JSFiddle - React, Tailwind, and code Playground

CSS

html {
    background: #000;
}

JavaScript

var CP = window.CanvasRenderingContext2D && CanvasRenderingContext2D.prototype;
if (CP.lineTo) {

    CP.dashedLine = CP.dashedLine || function (x, y, x2, y2, da, offset) {
        if (!da) da = [10, 5];
        if (!offset) offset = 0;
        if (CP.setLineDash && typeof (CP.lineDashOffset) == "number") {
            this.save();
            this.setLineDash(da);
            this.lineDashOffset = offset;

            this.moveTo(x, y);
            this.lineTo(x2, y2);

            this.restore();
            return;
        }



        this.save();
        var dx = (x2 - x),
            dy = (y2 - y);
        var len = Math.sqrt(dx * dx + dy * dy);
        var rot = Math.atan2(dy, dx);
        this.translate(x, y);
        this.moveTo(0, 0);
        this.rotate(rot);
        var dc = da.length;
        var di = 0;

        var patternLength = 0;
        for (var i = 0; i < dc; i++) {
            patternLength += da[i];
        }
        if (dc % 2 == 1) {
            patternLength *= 2;
        }

        offset = offset % patternLength;
        if (offset < 0) {
            offset += patternLength;
        }

        var startPos = 0;
        var startSegment = 0;
        while (offset >= startPos) {



            if (offset >= startPos + da[startSegment % dc]) {
                startPos += da[startSegment % dc];
                startSegment++;
            } else {
                offset = Math.abs(offset - startPos);
                break;
            }


            if (startSegment > 100) break;
        }
        draw = startSegment % 2 === 0;
        x = 0;
        di = startSegment;


        while (len > x) {
            var interval = da[di++ % dc];
            if (x < offset) {
                interval = Math.max(interval - offset, 1);
                offset = 0;
            }

            x += interval;
            if (x > len) x = len;
            draw ? this.lineTo(x, 0) : this.moveTo(x, 0);
            draw = !draw;
        }
       ...