I'm trying to have all my pages use one html file for a navbar but I cant get it to load in

I tried using javascript to load it in from a static file

$(function(){
$("#navbar").load("/navbar");
});

I also tried it by loading it as a seprate route and trying to reference it that way.

does anyone know if there is a way to get this working, through python or javascript?

/r/flask
https://redd.it/130x3cx