JSFiddle - React, Tailwind, and code Playground

by c0bra

HTML

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

CSS

#canvas {
    background: #ddd;
}

JavaScript

var amount = 80;

var paper = Raphael("canvas", 400, 400);
paper.customAttributes.arc = function(xloc, yloc, value, total, R) {
    var alpha = 360 / total * value,
        a = (90 - alpha) * Math.PI / 180,
        x = xloc + R * Math.cos(a),
        y = yloc - R * Math.sin(a),
        path;
    if (total == value) {
        path = [
            ["M", xloc, yloc - R],
            ["A", R, R, 0, 1, 1, xloc - 0.01, yloc - R]
            ];
    } else {
        path = [
            ["M", xloc, yloc - R],
            ["A", R, R, 0, +(alpha > 180), 1, x, y]
            ];
    }
    return {
        path: path
    };
};

var backCircle = paper.circle(100, 100, 40).attr({
    // "stroke": "#7BC2E5",
    // "stroke-width": 14
    "fill": "#7BC2E5"
});
return;

var theArc = paper.path().attr({
    "stroke": "#f5f5f5",
    "stroke-width": 14,
    arc: [100, 100, 0, 100, 40]
});


//event fired on each animation frame
eve.on("raphael.anim.frame.*", onAnimate);

//text in the middle
theText = paper.text(100, 100, "0%").attr({
    "font-size": 18,
    "fill": "#f5f5f5",
    "font-weight": "bold"
});

//the animated arc
theArc.rotate(180, 100, 100).animate({
    arc: [100, 100, amount, 100, 40]
}, 1900, function() {
    //when the animation is done unbind
    eve.unbind("raphael.anim.frame.*", onAnimate);
});


//on each animation frame we change the text in the middle

function onAnimate() {
    var howMuch = theArc.attr("arc");
    theText.attr("text", Math.floor(howMuch[2]) + "%");
}