base64ToBlob#

Converts a base64 string (with data URL format) to a Blob object with MIME type and file extension.

Usage Scenarios#

• File Uploads: Prepare base64 images/files for upload
• Data Processing: Convert client-side base64 data to Blobs
• Image Manipulation: Process base64 image data before display

Examples#

import { base64ToBlob } from 'funtool';

// Convert base64 image
const base64 = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...';
const { blob, mime, ext } = base64ToBlob(base64);

// Use the Blob
const url = URL.createObjectURL(blob);
imgElement.src = url;

Signature#

function base64ToBlob(
  base64: string
): { blob: Blob; mime: string; ext: string }

Parameters#

• base64: Base64 string with data URL format (must include MIME prefix)

Return Value#

Returns an object with:

• blob: The converted Blob object
• mime: The MIME type extracted from the base64 string
• ext: The file extension derived from the MIME type

Error Handling#

• Throws error if base64 format is invalid
• Defaults to 'application/octet-stream' if MIME type cannot be determined
• Defaults to 'bin' extension if MIME type cannot be parsed