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Encode and decode base64

import { atob, btoa } from "@antithrow/std";

const encoded = btoa("hello");         // Ok("aGVsbG8=")
const decoded = atob("aGVsbG8=");      // Ok("hello")

const bad = atob("not-base64!!");      // Err(DOMException)

When the globals throw​

  • btoa(data) throws DOMException ("InvalidCharacterError") if data contains characters outside the Latin-1 range.
  • atob(data) throws DOMException for any input that isn't valid base64.

Both wrappers capture these as Err(DOMException).

Binary data​

Neither global works directly on raw bytes. If you have a Uint8Array:

import { btoa } from "@antithrow/std";

const binary = String.fromCharCode(...bytes);
const b64 = btoa(binary);

See also​