The unhandledrejection event is fired when a Promise is rejected but there is no rejection handler to deal with the rejection. The rejectionhandled event is fired when a Promise is rejected, and after the rejection is handled by the promise's rejection handling code.
Method of indicating a progress state.
JAVASCRIPT unhandledrejection/rejectionhandled events
Chrome version 4 to 35 doesn't supports. Chrome version 36 to 70 suppports JAVASCRIPT unhandledrejection/rejectionhandled events
.
Firefox version 2 to 63 doesn't supports JAVASCRIPT unhandledrejection/rejectionhandled events
.
IE browser version 6 to 11 doesn't supports JAVASCRIPT unhandledrejection/rejectionhandled events
.
Safari browser version 3.1 to 9 doesn't supports. Safari browser version 9.1 to 12 supports JAVASCRIPT unhandledrejection/rejectionhandled events
.
Microsoft Edge browser version 12 to 18 doesn't supports JAVASCRIPT unhandledrejection/rejectionhandled events
property.
Opera version 10.1 and 35 doesn't supports JAVASCRIPT unhandledrejection/rejectionhandled events
. Opera version 36 to 53 supports JAVASCRIPT unhandledrejection/rejectionhandled events
.
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