Convert a base64 encoded string to an uint8 array

JavaScript version
const base64ToUint8 = (str) => Uint8Array.from(atob(str), (c) => c.charCodeAt(0));
TypeScript version
const base64ToUint8 = (str: string): Uint8Array => Uint8Array.from(atob(str), (c) => c.charCodeAt(0));
See also