twig Basic template syntax Whitespace handling
Example
To remove whitespace (spaces, tabs, newlines…) between HTML tags use spaceless tag:
{% spaceless %}
<div>
<span>foo bar </span>
</div>
{% endspaceless %}
{# produces output <div><strong>foo bar </strong></div> #}
If you need to remove whitespace on a per tag level, use whitespace control modifier i.e. hyphen (-). Using it, you can trim leading and or trailing whitespace:
{% set value = 'foo bar' %}
<span> {{- value }} </span>
{# produces '<span>foo bar </span>' #}
<span> {{ value -}} </span>
{# produces '<span> foo bar</span>' #}
<span> {{- value -}} </span>
{# produces '<span>foo bar</span>' #}
<span {%- if true %} class="foo"{% endif %}>
{# produces '<span class="foo">' #}
<span {%- if false %} class="foo"{% endif %}>
{# produces '<span>' #}
