Charles Tanton, specialist in professional Drupal development (based in Cape Town, South Africa)

Instead of using the ternary operator to set a value or a default if that value doesn't exist, Twig's "default" filter provides a more compact and readable way of doing so. For example:

{% set alignment = alignment ? 'pagination--' ~ alignment : 'pagination--center' %}

Becomes:

{% set alignment = 'pagination--' ~ alignment|default('center') %}

This method is from a custom entity class. The revision_id needs to match your entity's revision entity key.

On a Drupal 8, Bootstrap based site that I’m currently working on we have a couple of forms that have a boolean ‘Acknowledgement’ field that is displayed at the bottom.

Because we’ve enabled “Smart form descriptions (via Tooltips)” in the theme settings, the form field descriptions are not visible, but in this case we wanted to display it below the field, instead of as a tooltip.

This snippet adds the entity type id to the html body tag classes when on the canonical entity page.

I've been working on a Drupal 8 Bootstrap 3 site and was wanting to use the spacing utilities that come with Bootstrap 4.

These utilities provide a range of shorthand responsive padding and margin classes: