Timecop is a great gem to set the current time in tests. However, it is easy to introduce flakyness to...
In a Jasmine spec you want to spy on a function that is imported by the code under test. This...
We usually rely on VCR and WebMock to prevent any real network connection when running our unit tests.
By default subscript ( ) and superscript ( ) tags are styled with vertical-align: sub, respectively vertical-align: super by most browsers.
You have some SVG files you want to use as icons on your website. How would you embed them?
In esbuild, you usually import other files using relative paths: import './some-related-module' import `../../utils/some-utility-module` import `../../../css/some-css.sass` This is totally fine...
Jasmine specs for the frontend often need some DOM elements to work with. Because creating them is such a common...
Jasmine specs that work with DOM elements often leave elements in the DOM after they're done. This will leak...
tl;dr The Chrome DevTools are a neat collection of tools for the daily work as a web developer. If...
You can use ETags to allow clients to use cached responses, if your application would send the same contents as...
One rule of thumb I try to follow in capybara tests is using capybara matchers and not plain rspec matchers...
tl;dr git checkout is the swiss army of git commands. If you prefer a semantically more meaningful command for...
You have uncommited changes (you can always check by using git status), which you want to discard.
tl;dr In RubyMine you can use find and replace with capture groups (.*?) and backreferences $1 (if you have several...
Case studies and experiments demonstrating the impact of web performance optimization (WPO) on user experience and business metrics.
To allow HTTP 304 responses, Rails offers the fresh_when method for controllers. The most common way is to pass...
When you build a JSON API you need to come up with a style to represent attributes, pagination, errors or...
When working with feature branches, stale branches pile up over time. It's best to remove them right after merge...
Recently we detected a memory leak in one of our applications. Hunting it down, we found that the memory leak...
The inset CSS property is a shorthand that corresponds to the top, right, bottom, and/or left properties. It has the...
It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...
When you are working with SVG files and ImageMagick you can get different results on different machines depending on which...
The gemspec for gems allows to add metadata to your gem, some of which have a special meaning and are...
ruby-warning adds custom processing for warnings, including the ability to ignore specific warning messages, ignore warnings in specific files/directories...