Summary

• We want to move away from jQuery in future projects
• Motivations are performance, bundle size and general trends for the web platform.
• The native DOM API is much nicer than it used to be, and we can polyfill the missing pieces
• Unpoly 0.60.0 works with or without jQuery

Is jQuery slow?

```text
From: Sven
To: unpoly@googlegroups.com
Subject: performance on smartphones and tablets

Hello

I just used your framework in one project and must say,
I am really pleased with it – but only on a desktop computer.

Have you benchm…

Bundler 2 requires at least Ruby 2.3.0 and RubyGems 2.5.0. You might get the following error when you try to install bundler for Ruby < 2.3:

ERROR:  Error installing bundler:
	bundler requires Ruby version >= 2.3.0.

To fix this error upgrade your project's ruby version or install the last supported version of Bundler for Ruby < 2.3:

gem install bundler -v=1.17.3

You will also see an error if your [RubyGems version is < 2.5.0](https://makandracards.com/makandra/61824-rubygems-can-t-find-bundle-executable-although-b…

When you have an element you want to hide, you can add a ng-show='isOpen' attribute to that element. When you set isOpen to false on the scope, the element will be hidden.

However, when you load the page, the element is usually rendered by the browser before Angular has loaded and had a chance to hide it.

Generic fix (prefer)

The ng-cloak directive was designed for exactly this purpose. Add a ng-cloak attribute or class (and more, see the link) to any element you want to …

Carrierwave includes some handy helper methods you can use to resize your images. Here is a quick summary of them, if you need more details read the docs. You can also use all command line options from RMagick directly if these helpers are not good enough for you.

```
resize_to_limit(width, height)
resize_to_fit(width, height)
resize_to_fi…

For searching in large database tables we usually use PostgreSQL's fulltext search capabilities.

While this works reasonably well for content primarily consisting of prose, it is not necessarily a good solution for all use cases. The main issue is that it is only possible to search for prefixes of text tokens, which can potentially be unexpected for users.

One example are dates:

If you index the text 2019-01-23 15:16, PostgreSQL will create the following tokens: 2019, -01, -23, 15 16. A user searching for 01-23 wi…

Capybara will fail to find <a> tags that are missing an href attribute. This will probably happen to you every now and then on JavaScript-heavy applications.

An example would be an AngularJS application where the following HTML actually works. [1]

<a ng-click="hello()">Hello</a>

Capybara will fail to find that link, even though looking it up via the DOM shows it:

>> find_link("Hello")
Capybara::ElementNotFound: Unable to find link "Hello"

>> find("a").text
=> "Hello"

To make find_link and click_link work…

Spammers have started abusing other application to send their spam. This works like this:

• The application has some form that allows to send e-mails to arbitrary users. This can be something like a newsletter sign-up with a double-opt in, a registration confirmation e-mail (or even password reset e-mail), or something similar.
• The e-mail also includes some reflected text. For example, a user may be able to give their name, and the name is used within the e-mail. The spammer will then abuse that text to include his advertisment.

Potentia…

When restoring a PostgreSQL dump using pg_restore, you usually add the --clean flag to remove any existing data from tables.

Note that this only removes data from tables that are part of the dump and will not remove any extra tables. You need to do that yourself.

In Rails 3+, you can use:

class Project
  delegate :url_helpers, to: 'Rails.application.routes'

  def project_path
    url_helpers.project_path(self)
  end
end

For Rails 2, use the attached Modularity trait. It will give any Ruby class a method #url_writer, on which you can call URL helpers:

class Foo
  does 'write_urls'
  def self.class_method
    url_writer.session_path
  end
  def instance_method
    url_writer.project_path(5)
  end
end

Why string sorting sucks in vanilla Ruby

Ruby's sort method doesn't work as expected with German umlauts:

["Schwertner", "Schöler"].sort
=> ["Schwertner", "Schöler"] # you probably expected ["Schöler", "Schwertner"]

Also numbers in strings will be sorted character by character which you probably don't want:

["1", "2", "11"].sort
# => ["1", "11", "2"] # you probably expected ["1", "2", "11"]

Also the sorting is case sensitive:

["a", "B"].sort
# => ["B", "a"] # yo...