stock data (area)

forked from areologist's block: stock data (line)

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg {
      border: 1px solid gray;
    }
  </style>
</head>

<body>
  <script>
    const margin = { top: 20, right: 20, bottom: 40, left: 40, };
    const fullWidth = 580;
    const fullHeight = 420;
    const width = fullWidth - margin.right - margin.left;
    const height = fullHeight - margin.top - margin.bottom;

const svg = d3.select("body")
    	.append("svg")
      .attr("width", fullWidth)
      .attr("height", fullHeight)
    	.append('g')
    	.attr('transform', `translate(${margin.left}, ${margin.top})`);

const parseTime = d3.timeParse('%Y/%m/%d');
    let yScale, xScale;

d3.json('data.json', (err, data) => {

data.forEach(ticker => {
        ticker.values.forEach(d => {
          d.date = parseTime(d.date);
          d.close = parseFloat(d.close);
        })
      });

setup(data);
    });

function setup(data) {
      const xExtent = [
        d3.min(data, d => d3.min(d.values, v => v.date)),
        d3.max(data, d => d3.max(d.values, v => v.date))
      ];
      xScale = d3.scaleTime()
      	.domain(xExtent)
      	.range([0, width]);

const yExtent = [
        d3.min(data, d => d3.min(d.values, v => v.close)),
        d3.max(data, d => d3.max(d.values, v => v.close))
      ];
      yScale = d3.scaleLinear()
      	.domain(yExtent)
      	.range([height, 0]);

const xAxis = d3.axisBottom(xScale)
      	.ticks(4);
      const yAxis = d3.axisLeft(yScale);

svg.append('g')
	      .attr('transform', `translate(0, ${height})`)
      	.call(xAxis);

svg.append('g')
      	.call(yAxis);

update(data);
    }

function update(data) {
      const area = d3.area()
      	.x(d => xScale(d.date))
      	.y0(yScale(yScale.domain()[0]))
      	.y1(d => yScale(d.close))
      	.curve(d3.curveCatmullRom);

const colors = ['orange', 'steelblue'];

svg.selectAll('.area')
      	.data(data)
      	.enter()
      	.append('path')
      	.attr('d', d => area(d.values))
      	.attr('class', 'area')
      	.style('stroke', (d, i) => colors[i])
      	.style('stroke-width', 2)
      	.style('fill', (d, i) => colors[i])
      	.style('fill-opacity', 0.7);
    }
  </script>
</body>

https://d3js.org/d3.v4.min.js