Why ScriptBlock in PowerShell delays output until the ScriptBlock completes?

Why ScriptBlock in PowerShell delays output until the ScriptBlock completes?

I have this code:

Function-Step "Long operation" { MyLongRunningFunction } function Function-Step { param([string]$message,[ScriptBlock]$block) Write-Host $message Read-Host $block.Invoke() }

MyLongRunningFunction writes information to the standard output as it runs, but it doesn't show in the console until the function finishes, suddenly.

MyLongRunningFunction

It seems that it's eating all the output of MyLongRunningFunction ends, and after that, it throws all the output at the same time.

MyLongRunningFunction

How can I avoid this behavior?

Use Jobs? That's the most straightforward way.
– TheIncorrigible1
Jul 2 at 1:01

$block.Invoke() -> & $block
– PetSerAl
Jul 2 at 3:14

$block.Invoke()

& $block

Use @PetSerAl Answer. That will keep the handle with the function itself.
– Rohin Sidharth
Jul 2 at 6:08

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