Are you using Firefox? I'm using a JS feature which doesn't appear to be supported in Firefox at all. https://caniuse.com/mdn-javascript_statements_import_imp

Are you using Firefox? I'm using a JS feature which doesn't appear to be supported in Firefox at all. https://caniuse.com/mdn-javascript_statements_import_import_attributes https://caniuse.com/mdn-javascript_statements_import_import_... I've pushed a fix and it should work now. Thanks for giving it a try!