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    <script src=""></script>
       AFRAME.registerComponent('barchart', {
          schema: {
            json: {
              default: {
                key: ['A', 'B', 'C', 'D', 'E'],
                value: [19, 80, 30, 15, 55]
          init: function () {
            var self = this;
            if (typeof === 'string') {
                .then(function(response) {
                  return response.json();
                }).then(function(parsedJson) {
                }).catch(function(ex) {
                  console.log('parsing failed', ex)

          generate: function (parsedJson) {
            var json = parsedJson ||;
            var el = this.el;
            // default alpha for bars
            var alpha = 0.6;
            var data = {return obj.value;});
            var dataText = {return obj.key;});
            // Scale the height of our bars using d3's linear scale
            var hscale = d3.scaleLinear()
              .domain([0, d3.max(data)])
              .range([0, 3]);
            var color = d3.scaleLinear().domain([0, d3.max(data)])
              .interpolate(d3.interpolateHcl).range(['#ffb3ba', '#bae1ff']);

            // Select the current enity object just like an svg
            var currentEntity =;

            // we use d3's enter/update/exit pattern to draw and bind our dom elements
            var bars = currentEntity.selectAll('').data(data);
            // we set attributes on our cubes to determine how they are rendered
            bars.enter().append('a-box').classed('bar', true)
              .attr('position',function (d, i) {
              const x =  i * 0.8 - (data.length / 2);
              const y = hscale(d)/2;
              const z = -3
              return x + " " + y + " " + z   
              .attr('width', function(d) { return 0.5; })
              .attr('depth', function(d) { return 0.5; })
              .attr('height', function(d) { return hscale(d); })
              .attr('opacity', alpha)
              .attr('color', function(d) { return color(d); })
              .on("mouseenter", function(d,i) {
                  .attr('opacity', 0.9);

                  .attr('color', color(d))
                  .attr('align', 'center')
                  .attr('position', `0 ${(hscale(d) / 2 + 0.5)} 0`)
                  .attr('scale', '1 1 1')
                  .attr('value', `${dataText[i]}, ${d}`);
              .on("mouseleave", function(d,i) {
                  .attr('opacity', alpha);

  <body style="background: #111;">
        <img id="groundTexture" src="" crossorigin>
      <a-entity position="-1 2 0" rotation="0 0 0">
        <a-entity camera look-controls wasd-controls>
          <a-entity cursor="fuse: true; fuseTimeout: 500"
                    position="0 0 -2"
                    geometry="primitive: ring; radiusInner: 0.02; radiusOuter: 0.027"
                    material="color: black; shader: flat">
      <a-entity text="font: mozillavr; value: 104 Taiwan Demographics (age, population) ; color: #DADADA; width: 6"
                  position="-2 4 -3"></a-entity>
      <a-entity barchart="json:"></a-entity>
      <a-cylinder id="ground" src="#groundTexture" radius="32" height="0.1"></a-cylinder>