When Capybara locates elements in the DOM, by default it allows only accessing visible elements -- when you are using a...
One really simple way to check whether JavaScript Sentry integration was successful (raven-js or @sentry/browser), is to create an...
Sometimes you need to access a dev server running on localhost from another machine that is not part of the...
Since Rails 6.1, if we use where.not with multiple attributes, it applies logical NAND (NOT(A) OR NOT(B)) instead...
Use option:checked to find the currently selected option: select.querySelector('option:checked') Yes, :checked, not :selected. This is the same...
Jasmine has spyOnProperty(), but it only works if the property is implemented using getter and setter functions. This is a...
TL;DR When using Cache-Control on a Rails application, make sure the Vary: Accept header is set.
Field error steps Spreewald's The...
...field should have an error and The...
...field should have the error...
...steps now...
Elasticsearch defaults to go into readonly mode when you run low on disk space (< 95%). You might then see an...
ImageMagick can convert SVGs to raster image formats. Example for PNG: convert input.svg output.png If the SVG has a...
The Interactive Advertising Bureau (IAB) is a European marketing association which has introduced a standard how advertising can be served...
Some users might use Adblock Plus or similar browser plugins to reduce the number of ads displayed. If you run...
I sometimes had the issue that I received an error when starting an existing vagrant box with vagrant up:
Similar to the Webpack Bundle Analyzer, Chrome's new Lighthouse feature … … shows a visualisation of your JavaScript bundles. It's...
From Exploring ES6: Module imports are hoisted (internally moved to the beginning of the current scope). Therefore, it doesn’t...
Rails 6.1 has a "strict loading" mode that forces the developer to preload any association they plan to use. Associations...
A flaky test is a test that is often green, but sometimes red. It may only fail on some PCs...
This RailsCast demonstrated a very convenient method to activate VCR for a spec by simply tagging it with :vcr.
RSpec is smart when using the include-matcher in combination with .not_to. One could assume that .not_to include...
You want to use fields in your applications. However, your desktop users may encounter some weird quirks: Aside from allowing...
The gem better_errors offers a detailed error page with an interactive REPL for better debugging. I had the issue...
Event delegation is a pattern where a container element has a single event listener that handles events for all descendants...
Sometimes a link or input field has no visible label. E.g. a text field with a magnifying glass icon 🔎 and...
Besides their default styling properties, HTML elements have a semantic meaning. For example, an h1 tag is usually styled with...