davegotz/index.html

## index.html
<html>
    <body>
        <script src="https://d3js.org/d3.v7.min.js"></script>

        <svg class="chart" height="300" width="500">
        </svg>

        <script>
            // This is the data array which will be represented as a bar chart.
            let data = [4, 8, 15, 16, 23, 42];

            // Define an x and y scale.
            let x = d3.scaleLinear()
              .domain([0, data.length])
              .range([0, 500]);

            let y = d3.scaleLinear()
              .domain([0, d3.max(data)])
              .range([300, 0]);

            // Select the chart svg which will be the container for the new bar chart
            let chart = d3.select(".chart");

            // Define some layout parameters.
            let text_spacing = 4;
            let bar_spacing = 2;
            let bar_width = x(1) - x(0) - bar_spacing;

            // Perform the data join and add the new rectangles
            chart.selectAll("rect")
              .data(data).join("rect")
                .style("fill", "steelblue")
                .attr("x", (d,i) => x(i))
                .attr("y", d => y(d))
                .attr("height", d => 300-y(d))
                .attr("width", bar_width);

            // Perform the data join again, this time to create the text labels to show the data values.
            chart.selectAll("text")
              .data(data).join("text")
                .style("fill", "white")
                .style("font-family", "sans-serif")
                .style("font-size", "16pt")
                .style("text-anchor", "middle")
                .style("dominant-baseline", "hanging")
                .attr("x", (d,i) => x(i) + 0.5*bar_width)
                .attr("y", d => y(d)+text_spacing)
                .text(d => d);

        </script>
    </body>
</html>
	<html>
	<body>
	<script src="https://d3js.org/d3.v7.min.js"></script>

	<svg class="chart" height="300" width="500">
	</svg>

	<script>
	// This is the data array which will be represented as a bar chart.
	let data = [4, 8, 15, 16, 23, 42];

	// Define an x and y scale.
	let x = d3.scaleLinear()
	.domain([0, data.length])
	.range([0, 500]);

	let y = d3.scaleLinear()
	.domain([0, d3.max(data)])
	.range([300, 0]);

	// Select the chart svg which will be the container for the new bar chart
	let chart = d3.select(".chart");

	// Define some layout parameters.
	let text_spacing = 4;
	let bar_spacing = 2;
	let bar_width = x(1) - x(0) - bar_spacing;

	// Perform the data join and add the new rectangles
	chart.selectAll("rect")
	.data(data).join("rect")
	.style("fill", "steelblue")
	.attr("x", (d,i) => x(i))
	.attr("y", d => y(d))
	.attr("height", d => 300-y(d))
	.attr("width", bar_width);

	// Perform the data join again, this time to create the text labels to show the data values.
	chart.selectAll("text")
	.data(data).join("text")
	.style("fill", "white")
	.style("font-family", "sans-serif")
	.style("font-size", "16pt")
	.style("text-anchor", "middle")
	.style("dominant-baseline", "hanging")
	.attr("x", (d,i) => x(i) + 0.5*bar_width)
	.attr("y", d => y(d)+text_spacing)
	.text(d => d);

	</script>
	</body>
	</html>