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I was originally looking for a way to have an open log file in VS Code update automatically as I watched it without installing an extension. I couldn't find an option to do that, and actually I think this answer works a treat.

RobG
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This answer describes how to tail a file in Powershell: https://stackoverflow.com/questions/4426442/unix-tail-equivalent-command-in-windows-powershell#:~:text=For%20completeness%20I%27ll%20mention%20that%20Powershell%203.0%20now%20has%20a%20%2DTail%20flag%20on%20Get%2DContent

The summary of that is: Get-Content 'yourfile.log' -wait -tail 30

In order to watch it, SPLIT your Terminal window in VS Code - terminals are listed to the right of the Terminal. Hover over your current terminal session in that list, choose SPLIT and then enter the get-content tail command of your log file in the new Terminal.

Image of VS Code split terminal windows

RobG
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