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``inline_css``
==============
The ``inline_css`` filter inlines CSS styles in HTML documents:
.. code-block:: html+twig
{% apply inline_css %}
<html>
<head>
<style>
p { color: red; }
</style>
</head>
<body>
<p>Hello CSS!</p>
</body>
</html>
{% endapply %}
You can also add some stylesheets by passing them as arguments to the filter:
.. code-block:: html+twig
{% apply inline_css(source("some_styles.css"), source("another.css")) %}
<html>
<body>
<p>Hello CSS!</p>
</body>
</html>
{% endapply %}
Styles loaded via the filter override the styles defined in the ``<style>`` tag
of the HTML document.
You can also use the filter on an included file:
.. code-block:: twig
{{ include('some_template.html.twig')|inline_css }}
{{ include('some_template.html.twig')|inline_css(source("some_styles.css")) }}
Note that the CSS inliner works on an entire HTML document, not a fragment.
.. note::
The ``inline_css`` filter is part of the ``CssInlinerExtension`` which is not
installed by default. Install it first:
.. code-block:: bash
$ composer require twig/cssinliner-extra
Then, on Symfony projects, install the ``twig/extra-bundle``:
.. code-block:: bash
$ composer require twig/extra-bundle
Otherwise, add the extension explicitly on the Twig environment::
use Twig\Extra\CssInliner\CssInlinerExtension;
$twig = new \Twig\Environment(...);
$twig->addExtension(new CssInlinerExtension());
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