Browsers come with a set of built-in elements like or . When we need a new component not covered by...
Install the latest bundler version: gem install bundler Fetching bundler-2.3.5.gem Successfully installed bundler-2.3.5 1 gem installed Update the bundler...
ActiveSupport (since 4.1) includes test helpers to manipulate time, just like the Timecop gem: To freeze the current time, use...
Capybara provides execute_script and evaluate_script to execute JavaScript code in a Selenium-controlled browser. This however is not...
Within a Flexbox layout, there are multiple CSS attributes that may affect a child's basis (the initial width before...
Rails is split into a large number of (sub-) frameworks. The most important and central of those are activesupport (extends...
When a user shares your content, a snippet with title, image, link and description appears in her timeline. By default...
You can share a state in Ruby with global variables. Even if you should avoid them whenever possible, for debugging...
When an AJAX request raises an exception on the server, Rails will show a minimal error page with only basic...
RubyMine comes with a nice way to grep through your project's files: The finder (ctrl + shift + f). Don't...
Jasmine has long standing support for writing asynchronous specs. In days gone by we used the done callback to achieve...
With ActiveType 1.2 you can modify associations (has_many etc.) after they have been defined. One common use case for...
Not all versions of Node.js are compatible with each other. Also npm packages may require a minimum or maximum version...
jQuery has a function $.fn.trigger(). You can use it to dispatch an event on a jQuery object: let $element = $('.foo...
To keep JavaScript sources small, it can sometimes make sense to split your webpack bundles. For example, if your website...
Download buttons can be difficult to test, especially with Selenium. Depending on browser, user settings and response headers, one of...
We're always striving towards keeping our website's JavaScript as small as possible. If you're using webpack(er...
TL;DR Most web applications do not require action on this. SameSite=None (old browser default) will continue to work...
When delivering non-public uploaded files (images, documents etc), one has to decide whether and how to do authorization. The...
An alternative of using a multiple assignment for a Regex are named groups. Especially when your Regex becomes more complicates...
When doing some meta-programming magic and you want to do something for all attributes of a class, you may...
In Rails, we usually have a mailer setup like this: class MyMailer < ActionMailer::Base def newsletter mail to: 'receiver@host.tld',
From at least Rails 4, the ActionView tag helper turns Array values of HTML options into a single space-separated...
Today's cameras create huge images, some beyond 50MB. Unless you need to offer this large files, you should always...