kotlin.js.Promise.then

then

open fun <S> then(
    onFulfilled: (T) -> S, 
    onRejected: (Throwable) -> S = definedExternally
): Promise<S>

Platform and version requirements: JS

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.js/-promise/then.html