sending data as JSON object from Python to Javascript with Jinja [duplicate]
The Flask Jinja2 documentation covers this pretty well. The first example under the "Standard Filters" section shows exactly how to embed a JSON object from python into a Javascript script:
<script type=text/javascript> doSomethingWith({{ user.username|tojson|safe }});</script>So in this case:
var lat_lng = {{ lat_lng|tojson|safe }};tojson calls dumps on the data, so you should pass the data directly to the template rather than calling dumps on it, otherwise you double-serialize the data and end up with a JSON string.