How to create a valid empty JSON array with PowerShell?

Question

Converting arrays to JSON string in PowerShell couldn't be more simple:

@(1,2,3) | ConvertTo-Json

Produces:

[
    1,
    2,
    3
]

However if the array is empty the result is an empty string:

@() | ConvertTo-Json

Results an empty string instead of [].

Answer 1

It works without pipelining

PS C:\> ConvertTo-Json @()
[

]