console 命令行工具 X clear

console

d3.select('#chart')
  .selectAll("div")
  .data([4, 8, 15, 16, 23, 42])
  .enter()
  .append("div")
  .style("height", (d)=> d + "px")

<div id="chart"></div>

#chart div {
  display: inline-block;
  background: #4285F4;
  width: 20px;
  margin-right: 3px;
}