In drupal 8 you can experience your datefields showing up in English instead of in the language of your website. This fixes it.

By default you get to see a strange screen saying how long your are a member. It is good practice to auto-redirect users on login to the /admin/content page. This snippet does the trick.

A composer update of your drupal can override changes to your htaccess file. With this snippet you can patch it correctly.

It is seen as a bad practice to add complete libraries to your theme in drupal 8. You should add these as packages to your composer file.

The page callback system in drupal 8 is considerably different from drupal 7. This snippet shows you how to show a title depending on your language.

The typical 'from' 'to' datefields are not quite good for usability. With the following snippet you can change the labels.

This snippet shows how to get data stored in config.

Snippet to create a link with a class programmatically.

When editing notes, an often mentioned problem of webmasters is the lack of preview of their text. With this snipped you can embed the css of your theme in CKEditor, which makes it much more visible towards your webmasters.

This code will make you manage subscriptions in mailchimp via a drupal 8 webform.