本文实例为大家分享了Vue利用Blob下载原生二进制数组文件的具体代码，供大家参考，具体内容如下
在服务端推送过来的二进制数组(JSON格式），在前端要处理成JS原生数组以后才能做成Blob，有两个地方要注意（详细注释），代码如下：
Vue.prototype.$downloadFile = (filename, data) => {
if (!data) return;
let arr8 = Uint8Array.from(data); //！！！注意1：应根据数据的类型选择适当的JS原生数组类型进行转换，也就是说服务端推送的byte型数组还是int型数组等。
//定义文件内容，类型必须为Blob 否则createObjectURL会报错
let blob = null;
let type = 'application/octet-binary';
if (typeof (window.Blob) == "function") {
blob = new Blob([arr8], {//！！！注意2：数组两边必须加上[]
type: type
});
} else {
let BlobBuilder = window.BlobBuilder || window.MozBlobBuilder || window.WebKitBlobBuilder || window.MSBlobBuilder;
let bb = new BlobBuilder();
bb.append([arr8]);
blob = bb.getBlob(type);
}
let URL = window.URL || window.webkitURL;
let bloburl = URL.createObjectURL(blob);
let anchor = document.createElement("a");
if ('download' in anchor) {
anchor.style.visibility = "hidden";
anchor.href = bloburl;
anchor.download = filename;
document.body.appendChild(anchor);
let evt = document.createEvent("MouseEvents");
evt.initEvent("click", true, true);
anchor.dispatchEvent(evt);
document.body.removeChild(anchor);
} else if (navigator.msSaveBlob) {
navigator.msSaveBlob(blob, filename);
} else {
location.href = bloburl;
} //移除链接释放资源
};
