Error actions

The ErrorAction parameter and the ErrorActionPreference variable are used to control what happens when a non-terminating error is written.

ErrorAction parameter requires CmdletBinding.

The ErrorAction parameter is only available if a function declares the CmdletBinding attribute. CmdletBinding automatically added is if the Parameter attribute is used.

By default, ErrorAction is set to continue. Any non-terminating errors will be displayed, but a script or function will continue to run.

If ErrorAction is set to SilentlyContinue, errors will be added to the $error automatic variable, but the error won't be displayed.

The following function writes a non-terminating error using Write-Error:

function SilentError { 
    [CmdletBinding()] 
    param ( ) 
 
    Write-Error 'Something went wrong' 
} 
 SilentError -ErrorAction SilentlyContinue 

The error is written...