Interface: Promise<T>
Represents the completion of an asynchronous operation
Type Parameters
T
T
Properties
[toStringTag]
readonly[toStringTag]:string
Methods
finally()
Call Signature
finally(
onfinally?):Promise<T>
Attaches a callback that is invoked when the Promise is settled (fulfilled or rejected). The resolved value cannot be modified from the callback.
Parameters
onfinally?
() => void
The callback to execute when the Promise is settled (fulfilled or rejected).
Returns
Promise<T>
A Promise for the completion of the callback.
Call Signature
finally(
always):any
Parameters
always
(value?) => any
Returns
any
then()
then<
TResult1,TResult2>(onfulfilled?,onrejected?):Promise<TResult1|TResult2>
Attaches callbacks for the resolution and/or rejection of the Promise.
Type Parameters
TResult1
TResult1 = T
TResult2
TResult2 = never
Parameters
onfulfilled?
(value) => TResult1 | PromiseLike<TResult1>
The callback to execute when the Promise is resolved.
onrejected?
(reason) => TResult2 | PromiseLike<TResult2>
The callback to execute when the Promise is rejected.
Returns
Promise<TResult1 | TResult2>
A Promise for the completion of which ever callback is executed.
catch()
catch<
TResult>(onrejected?):Promise<T|TResult>
Attaches a callback for only the rejection of the Promise.
Type Parameters
TResult
TResult = never
Parameters
onrejected?
(reason) => TResult | PromiseLike<TResult>
The callback to execute when the Promise is rejected.
Returns
Promise<T | TResult>
A Promise for the completion of the callback.