Lua has very similar rules to JS regarding semicolons from the user's perspective: semicolons are optional, and only change a programs meaning in some very unus

Lua has very similar rules to JS regarding semicolons from the user's perspective: semicolons are optional, and only change a programs meaning in some very unusual edge cases. From a PL design perspective, they're fairly different, though. Lua's grammar doesn't have a statement terminator, and the language just lets you insert semicolons anywhere that doesn't appear inside a statement if you so wish. JS's grammar does have a statement terminator, but has rules for inferring it in some places when it's not present. Does this distinction matter in practice? Probably not. The more important different is probably just that JS has more unfortunate edge cases related to semicolons than Lua.