JSFiddle - React, Tailwind, and code Playground

by pajtai

HTML

<div id="canvas"></div>

JavaScript

window.onload = function() {
    var R = Raphael("canvas", 500, 500),
    c = R.circle(100, 100, 50).attr({
        fill: "hsb(.8, 1, 1)",
        stroke: "none",
        opacity: .5
    }),
    d = R.circle(200, 200, 50).attr({
        fill: "hsb(1, 1, .8)",
        stroke: "none",
        opacity: .5
    }),        
    start = function () {
        // storing original coordinates
        this.ox = this.attr("cx");
        this.oy = this.attr("cy");
        this.attr({opacity: 1});
    },
    move = function (dx, dy) {
        // move will be called with dx and dy
        this.attr({cx: this.ox + dx, cy: this.oy + dy});
    },
    up = function () {
        // restoring state
        this.attr({opacity: .5});
        this.undrag(); // Try to make it undragable
    };

    c.drag(move, start, up);    
    d.drag(move, start, up);     
};