https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array/fromBase64#decoding_a_base64_string

const uint8Array = Uint8Array.fromBase64("PGI+ TURO PC9i Ph");
console.log(uint8Array); // Uint8Array(10) [60, 98, 62, 77, 68, 78, 60, 47, 98, 62]

https://caniuse.com/mdn-javascript_builtins_uint8array_frombase64

https://github.com/zloirock/core-js#uint8array-to--from-base64-and-hex

https://www.npmjs.com/package/es-arraybuffer-base64