How to retrieve recursively any files with a specific extensions in PowerShell?

Question

If sorting by Length is not a necessity, you can use the -Name parameter to have Get-ChildItem return just the name, then use [System.IO.Path]::GetFileNameWithoutExtension() to remove the path and extension:

Get-ChildItem -Path .\ -Filter *.js -Recurse -File -Name| ForEach-Object {
    [System.IO.Path]::GetFileNameWithoutExtension($_)
}

If sorting by length is desired, drop the -Name parameter and output the BaseName property of each FileInfo object. You can pipe the output (in both examples) to clip, to copy it into the clipboard:

Get-ChildItem -Path .\ -Filter *.js -Recurse -File| Sort-Object Length -Descending | ForEach-Object {
    $_.BaseName
} | clip

If you want the full path, but without the extension, substitute $_.BaseName with:

$_.FullName.Remove($_.FullName.Length - $_.Extension.Length)

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