Uninstall npm packages by scanning packages.json file.

Uninstall-NpmPackages.ps1

Function Uninstall-NpmPackages {
    Param (
        # Optional path to package.json
        [String]$pathToPackage = $(Resolve-Path "package.json")
    )
    
    # Read the json content
    $json = (Get-Content $pathToPackage) -join "`n" | ConvertFrom-Json
    
    # Loop over each package in devDependencies
    ForEach ($dep in $json.devDependencies.psobject.properties.name) {
        # Uninstall the package
        iex "npm uninstall $dep"
        #iex "echo $dep"
    }
}

#Uninstall-NpmPackages