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 div.bar {
    display: inline-block;
    width: 40px;
    height: 75px;
    /* background-color: teal; */
    background-color: blue;
 }

 /* var dataset = [ 9, 1, 4, 1, 5, 9 ]; */
 const dataset = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

 d3.select("body")
    .selectAll("div")
    .data(dataset)
    .enter()
    .append("div")
    .attr("class", "bar")
    .style("height", function(d) {
       var barHeight = d * 10
       return barHeight + "px"
    })

d3.select("#graph").graphviz()
    .fade(false)
    .renderDot(
    'digraph  {\
    a -> b -> c\
    }'
    )

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