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⚠️ Archived Version

You are viewing documentation for Design Editor version 7.3, which is no longer actively maintained. For the latest features and updates, please refer to the current version (7.4).

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.

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