D3 Examples - clean start

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<!DOCTYPE html>
<html>
    <meta charset="utf-8">
    <script src="https://d3js.org/d3.v5.min.js"></script>
    <script src="https://d3js.org/d3-scale-chromatic.v1.min.js"></script> <!-- for color scales -->
​
    <!-- Example based on https://bl.ocks.org/mbostock/3887118 -->
    <!-- Tooltip example from https://www.d3noob.org/2013/01/adding-tooltips-to-d3js-graph.html -->
​
    <style>
        body { font-family: calibri; }
        .axis { font: 14px calibri; }
        .label {font: 16px calibri; }
​
        .tooltip {
            position: absolute;
            width: 150px;
            height: 60px;
            background: #f2f2f2;
            pointer-events: none;
        }
    </style>
​
    <body>
        <h2>Top 5 Deaths in Alaska</h2>
        <div><svg id="chart1" width="700" height="250"></svg></div>
        <h2>Top 5 Deaths in Florida</h2>
        <div><svg id="chart2" width="700" height="250"></svg></div>
​
        <script>
            function restructure_data(data){
                var result = []
                var obj = {}
                var allKeys = []
                var maxPercent = 0
                for(var i=0; i<data.length;i++){
                    d = data[i]
                    year = d.Year
                    if (Object.keys(obj).indexOf(d.Year+'-'+d.State)==-1){
                        detail={}
                        detail[d.Cause] = +d.percentage
                        obj[d.Year+'-'+d.State] = detail
                    }else{
                        current = obj[d.Year+'-'+d.State]
                        current[d.Cause] = +d.percentage
                        obj[d.Year+'-'+d.State] = current
                    }
                }
                console.log(obj)
                yearKeys = Object.keys(obj)
                results = []
                res = {}
                for(var i=0; i<yearKeys.length; i++){
                    o = {}
                    yearKey = yearKeys[i]
                    year_state = yearKeys[i]
                    year = yearKeys[i].split("-")[0]
                    state = yearKeys[i].split("-")[1]
                    console.log(state)
                    o["Year"] = year
                    details = obj[yearKey]
                    causeKeys = Object.keys(details)
                    for(var x=0; x<causeKeys.length; x++){
                        cause=causeKeys[x]
                        o[cause] = details[cause]
                        if (details[cause] > maxPercent){
                            maxPercent = details[cause]
                        }
                        if (allKeys.indexOf(cause) ==-1){
                            allKeys.push(cause)
                        }
                    }
                    if (Object.keys(res).indexOf(state) == -1){
                      res[state] = [o]
                    }else{
                      res[state].push(o)
                    }
                }
                console.log('******')
                console.log(res["Florida"])
                return [allKeys, res, maxPercent]
            }
​
            var z = d3.scaleOrdinal(d3["schemeAccent"])
​
            function build_chart(file_name, id_name){
                d3.csv(file_name).then(function(allData){
                    restructured = restructure_data(allData)
                    keys = restructured[0]
                    results = restructured[1]
                    maxPercent = restructured[2]
                    vals = JSON.stringify(results)
                    console.log(vals)
​
                    allData = JSON.parse(vals);
​
                    for (x in Object.keys(allData)){
                      state = Object.keys(allData)[x]
                      data = allData[state]
                      x = (parseInt(x)+1).toString()
                      console.log("#chart"+x)
                      var svg = d3.select('#chart'+x),
                        margin = { top: 20, right: 80, bottom: 30, left: 40 },
                        width = +svg.attr("width") - margin.left - margin.right,
                        height = +svg.attr("height") - margin.top - margin.bottom,
                        g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")")
​
                    var x0 = d3.scaleBand()
                    .rangeRound([0, width])
                    .paddingInner(0.1);
​
                    var x1 = d3.scaleBand()
                    .padding(0.05);
​
                    var y = d3.scaleLinear()
                    .rangeRound([height, 0]);
​
                    
​
                    x0.domain(data.map(function (d) { return d.Year; }));
                    x1.domain(keys).rangeRound([0, x0.bandwidth()]);
                    y.domain([0, maxPercent+1]).nice();
​
                    g.append("g")
                            .selectAll("g")
                        .data(data)
                            .enter().append("g")
                            .attr("transform", function (d) { return "translate(" + x0(d.Year) + ",0)"; })
                            .selectAll("rect")
                            .data(function (d) {return keys.map(function (key) { return { key: key, value: d[key] }; }).sort(function(a, b) { return b.value - a.value; })})
                            .enter().append("rect")
                            .attr("x", function (d,i) { return x1(d.key); })
                            .attr("y", function (d) { return y(d.value); })
                            .attr("width", x1.bandwidth())
                            .attr("height", function (d) { return height - y(d.value); })
                            .attr("fill", function (d) { return z(d.key); });
​
                    g.append("g")
                        .attr("class", "axis")
                        .attr("transform", "translate(0," + height + ")")
                        .call(d3.axisBottom(x0));
​
                    g.append("g")
                            .attr("class", "axis")
                            .call(d3.axisLeft(y).ticks(null, "s"))
                        .append("text")
                            .attr("x", 2)
                            .attr("y", y(y.ticks().pop()) + 0.5)
                            .attr("dy", "0.32em")
                            .attr("fill", "#000")
                            .attr("font-weight", "bold")
                            .attr("text-anchor", "start")
                            .text("Death Percentage");
​
                    var legend = g.append("g")
                        .attr("font-family", "sans-serif")
                        .attr("font-size", 10)
                        .attr("text-anchor", "end")
                        .selectAll("g")
                        .data(keys.slice().reverse())
                        .enter().append("g")
                        .attr("transform", function (d, i) { return "translate(80," + i * 20 + ")"; });
​
                    legend.append("rect")
                        .attr("x", width - 19)
                        .attr("width", 19)
                        .attr("height", 19)
                        .attr("fill", z);
​
                    legend.append("text")
                        .attr("x", width - 24)
                        .attr("y", 9.5)
                        .attr("dy", "0.32em")
                        .text(function (d) { return d; });
                    }
                    
                });
            }
​
            build_chart('ALFL.csv', '#chart')
        </script>
    </body>
</html>
    