django how to include javascript in template

urls.py

from django.conf.urls import include, url
from django.contrib import admin

urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
]

settings.py

STATICFILES_DIRS = (
    os.path.join(BASE_DIR, "static"),
)

STATIC_URL = '/static/'

# remove STATIC_ROOT

base.html

Your title tag was not closed.

<!DOCTYPE html>
<head>
  {% load static %}
  <script src="{% static 'app.js' %}"></script>   
  <title>Site</title>
</head>
<body>
<img src="{% static 'img.png' %}" alt="Mon image" />
  {% block content %}{% endblock %}
</body>
</html>

Your template should say {% load staticfiles %} instead of {% load static %}

Source: https://docs.djangoproject.com/en/1.8/howto/static-files/

Also, os.path.join(BASE_DIR, "static"), only looks for static files in your apps, as in app/static/app/static.js. If you have static files that do not belong to any specific app, but rather to the project, you need to add the folder explicitly. See point 4 of 'Configuring static files' on the docs page I mentioned.


From my understanding, the STATICFILES_DIRS should be in the settings.py and defined like this:

STATICFILES_DIRS = [
    os.path.join(BASE_DIR, "static"),
]

Please check the documentation.