Template literal types jigħtuk il-possibbiltà li tibni tipi string literal ġodda billi tinterpolaa tipi oħra fi template — manipulazzjoni string fil-livell type.
ts
= ;
: = ;
: = ;
type Color = "red" | "blue";
type Shade = "light" | "dark";
type Variant = `${Shade}-${Color}`;
// "light-red" | "light-blue" | "dark-red" | "dark-blue" — all combinations
Il-compiler jespandi kull kombinazzjoni tal-unions — utli għat-trawwem ta' string keys validi (CSS classes, event names, route patterns) awtomatikament.
type Entity = "user" | "post";
type Event = `${Entity}:${"created" | "deleted"}`;
// "user:created" | "user:deleted" | "post:created" | "post:deleted"
function on(event: Event, cb: () => void) {}
on("user:created", () => {}); // ✅
on("user:updated", () => {}); // ❌ not a valid event
type Getters<T> = {
[K in keyof T & string as `get${Capitalize<K>}`]: () => T[K];
};
// { name: string } → { getName: () => string }
Uppercase, Lowercase, Capitalize, Uncapitalize huma intrinsic helpers built-in.
Template literal types jagħmlu string-based APIs type-safe: route params, event systems, CSS-in-JS, ORM column names.
F'ħdan li taċċetta kwalunkwe string, tista' tikkunfina għal sett preċiż u ġenerat ta' strings validi — taqbad typos fil-ħin tal-kompilazzjoni f'postijiet li normalment kienu stringly-typed.
Librerija ta' mistoqsijiet ta' intervisti tal-IT b'tweġibiet dettaljati — minn Junior sa Senior.
Iddona