D3 Examples - Reusable Bar Chart

xxxxxxxxxx
 
<!DOCTYPE html>
<body>
    <script src="//d3js.org/d3.v5.min.js"></script>
    <script src="barChart.js"></script>
    <div id="example"></div>
    <script>
        d3.csv('data.csv').then(function(data) {
            data.forEach(d => {
                d.date = new Date(d.date);
                d.price = +d.price;
            })
            var nest = d3.nest()
                .key(d => d.date.getFullYear())
                .rollup(d => d3.sum(d, v => v.price))
                .entries(data);
​
            var chart = barChart()
                .x('key').y('value')
                .title('Chart 1');
                
            d3.select('#example')
                .datum(nest)
                .call(chart);
            console.log(nest)
        })
    </script>
</body>
    