Factorio.com|Forums|Wiki|Mod Portal|API Docs Prototype|Runtime|Auxiliary

# Factorio Runtime Docs Version 2.0.7

## ModChangeData :: table

#### Table fields

old_version | :: string | Old version of the mod. May be `nil` if the mod wasn't previously present (i.e. it was just added).
Old version of the mod. May be `nil` if the mod wasn't previously present (i.e. it was just added).
new_version | :: string | New version of the mod. May be `nil` if the mod is no longer present (i.e. it was just removed).
New version of the mod. May be `nil` if the mod is no longer present (i.e. it was just removed).