javascript - Python Flask App: how to access container environment variables inside java script file

Question

i'm programming a python flask app which has some java script files. There are some environment variables that were defined when the container is deployed to kurbenetes. How to access this variables for a java script file inside an flask application ?

In Python it would be with os.environ['Variable'] = 'some_value'. How about javascript ?

Thank you

question from:https://stackoverflow.com/questions/65884517/python-flask-app-how-to-access-container-environment-variables-inside-java-scri

Answer 1

I am sure there are several viable solutions, but I would use data attributes.

So basically you render the variables via your templates as HTML, and then access them in your JavaScript.

Example from the linked article

<article
  id="electric-cars"
  data-columns="3"
  data-index-number="12314"
  data-parent="cars">
...
</article>

And then you'd access the element and its attributes via JavaScript.

As an alternative, you could generate the JavaScript code from your backend.

As a third way, you could call your backend via http from your JavaScript code.