Error action

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

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

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

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

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

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

The error...