method webcrypto.SubtleCrypto.exportKey
Usage in Deno
```typescript import { type webcrypto } from "node:node__crypto.d.ts"; ```
SubtleCrypto.exportKey(format: "jwk",key: CryptoKey,): Promise<JsonWebKey>
Exports the given key into the specified format, if supported.
If the `` is not extractable, the returned promise will reject.
When `format` is either `'pkcs8'` or `'spki'` and the export is successful,
the returned promise will be resolved with an `` containing the exported key data.
When `format` is `'jwk'` and the export is successful, the returned promise will be resolved with a
JavaScript object conforming to the [JSON Web Key](https://tools.ietf.org/html/rfc7517) specification.
key: CryptoKey
Promise<JsonWebKey>
`` containing ``.