<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
</body>
<script>
function getBase64Image(img) {
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0, img.width, img.height);
var ext = img.src.substring(img.src.lastIndexOf(".")+1).toLowerCase();
var dataURL = canvas.toDataURL("image/"+ext);
return dataURL;
}
var img = "img/bd_logo1.png";
var image = new Image();
image.src = img;
image.onload = function(){
var base64 = getBase64Image(image);
console.log(base64);
}
</script>
</html>
转载于:https://my.oschina.net/u/3407699/blog/1563221