1``spaceless``
2=============
3
4.. versionadded:: 1.38
5
6    The ``spaceless`` filter was added in Twig 1.38.
7
8Use the ``spaceless`` filter to remove whitespace *between HTML tags*, not
9whitespace within HTML tags or whitespace in plain text:
10
11.. code-block:: jinja
12
13    {{
14        "<div>
15            <strong>foo</strong>
16        </div>
17        "|spaceless }}
18
19    {# output will be <div><strong>foo</strong></div> #}
20
21You can combine ``spaceless`` with the ``filter`` tag to apply the
22transformation on large amounts of HTML:
23
24.. code-block:: jinja
25
26    {% filter spaceless %}
27        <div>
28            <strong>foo</strong>
29        </div>
30    {% endfilter %}
31
32    {# output will be <div><strong>foo</strong></div> #}
33
34This tag is not meant to "optimize" the size of the generated HTML content but
35merely to avoid extra whitespace between HTML tags to avoid browser rendering
36quirks under some circumstances.
37
38.. caution::
39
40    As the filter uses a regular expression behind the scenes, its performance
41    is directly related to the text size you are working on (remember that
42    filters are executed at runtime).
43
44.. tip::
45
46    If you want to optimize the size of the generated HTML content, gzip
47    compress the output instead.
48
49.. tip::
50
51    If you want to create a tag that actually removes all extra whitespace in
52    an HTML string, be warned that this is not as easy as it seems to be
53    (think of ``textarea`` or ``pre`` tags for instance). Using a third-party
54    library like Tidy is probably a better idea.
55
56.. tip::
57
58    For more information on whitespace control, read the
59    :ref:`dedicated section <templates-whitespace-control>` of the documentation and learn how
60    you can also use the whitespace control modifier on your tags.
61