d3article1.2

function draw(data) {
  const margin = { top: 20, right: 20, bottom: 50, left: 50 };
  const width = 920 - margin.left - margin.right;
  const height = 390 - margin.top - margin.bottom;

  const x = d3.scaleTime()
    .range([0, width]);

  const y = d3.scaleLinear()
    .range([height, 0]);

  const colorScale = d3.scaleOrdinal(d3.schemeCategory20);

  const svg = d3.select('.chart')
    .append('svg')
    .attr('width', width + margin.left + margin.right)
    .attr('height', height + margin.top + margin.bottom)
    .append('g')
    .attr('transform', `translate(${ margin.left },${ margin.top })`);