Browsers blocks abusable JavaScript API calls until the user has interacted with the document. Examples would be opening new tab...

The ActionDispatch module of Rails gives you the helper method flash to access the flash messages in a response.

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github.com

capybara-lockstep can help you with flaky end-to-end tests: This Ruby gem synchronizes Capybara commands with client-side...

ZSH is an alternative command line shell that includes some features like spelling correction, cd automation, better theme, and plugin...

By default parallel_tests will spawn as many test processes as you have CPUs. If you have issues with flaky...

CarrierWave comes with a set of default configuration options which make sense in most cases. However, you should review these...

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mixedcontentexamples.com

The pages […] allow you to see different types of mixed content and test how they behave in your browser. The...

bundle outdated [--filter-major|--filter-minor|--filter-patch] Example output for bundle outdated --filter-major Other examples

getbootstrap.com

Recently I made an upgrade from Bootstrap 3 to Bootstrap 4 in a bigger project. Here are some tips how...

The Truemail gem (not to be confused with truemail.io) allows validating email addresses, e.g. when users enter them into a...

In long diffs, it can become impossible to spot small changes in larger blocks of moved code. This may be...

When testing with Cucumber / Caypbara, iframes are ignored, so you can't interact with them. To interact with your iframe...

Headless Chrome is a way to run the Chrome browser without a visible window. Configuring Capybara Configure the Capybara driver...

SSHKit 1.9.0 might fail with the following error, when trying to deploy a Rail application. Upgrading the gem to version...

When deploying a Rails application that is using Webpacker and Capistrano, there are a few configuration tweaks that optimize the...

In Rubocop you might notice the cop Style/CaseEquality for e.g. this example: def foo(expected, actual) expected === actual end

github.com

Scroll and touch event listeners tend to be computationally expensive as they are triggered very often. Every time the event...

We currently test most of our gems on Travis CI, but want to migrate those tests to Github Actions. This...

makandra dev

While debugging a SPF record I found spf-record.de to be very helpful. it lists all IPs that are covered by...

makandra dev

If you're using the webdrivers gem and VCR together, depending on your configuration, VCR will yell at you regulary...

Ruby's File class has a handy method binary? which checks whether a file is a binary file. This method...

If you want to prevent that two processes run some code at the same time you can use the gem...

If you migrate a Rails application from Sprockets to Webpack(er), you can either transpile your CoffeeScript files to JavaScript...

"Open-source software (OSS) is great. Anyone can use virtually any open-source code in their projects." Well, it depends...