@longmo-utils/browser / base64ToBlob

Function: base64ToBlob()

function base64ToBlob(
   base64, 
   options?, 
   sliceSize?): Blob;

将 Base64 字符串转换为 Blob

使用分片处理，兼顾性能和内存占用

Parameters

Parameter	Type	Default value	Description
base64	string	undefined	Base64 编码字符串
options?	BlobPropertyBag	undefined	Blob 配置选项
sliceSize?	number	8192	分片大小（字节），默认 8192

Returns

Blob

返回 Blob 对象

Examples

const base64 = 'aGVsbG8gd29ybGQ=';
const blob = base64ToBlob(base64);
console.log(blob.size); // 11

const jpegBase64 = '/9j/4AAQSkZJRg...';
const jpegBlob = base64ToBlob(jpegBase64, { type: 'image/jpeg' });

const dataUrl = 'data:image/png;base64,iVBORw0KGgoAAAANS...';
const base64 = dataUrl.split(',')[1];
const blob = base64ToBlob(base64, { type: 'image/png' });

const largeBase64 = '...'; // 大文件 Base64
const blob = base64ToBlob(largeBase64, { type: 'application/octet-stream' }, 16384);