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dbrattli/ThenExtension.fs

Created October 14, 2018 15:52
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Promise Then Extension
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ThenExtension.fs
// Make a new extension method on Promise
type Promise<'a> with
member this.Then(fn: 'a -> Promise<'b>) : Promise<'b> =
let newPromise = Promise<'b> ()
this.Then(fun a ->
let tmpPromise = fn a
tmpPromise.Then(newPromise.Resolve).Catch(newPromise.Reject)
|> ignore
).Catch(newPromise.Reject)
|> ignore
newPromise
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