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use Jinja's tojson filter

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David Lord 2021-02-01 22:41:49 -08:00
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docs/templating.rst
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@ -95,37 +95,6 @@ by default:
{% from '_helpers.html' import my_macro with context %}
Standard Filters
----------------
Flask provides the following Jinja2 filters in addition to the filters provided
by Jinja2 itself:
.. function:: tojson
:noindex:
This function converts the given object into JSON representation. This
is for example very helpful if you try to generate JavaScript on the
fly.
.. sourcecode:: html+jinja
<script type=text/javascript>
doSomethingWith({{ user.username|tojson }});
</script>
It is also safe to use the output of `|tojson` in a *single-quoted* HTML
attribute:
.. sourcecode:: html+jinja
<button onclick='doSomethingWith({{ user.username|tojson }})'>
Click me
</button>
Note that in versions of Flask prior to 0.10, if using the output of
``|tojson`` inside ``script``, make sure to disable escaping with ``|safe``.
In Flask 0.10 and above, this happens automatically.
Controlling Autoescaping
------------------------