Encoding and decoding data in Base64 using native TypeScript types

When working in Node.js, I can utilize the Buffer class with both toString variations and the base64Slice method.

In JavaScript within a browser, the btoa function is available for encoding.

Despite these native options, I am struggling to find a built-in conversion method in TypeScript without importing node type definitions. Is there a way to achieve this using only TypeScript?

My goal is to:

let plainTextString : string = "test"
let byteArrayUint : Uint8Array = new Uint8Array([74, 65, 73, 74])
let byteArrayArr : Array<number> ​= [74, 65, 73, 74]
method(any_variable)
any_variable.method()

Is it feasible to accomplish this? Any pointers would be greatly appreciated. Thank you.

typescriptbase64

Answer №1

TypeScript operates independently of a runtime environment, lacking both a core and standard library to rely on. In fact, TypeScript could be argued to have no inherent libraries or runtime semantics whatsoever!

When you execute a TypeScript program, it must be within the confines of a specific runtime (whether it's Deno, JRE, CLI, WSH, DOM, ECMAScript 2020, Node.js, etc.), which provides all necessary runtime objects, functions, modules, classes, and libraries.

Can this be achieved?

No, carrying out Base64 conversion in pure TypeScript is not feasible. In fact, performing any task solely with native TypeScript code is impossible.

Essentially, running a TypeScript program without the support of a runtime is an impossible feat. Every function utilized originates from the runtime being employed. Therefore, you can only access functionalities provided by that particular runtime.

Even if you painstakingly implemented Base64 encoding from scratch, external functionalities like strings and numbers (which are part of ECMAScript, not TypeScript) would still be essential.

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