8 ms·
No, TypeScript is compile time only. There's no runtime type info.
by james-mcelwain 6y ago
No, TypeScript is compile time only. There's no runtime type info.
- whatshisface 6y agoThe parent comment is saying that if you write the string twice, you can get the compiler to check #1 and the runtime to use #2.
- ricksharp 6y agoNot exactly (there is no duplication), a string constant in typescript is it's own type: const sql = 'SELECT ...'; type SQL = typeof sql; // type SQL = "SELECT ..."