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

(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.

Parameters

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

Returns

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)

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)

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<string> — Convert a Blob to a base64 data URL string (resolves to a string like data:<type>;base64,<data>).

Notes

• If you have a full data URL (data:<type>;base64,<data>), 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