JSFiddle - React, Tailwind, and code Playground

by Victor Gomes

HTML

<img id="preview1" crossorigin="anonymous" >

JavaScript

function getBase64Image(img) {
    // Create an empty canvas element
    var canvas = document.createElement("canvas");
    canvas.width = img.width;
    canvas.height = img.height;

    // Copy the image contents to the canvas
    var ctx = canvas.getContext("2d");
    ctx.drawImage(img, 0, 0);

    // Get the data-URL formatted image
    // Firefox supports PNG and JPEG. You could check img.src to
    // guess the original format, but be aware the using "image/jpg"
    // will re-encode the image.
    return canvas.toDataURL("image/png");
}

var im = new Image();
im.onload = function(ev) {
    var im = ev.target;
    var img = document.getElementById("preview1");
    img.src = getBase64Image(im);
}
im.src = "http://www.gravatar.com/avatar/0e39d18b89822d1d9871e0d1bc839d06?s=128&d=identicon&r=PG"