function btoa
Usage in Deno
```typescript import { btoa } from "node:node__buffer.d.ts"; ```
btoa(data: string): string
Decodes a string into bytes using Latin-1 (ISO-8859), and encodes those bytes
into a string using Base64.
The `data` may be any JavaScript-value that can be coerced into a string.
**This function is only provided for compatibility with legacy web platform APIs**
**and should never be used in new code, because they use strings to represent**
**binary data and predate the introduction of typed arrays in JavaScript.**
**For code running using Node.js APIs, converting between base64-encoded strings**
**and binary data should be performed using `Buffer.from(str, 'base64')` and `buf.toString('base64')`.**
string