// Base64字符串
var base64String = "SGVsbG8gV29ybGQh"; // Hello World!的base64编码
// 创建Uint8Array类型的视图来存储二进制数据
var binaryData = atob(base64String);
var len = binaryData.length;
var bytes = new Uint8Array(len);
for (var i = 0; i < len; ++i) {
bytes[i] = binaryData.charCodeAt(i);
}
// 创建Blob对象
var blob = new Blob([bytes], { type: 'text/plain' });
console.log("成功生成Blob对象!");
console.dir(blob);