Sometimes you want to load code on demand. For instance, when a a large library is only used on a...

Webpack builds can take a long time, so we only want to compile when needed. This card shows what will...

Use rules to include or exclude jobs in pipelines. Rules are evaluated in order until the first match. When a...

This card is a general reminder to avoid the short version of a command option in shared code. It's...

Installing gems on a server that has no access to the internet (especially rubygems.org) requires to bundle the gems into...

Generate a password htpasswd -Bn firstname.lastname This will ask you for a password and use bcrypt (-B, more secure) and...

If a project ist configured to spawn CI runners for tests or deployment when pushing to the Repo, a habit...

When you need the DOM node of a tag (e.g. to read extra attributes, or to modify the DOM near it), you can usually reference it via document.currentScript. However, document.currentScript is unsupported in ancient browsers, like Internet Explorer 11 or wkhtmltopdf's Webkit engine. If you are not running async scripts, you can easily polyfill it: document.scripts[document.scripts.length - 1] It works because document.scripts grows with each tag that was evaluated. That is also the reason why this solution will not work reliably for async code. Demo: https://codepen.io/foobear/pen/poRLxQm

In newer passenger versions the output of passenger -v has changed. capistrano-passenger tries to parse the version and now...

To attach files to your records, you will need a new database column representing the filename of the file...

The attached article examines what the percent unit (%) is relative to in CSS The article does a great job of...

I use the TypeScript compiler for this, since its output is more minimal than Babel's. The following will transpile...

Ruby 3.0 introduced a breaking change in how it treats keyword arguments. There is an excellent blog post on the...

I really love to use the shortcuts CTRL+Alt+ Arrow Left and CTRL+Alt+ Arrow Right to navigate through the...

When you have a hex color code, you can easily convert it into its RGB values using plain Ruby.

https://tableconvert.com/ is an online tool to convert tables between different formats (e.g. json, markdown, csv).

We prefer to run our end-to-end tests with headless Chrome. While it's a very stable solution overall...

When your Rails application server raises error, Capybara will fail your test when it clears the session after the last...

When your application is open for public sign up and sends out transactional e-mails to a large number of...

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

In Ruby (almost) everything is an Object. While this enables a lot of powerful features, this concept might be confusing...

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

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

To ensure Spring is not running: bin/spring stop pkill -f spring To prevent Spring from starting again: export DISABLE_SPRING...