No author: {{ quote|without('author') }}.

Complete quote after without: {{ quote }}.

Only author: {{ quote.author }}.

No author or date: {{ quote|without('date', 'author') }}.

Only date: {{ quote.date }}.

Complete quote again for good measure: {{ quote }}.

Marked-up:

{{ quote.content }}

– {{ quote.author }} ({{ quote.date }})

All attributes:

Class attributes in front, remainder at the back:

Class attributes in back, remainder at the front:

Class attributes only:

Without boolean attribute.

Without string attribute.

Without id and class attributes.

{% set without_args = ['id', 'class'] %}

Without id and class attributes via an array.

Without any attributes via mixed array and string.

Without any attributes via mixed string then array.

Without any attributes with duplicate "id" key.

All attributes again.

ID and class. Having the same ID twice is not valid markup but we want to make sure the filter doesn't use \Drupal\Component\Utility\Html::getUniqueId().

Rendered author string length: {{ quote.author|render|length }}.