Relative paths with fetch in Javascript

Question

I was surprised by an experience with relative paths in Javascript today. I’ve boiled down the situation to the following:

Suppose you have a directory structure lik

Answer 1

This is not exactly a recommendation since it relies on a number of things that aren't guaranteed to work everywhere or to continue to work into the future, however it works for me in the places I need it to and it might help you.

const getRunningScript = () => {
    return decodeURI(new Error().stack.match(/([^ \n\(@])*([a-z]*:\/\/\/?)*?[a-z0-9\/\\]*\.js/ig)[0])
}

fetch(getRunningScript() + "/../config.json")
  .then(req => req.json())
  .then(config => {
    // code
  })