I have imported a module into my project. When running it separately it works fine. As soon as I want to use it in the browser it causes problems.

Uncaught TypeError: Failed to resolve module specifier "theblockchainapi". Relative references must start with either "/", "./", or "../".

This is how my import looks:

<script type="module" src="./app.js"></script>

the app.js starts with:

import theblockchainapi from 'theblockchainapi';