Convert blobs to and from base64 data url strings.
Alternate of https://github.com/Xyfir/based-blob (DELETED somehow from both npm and github)

Usage

``js
(async function() {
const b = require('based-blob-js');

const base64String = 'some base64 data...';

const blob = b.toBlob(base64String);
const b64s = await b.toBase64(blob);

console.log(b64s == base64String); // true
})();
`

API

toBlob(base64[, contentType])

Converts a base64 data url string to a blob.

$3

- base64: string - The string to convert.
- contentType: string - Optional - Used for the Blob constructor.

$3

Blob - The blob built from the base64 string.

based-blob-js


Convert blobs to and from base64 data URL strings.

This project is written in TypeScript. The published package includes compiled JavaScript in dist/ and TypeScript declaration files (.d.ts) so TypeScript-aware editors and consumers get correct typings.

Quick Start

- Install: npm install based-blob-js
- Build (from source): npm run build (compiles src/ → dist/)

Usage (CommonJS)

`js
const { toBlob, toBase64 } = require('based-blob-js');

// toBlob expects raw base64 (no data: prefix)
const blob = toBlob('aGVsbG8=', 'text/plain');

(async () => {
const dataUrl = await toBase64(blob);
console.log(dataUrl); // data:text/plain;base64,aGVsbG8=
})();
`

Usage (ES Module / TypeScript)

`ts
import { toBlob, toBase64 } from 'based-blob-js';

const blob = toBlob('aGVsbG8=', 'text/plain');
const dataUrl = await toBase64(blob);
`

API

- toBlob(base64: string, contentType?: string): Blob — Create a Blob from a base64 string. Pass an optional contentType (MIME type).
- toBase64(blob: Blob): Promise — Convert a Blob to a base64 data URL string (resolves to a string like data:;base64,).

Notes

- If you have a full data URL (data:;base64,), strip the prefix before calling toBlob (e.g. base64 = dataUrl.split(',')[1]).
- Type definitions are emitted into dist/ when building so TypeScript consumers get typings via the types field in package.json.

Testing

- Run tests: npm test (Jest configured with a jsdom environment).

Contributing

- Make changes in src/, run npm run build`, and open a PR.

License

MIT