Ua-parser-js only supports the CommonJS module. And when exporting, the export statement is not found:
if (typeof(exports) !== UNDEF_TYPE) {
// nodejs env
if (typeof module !== UNDEF_TYPE && module.exports) {
exports = module.exports = UAParser;
}
exports.UAParser = UAParser;
} else {
// requirejs env (optional)
if (typeof(define) === FUNC_TYPE && define.amd) {
define(function () {
return UAParser;
});
} else if (typeof window !== UNDEF_TYPE) {
// browser env
window.UAParser = UAParser;
}
}
Nevertheless, why can I import UAParser by import { UAParser } from 'ua-parser-js'? This code was shown in the following SO answer and GitHub issue.
There are two ways how this might work:
import { UAParser } from 'ua-parser-js' statement into the legacy const { UAParser } = require('ua-parser-js');, which is then executed by nodemodule.exports = UAParser; will be available as the default import, the exports.UAParser = UAParser; will be available the a named import you're doing.