canvas todataurl returns undefined
//use callbacks instead of return, ex.
function getImageDataURL(local_name, w, h, i, callback) {
var data, canvas, ctx;
var img = new Image();
img.src = "https://wallpapercave.com/wp/wp5042624.png";
img.onload = function (){
canvas = document.createElement('canvas');
canvas.width = w;
canvas.height = h;
ctx = canvas.getContext("2d");
ctx.drawImage(img,0,0,w,h);
callback(canvas.toDataURL("image/png"));
}
}
getImageDataURL('image', 100, 100, 'image.png', function (data) {
console.log(data);
});