#17419: Add a JSON template filter
-------------------------------------+-------------------------------------
Reporter: Lau Bech Lauritzen | Owner: Aymeric
| Augustin
Type: New feature | Status: new
Component: Template system | Version: master
Severity: Normal | Resolution:
Keywords: json template tag | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by blighj):
My Two cents on this.
Escaping json is tricky for all the reasons outlined above, is it in a
<script> is it in an attribute and will people know what to do with a
filter that seems to output as safe json, but turns out it is only in
certain circumstances.
I would propose that we have a simple filter that outputs the json in a
<script type="application/json"></script> block
{{{
{{ data|as_json_script:"id_data" }}
}}}
which would output
{{{
<script id="id_data" type="application/json">{"hello": ["world",
"universe"]}</script>
}}}
and which can then be read in by other javascript
{{{
var data = JSON.parse(document.getElementById("id_data").textContent)
}}}
or similar with jquery etc
This doesn't leave developers under any illusion that it could be used in
html attribute or within a script tag and has the added advantage that it
facilitates moving away from inline javascript which is better for
supporting good CSP policies.
Would be happy to put together a pull request if there was support for
this approach.
--
Ticket URL: <https://code.djangoproject.com/ticket/17419#comment:31>
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