There seems to be a nasty bug in Chrome 56 when testing with Selenium and Capybara: Slashes are not written...
Web technology is a broad field and you cannot be an expert in all aspects. However, it is useful to...
Just like we use gems on the server, we use third party JavaScript libraries in the browser. These typically provide...
Collection of useful tools in the Chrome JavaScript console. Make the whole page editable This is not special to Chrome...
TLDR: A function is hard to use when it sometimes returns a promise and sometimes throws an exception. When writing...
Chrome gives you the currently selected element in the inspector with $0. If you select a button in the DOM...
Plot graphs in Ruby WebGraphviz renders in your browser via JavaScript (to store the rendered graph, extract the SVG using...
TL;DR Debugging problems with javascript errors in cucumber tests is sometimes easier in the browser. Run the test, stop...
There is no CSS selector for matching elements that contains a given string ¹. Luckily, Capybara offers the :text option to...
We used zeroclipboard.js in some of our projects but now we switched to clipboard.js because it does not rely on...
This might be relevant for us since we're often managing customer documents in our apps. I played around with...
We often use VCR to stub external APIs. Unfortunately VCR can have problems matching requests to recorded cassettes, and these...
Same requests are recorded only once in vcr. Replaying a test fails, if you trigger the same request multiple times...
There is no build in functionally in jQuery and Prototype to extract params from a url. You can use this...
ClockPicker is a JavaScript and Bootstrap implementation of an Android-style time picker which looks and feels great. Unfortunately, it...
Promises are the new way™ to express "Do this, and once you're done, do that". In contrast to callbacks...
To simulate Rails' to_sentence in your JavaScript application, you can use these few lines of CoffeeScript code: joinSentence = (array...
We're using Middleman for some static sites like our blog. Despite being very similar to Rails, Middleman does not...
Here is a symbol of an eight note: ♪ Its two-byte hex representation is 0x266A. This card describes how to...
The default Google Analytics might not work as expected with your Unpoly app. This is because your app only has...
All new browsers support the new object-fit CSS property. It allows to specify how an element behaves within its...
The way that Javascript schedules timeouts and promise callbacks is more complicated than you think. This can be the reason...
When you are working with jQuery selectors and collections, many times you want to know if the collection actually contains...
to create a Gallery that has a name and has_many :images, which in turn have a...