text replacement by denisemauldin

index.html

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)
    
    var g = svg.append('g').attr('class', 'inner-info')

    let data = {
    firstName: "Tender",
    lastName: "Branson"
  }
    
  
  function update(data) {
 
    let infoUpdate = g.selectAll('.primaryText')
                         .data([data], function(d) { return d });

    // EXIT
    infoUpdate.exit().remove();
    
    // UPDATE
     infoUpdate.text(function(d) {
        return d.firstName;
      });
   
    // ENTER
    infoUpdate.enter().append('text')
      .attr('class', 'primaryText')
      .attr('text-anchor', 'middle')
      .attr('x', 50)
      .attr('y', 10)
      .attr('dy', '.5rem')
      .text((d) => {
        return d.firstName;
      });
  }

    update(data);
    
    setTimeout(() => {
        update({firstName: "Denise", lastName: "Mauldin"});
    }, 3000);
  
  </script>
</body>