example/text-nodes/index-2d.html

<head>
  <style> body { margin: 0; } </style>

  <script src="//unpkg.com/react/umd/react.production.min.js"></script>
  <script src="//unpkg.com/react-dom/umd/react-dom.production.min.js"></script>
  <script src="//unpkg.com/@babel/standalone"></script>

  <script src="//unpkg.com/react-force-graph-2d"></script>
  <!--<script src="../../src/packages/react-force-graph-2d/dist/react-force-graph-2d.js"></script>-->
</head>

<body>
  <div id="graph"></div>

  <script type="text/jsx">
    fetch('../datasets/miserables.json').then(res => res.json()).then(data => {
      ReactDOM.render(
        <ForceGraph2D
          graphData={data}
          nodeAutoColorBy="group"
          nodeCanvasObject={(node, ctx, globalScale) => {
            const label = node.id;
            const fontSize = 12/globalScale;
            ctx.font = `${fontSize}px Sans-Serif`;
            const textWidth = ctx.measureText(label).width;
            const bckgDimensions = [textWidth, fontSize].map(n => n + fontSize * 0.2); // some padding

            ctx.fillStyle = 'rgba(255, 255, 255, 0.8)';
            ctx.fillRect(node.x - bckgDimensions[0] / 2, node.y - bckgDimensions[1] / 2, ...bckgDimensions);

            ctx.textAlign = 'center';
            ctx.textBaseline = 'middle';
            ctx.fillStyle = node.color;
            ctx.fillText(label, node.x, node.y);

            node.__bckgDimensions = bckgDimensions; // to re-use in nodePointerAreaPaint
          }}
          nodePointerAreaPaint={(node, color, ctx) => {
            ctx.fillStyle = color;
            const bckgDimensions = node.__bckgDimensions;
            bckgDimensions && ctx.fillRect(node.x - bckgDimensions[0] / 2, node.y - bckgDimensions[1] / 2, ...bckgDimensions);
          }}
        />,
        document.getElementById('graph')
      );
    });
  </script>
</body>