Under the hoodTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
ConfigurationArea: what it touches
Internal ChangesKind: in v2.1.248,
Internal ChangesSection of the release
What
Several hundred environment and config values are now declared with typed constructors instead of ad-hoc parsing. One of them, a three-state boolean, returns true, false, or nothing at all when the variable is unset, so a setting that is explicitly off can be told apart from one that was never set and should defer to a remote or policy default.
Details
The other constructors cover strings, integers and enumerations; the string coercion turns text into a boolean, and the enumeration trims the value and rejects anything not on its list.
Evidence
triBool: () => f(),
Strings lifted out of the shipped bundle, so the claim above can be checked against them.