JS Picture Conversion Base64 Base64 convert to file object

function GetImgToBase64 (url,callback) {//Convert picture to Base64  var canvas = document.createelement (' canvas '),    CTX = Canvas.getcontext (' 2d '),    img = new Image;  Img.crossorigin = ' Anonymous ';  Img.onload = function () {    canvas.height = img.height;    Canvas.width = Img.width;    Ctx.drawimage (img,0,0);    var dataurl = Canvas.todataurl (' image/png ');    Callback (Dataurl);    canvas = null;   };  img.src = URL;}

function Dataurltofile (dataurl, filename) {//convert Base64 to File
var arr = dataurl.split (', '), MIME = Arr[0].match (/:(. *); [1],
BSTR = Atob (arr[1]), n = bstr.length, U8arr = new Uint8array (n);
while (n--) {
U8arr[n] = bstr.charcodeat (n);
}
return new File ([U8arr], filename, {type:mime});
}

You can convert a picture to Base64

GetImgToBase64 (' Img/test.png ', function (data) {
var myFile = dataurltofile (data, ' testimgtestimgtestimg ');
Console.log (MyFile);
});

　

JS Picture Conversion Base64 Base64 convert to file object