rollbar
Error 'Headers undefined' in bundle on IE11
I get the error:
ReferenceError: 'Headers' is undefined
When importing (import Rollbar from 'rollbar') in production mode in IE11. I inspected the minimized bundles and it seems that the polyfills for fetch.Headers are not included in the bundles (e.g. /dist/rollbar.min.js, v2.24.1). I suspect that this is why it works in e.g. Chrome but not in IE11 which does not have the fetch API?
Rollbar.js doesn't provide a polyfill, as the code path is only executed when the application code uses fetch either natively or via its own polyfill. That said, I'm sure there's more than one fetch polyfill that doesn't implement Headers. Thank you for the report, and I'll have a PR ready shortly.
@JensMadsen Just now released in v2.25.2. https://github.com/rollbar/rollbar.js/releases/tag/v2.25.2