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===============================================================================
django-js-asset -- script tag with additional attributes for
django.forms.Media
===============================================================================
Usage
=====
Use this to insert a script tag via ``forms.Media`` containing additional
attributes (such as id and ``data-*`` for CSP-compatible data
injection.):
.. code-block:: python
from js_asset import JS
forms.Media(js=[
JS("asset.js", {
"id": "asset-script",
"data-answer": "42",
}),
])
The rendered media tag (via ``{{ media.js }} or {{ media }}`` will
now contain a script tag as follows, without line breaks:
.. code-block:: html
The attributes are automatically escaped. The data attributes may now be
accessed inside ``asset.js``:
.. code-block:: javascript
var answer = document.querySelector("#asset-script").dataset.answer;
Also, because the implementation of static differs between supported
Django versions (older do not take the presence of
``django.contrib.staticfiles in INSTALLED_APPS`` into account), a
``js_asset.static`` function is provided which does the right thing
automatically.
When adding external script assets, you should pass ``static=False to
the JS object to avoid passing the script URL through static()``.
In this case, you probably want to add defer or async, and maybe
also integrity and crossorigin attributes. Please note that
boolean attributes are not properly supported, so specify them as
follows::
JS(
"https://cdn.example.com/script.js",
{"defer": "defer"},
static=False,
)
Compatibility
=============
At the time of writing this app is compatible with Django 1.7 and better
(up to and including the Django master branch), but have a look at the
[Travis CI build] for
definitive answers.
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