<!DOCTYPE html>

<html>

    <head>

        <meta charset="utf-8">

        <meta http-equiv="X-UA-Compatible" content="IE=edge">

        <meta name="viewport" content="width=device-width,initial-scale=1">

        <title>Data Visualisation with a Scatterplot Graph</title>

        <meta name="description" content="A single page web app for visualising data with a scatterplot graph.">

        <meta name="keywords" content="Data Visualisation, Scatterplot Graph, D3.js">

        <script src="https://d3js.org/d3.v5.min.js"></script>

        <style>

            /* App CSS Goes Here */

            .dot {

                stroke: #000;

            }

            .tooltip {

                position: absolute;

                width: 200px;

                height: 28px;

                pointer-events: none;

            }

        </style>

    </head>

    <body>

        <div id="main-container">

            <h1 id="title">Scatterplot Graph</h1>

            <div id="tooltip" class="tooltip" style="opacity:0;"></div>

            <svg id="canvas"></svg>

        </div>



        <script type="text/javascript">

            // App Javascript Goes Here

            document.addEventListener("DOMContentLoaded", function() {

                var url = "https://raw.githubusercontent.com/freeCodeCamp/ProjectReferenceData/master/cyclist-data.json";

                d3.json(url).then(function(data) {

                    var svg = d3.select("#canvas"),

                        margin = {top: 20, right: 20, bottom: 30, left: 50},

                        width = 960 - margin.left - margin.right,

                        height = 500 - margin.top - margin.bottom;



                    var x = d3.scaleTime().range([0, width]);

                    var y = d3.scaleTime().range([height, 0]);



                    var xAxis = d3.axisBottom(x).tickFormat(d3.timeFormat("%Y"));

                    var yAxis = d3.axisLeft(y).tickFormat(d3.timeFormat("%M:%S"));



                    var g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");



                    x.domain(d3.extent(data, function(d) { return d.Year; }));

                    y.domain(d3.extent(data, function(d) { return d.Time; }));



                    g.append("g")

                        .attr("class", "axis axis--x")

                        .attr("transform", "translate(0," + height + ")")

                        .call(xAxis);



                    g.append("g")

                        .attr("class", "axis axis--y")

                        .call(yAxis);

                    

                    g.selectAll(".dot")

                        .data(data)

                        .enter().append("circle")

                        .attr("class", "dot")

                        .attr("r", 3.5)

                        .attr("cx", function(d) { return x(d.Year); })

                        .attr("cy", function(d) { return y(d.Time); })

                        .attr("data-xvalue", function(d) { return d.Year; })

                        .attr("data-yvalue", function(d) { return d.Time; });

                });

            });

        </script>

    </body>

</html>