const b64 = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAmAAAABpCAYAAACd....";

const blob = nx.base64ToBlob(b64);
const urlCreator = window.URL || window.webkitURL;
const imageEl = document.getElementById("image");

imageEl.src = urlCreator.createObjectURL(blob);