如何在JavaScript中将Blob转换为文件

如何在JavaScript中将Blob转换为文件

此函数将a转换

Blob

为a

File

，对我来说效果很好。

香草Javascript

function blobToFile(theBlob, fileName){    //A Blob() is almost a File() - it's just missing the two properties below which we will add    theBlob.lastModifiedDate = new Date();    theBlob.name = fileName;    return theBlob;}

Typescript （具有正确的键入）

public blobToFile = (theBlob: Blob, fileName:string): File => {    var b: any = theBlob;    //A Blob() is almost a File() - it's just missing the two properties below which we will add    b.lastModifiedDate = new Date();    b.name = fileName;    //Cast to a File() type    return <File>theBlob;}

用法

var myBlob = new Blob();//do stuff here to give the blob some data...var myFile = blobToFile(myBlob, "my-image.png");