Extract a javascript variable with flask

Question

I am working on a little flask project and in my javascript script I have a variable which works as a counter.

When I receive a POST request I would like my python script to extract this counter variable.

I tried to set a jinja2 variable by doing {%set extractor_var = js_counter%} but it seems to be impossible to use a javascript variable inside a jinja2 template.

Can anyone lead me to another solution?

Answer 1

That doesn't make sense!
Flask/Jinja can't read from javascript vars.
However, (as you said it is a POST request) you could:

Three ways:

• Passing (dynamically modifying DOM link or form action URL) counter var value to POST request URL, like: /path/postaction?counter=4;
• If it's a POST request from form you could modify form action (see above) or adding a input hidden to form;
• Setting a cookie and get it in the next request (I don't like this option);