toDataURL ném Uncaught Security exception trong HTML

Để khắc phục Uncaught Security Exception, thêm thuộc tính crossorigin:

<img id = "myid" crossorigin = "anonymous" src="https://www.tutorialspoint.com/images/seaborn-4.jpg?v=2"> function getBase64() {    var myImg = document.getElementById("myid");    var c = document.createElement("canvas");    c.width = myImg.width;    c.height = myImg.width;    var context = c.getContext("2d");    context.drawImage(img, 0, 0);    var dataURL = c.toDataURL("image/png");    alert(dataURL.replace(/^data:image\/(png|jpg);base64,/, "")); } getBase64();