examples/d3_hierarchy.html from spritejs/spritejs

examples/d3_hierarchy.html
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Quick Start</title>
  <script src="/js/spritejs.js"></script>
  <script src="//lib.baomitu.com/d3/4.10.2/d3.js"></script>
  <style>
    html,body {
      margin: 0;
      padding: 0;
      background: #201e1e;
      height: 100%;
      width: 100%;
      max-width: 800px;
    }

    #stage {
      display: inline-block;
      width: 100%;
      height: 0;
      padding-bottom: 100%;
      background: #201e1e;
    }  
  </style>
</head>
<body>
  <div id="stage"></div>
  <script>
    /* globals d3 */
    const {Scene} = spritejs;
    const container = document.getElementById('stage');
    const scene = new Scene({
      container,
      width: 1600,
      height: 1200,
      mode: 'stickyWidth',
    });

    const layer = d3.select(scene.layer('fglayer'));

    document.querySelector('#stage canvas').style.backgroundColor = '#151718';

    layer.append('label')
      .attr('pos', [1100, 150])
      .attr('name', 'region')
      .attr('font', '42px Arial')
      .attr('text', '中国')
      .attr('fillColor', '#fff');

    d3.json('https://s5.ssl.qhres2.com/static/b0695e2dd30daa64.json', (err, data) => {
      if(err) throw new Error(err);

      const root = d3.hierarchy(data)
        .sum(d => 1)
        .sort((a, b) => b.value - a.value);

      const pack = d3.pack()
        .size([1000, 1000])
        .padding(3);

      const nodes = pack(root);

      const color = d3.scaleSequential(d3.interpolateMagma)
        .domain([-4, 4]);

      layer.selectAll('label[name!="region"]')
        .data(nodes.descendants())
        .enter()
        .append('label')
        .attr('translate', [300, 150])
        .attr('anchor', 0.5)
        .attr('pos', (d) => {
          const x = Math.round(d.x),
            y = Math.round(d.y);

          return [x, y];
        })
        .attr('size', (d) => {
          const r = Math.round(d.r);
          return [2 * r, 2 * r];
        })
        .attr('bgcolor', d => color(d.depth))
        .attr('borderRadius', (d) => {
          return d.r;
        })
        .attr('font', (d) => {
          return `${16 + Math.round(10 * Math.log2(d.value))}px Arial`;
        })
        .attr('lineHeight', (d) => {
          return Math.round(2 * d.r);
        })
        .attr('textAlign', 'center')
        .attr('text', (d) => {
          if(!d.children) return d.data.name;
          return '';
        })
        .on('mousemove', function (d) {
          // console.log(d.data.name)
          layer.selectAll('label[name="region"]')
            .attr('text', d.data.name);
          layer.selectAll('label[name!="region"]')
            .attr('border', null);
          this.attr('border', [3, 'red']);
        })
        .on('mouseleave', function (d) {
          this.attr('border', null);
        });
    });
  </script>
</body>
</html>