As a web developer, you know Google Analytics (GA). Probably you've dropped the GA snippet into more than one...
The 90s are calling: they want their tables back. Unfortunately, you need them all for laying out your HTML emails...
Here is how to model basic logic in media queries. AND With keyword and. # Target viewport widths between 500 and...
Since late 2015, all major browsers (still excluding Firefox) support pointing device media queries. These can be used to distinguish...
RSpec let's you chain a matcher with .or. The expectation will then pass if at least one matcher matches...
Browsers' printing methods usually don't print background colors. In most cases this is the desired behavior, because you don...
There is a kinda secret, yet well supported CSS feature called currentColor. It's like a special CSS variable that...
For outputting a given String in HTML, you mostly want to replace line breaks with or tags.
CSS Flexbox has become extremely popular amongst front-end developers the last couple of years. This isn’t surprising, as...
When you need test images, instead of using services like lorempixel or placehold.it you may generate test images yourself.
wrap the text with a span use line-height for the spacing between lines ("margin")
When you print (or print preview) and elements are cut off (e.g. after 1st page, or "randomly") you should check...
By default, browsers will not wrap text at syllable boundaries. Text is wrapped at word boundaries only. This card explains...
An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium...
Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...
If you are using PDFKit / wkhtmltopdf, you might as well want to use custom fonts in your stylesheets. Usually this...
The linked article shows how to exploit websites that include unsanitized user input in their CSS. Although the article often...
Hack to implement an inverted "night mode" theme with a few lines of CSS. Colors in images are preserved.
Here is some JavaScript code that allows you to click the screen and get the clicked element's text contents...
Sometimes you add Paperclip image styles, sometimes you remove some. In order to only keep the files you actually need...
I needed to make sure that an element is visible and not overshadowed by an element that has a higher...
This is useful if, for example, you want to use a background-image that has to scale with the width...
Solved with flexbox is a collection of css problems which were hard or impossible to solve without flexbox: Better, Simpler...
Some pseudo-elements need to be addressed with vendor prefixes. E.g. ::selection is not supported by Firefox, you need to...