JSFiddle - React, Tailwind, and code Playground

by confile

HTML

<div id="container"></div>
<script src="https://dl.dropboxusercontent.com/u/47067729/konva.min.js"></script>

CSS

#container {
    border: 1px solid green;
    background-color: lime;
}

JavaScript

console.clear();

var history = new Array();

var imageObj = new Image();
var img = null;
var offsetX = 0;
var offsetY = 0;
var degrees = 45;

stage = new Konva.Stage({
    container: 'container',
    width: 600,
    height: 400
});
layer = new Konva.Layer();
stage.add(layer);

var rect = new Konva.Rect({
    x: 0,
    y: 0,
    width: 438,
    height: 300,
    fill: 'yellow'
});
layer.add(rect);

var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');


var circle = new Konva.Circle({
    x: 0,
    y: 0,
    radius: 40,
    opacity: 0.7,
    fill: '#ff5e0a',
    stroke: '#d95009',
    strokeWidth: 1,
    draggable: true
});
layer.add(circle);


circle.on('dragmove touchmove', function (e) {
    draw(e.evt.clientX, e.evt.clientY, circle.radius(), img.x(), img.y());
});


imageObj.onload = function () {
    canvas.width = imageObj.width;
    canvas.height = imageObj.height;
    context.drawImage(imageObj, 0, 0, imageObj.width, imageObj.height);


    img = new Konva.Image({
        x: 50,
        y: 50,
        image: canvas
    });

    img.setRotation(degrees);
    
  //  offsetX = imageObj.width / 2;
  //  offsetY = imageObj.height / 2;
    
    img.setOffsetX(offsetX);
    img.setOffsetY(offsetY);
    img.x(img.x() + offsetX);
    img.y(img.y() + offsetY);

    
        // translate context to center of canvas
  //  context.translate(canvas.width / 2, canvas.height / 2);
    context.translate(offsetX, offsetY);
    
    context.rotate(degrees * Math.PI/180);
    
    
    layer.add(img);

    circle.moveToTop();
    layer.draw();
};

imageObj.crossOrigin = "anonymous";
imageObj.src = "https://dl.dropboxusercontent.com/u/47067729/darth-vader.jpg";




function draw(absX, absY, radius, imageX, imageY) {
    var x = 0;
    var y = 0;
    
    // set pointer
    circle.x(absX);
    circle.y(absY);

    imageX = imageX - (offsetX);
    imageY = imageY - (offsetY);
    
    x = absX - imageX;
    y = absY - imageY;

    // translate...