var demo = d3.select('.d3Display')
var data = [];
function draw() {
  ...
  let x = d3.scaleLinear()...
  d3.select(".chart").selectAll("div").remove();
  d3.select(".chart")
  .selectAll("div")
    .data(data)
  .enter().append("div")
    .style(...)
    .text(function(d) { return d; });
}