https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
This is a naive-but-somewhat-functional initial implementation of HTML Storage. Note that there is no persistence yet, everything is in-process only, and one local Storage object per origin.