Use createOtlpFetchExportDelegate instead. Modern browsers use fetch with keepAlive: true when sendBeacon is used. Use a fetch polyfill that mimics this behavior to keep using sendBeacon.
fetch
keepAlive: true
sendBeacon
Deprecated
Use createOtlpFetchExportDelegate instead. Modern browsers use
fetchwithkeepAlive: truewhensendBeaconis used. Use afetchpolyfill that mimics this behavior to keep usingsendBeacon.