...
Building application assets with esbuild is the new way to do it, and it's great, especially in combination with...
When Capybara locates elements in the DOM, by default it allows only accessing visible elements -- when you are using a...
Jasmine is a great tool to unit test your JavaScript components without writing an expensive end-to-end test for...
Resources RubyGuides: Mastering Ruby Regular Expressions Using regular expressions in JavaScript Testing regular expressions visually Regular Expressions: Quantifier modes...
JavaScript code can access and manipulate the browser's DOM tree. Using JavaScript we can add interactive behavior to our...
An element with display: grid can define its grid-template-columns based on (preferred) child width using the repeat function...
TL;DR When using Cache-Control on a Rails application, make sure the Vary: Accept header is set.
Rack::SteadyETag is a Rack middleware that generates the same default ETag for responses that only differ in CSRF tokens...
A flaky test is a test that is often green, but sometimes red. It may only fail on some PCs...
Besides their default styling properties, HTML elements have a semantic meaning. For example, an h1 tag is usually styled with...
The RSpec matcher tests if two HTML fragments are equivalent. Equivalency means: Whitespace is ignored Types of attribute quotes are...
It is generally discouraged to load your JavaScript by a tag in the : The reason is that a tag will pause the DOM parser until the script has loaded and executed. This will delay the browser's first contentful paint. A much better default is to load your scripts with a tag: A deferred script has many...