Menene bambancin tsakanin any da unknown?

Question

Accepted Answer

Dukansu zasu iya riƙe da *kome* ƙima, amma suna banbanta a **kariya**. `any` yana bugi jajjewar nau'in; `unknown` yana kasance waje kuma yana buƙatar ka ƙirƙira kafin amfani.

```ts
let a: any = "hello";
a.foo.bar;        // ✅ compiles — no checking at all (may crash at runtime)
a();              // ✅ compiles — TypeScript trusts you blindly

let u: unknown = "hello";
u.toUpperCase();  // ❌ Error: object is of type 'unknown'
u();              // ❌ Error — must narrow first
```

## unknown yana buƙatar jajjewar kafin amfani

```ts
function handle(input: unknown) {
  if (typeof input === "string") {
    input.toUpperCase(); // ✅ inside the guard, TS knows it's a string
  }
}
```

`unknown` shine **matsayin kariya na `any`**: kana iya sanya abin da dama a gare shi, amma ba za ka iya yin abin da dama da shi ba sai kawai ka tabbatada abin da ake shan gida ta hanyar nau'i gadi.

## Lokacin da za a yi amfani da waɗansu

- **`unknown`** — don ƙimomin jigon nau'i ainihi a bakin kulli: sakamakon `JSON.parse`, amsa API, `catch (e: unknown)`. Yana buƙatar ka tabbatar da shi.
- **`any`** — dereva tafiya lokacin da you jiyya JavaScript ko da yaushe ba za ka iya taɓa abin da dama ba. Yi amfani da kariya; yana ɓaje-ɓajewa shiru kuma yana cusewa kariya.

## Me ya sa ya baka mahimma

Zuwa `any` yana karye burin TypeScript.

Gida `unknown` a bakin kulli mara nau'i — yana ajiye garanti na compiler habada har yanzu yana karbon shiryawa katsina, yana buƙatar ka tabbatar da bayani kafin gaskiya da shi.