d3 update example

d3update.html

<p>
  <label for="nValue" 
         style="display: inline-block; width: 240px; text-align: right">
         angle = <span id="nValue-value"></span>
  </label>
  <input type="number" min="0" max="360" step="5" value="0" id="nValue">
</p>


<p>
  <label for="tValue" 
         style="display: inline-block; width: 240px; text-align: right">
         text = <span id="tValue-value"></span>
  </label>
  <input type="text" value="hello" id="tValue">
</p>

d3update.js

var width = 600;
var height = 300;
 
var holder = d3.select("body")
      .append("svg")
      .attr("width", width)    
      .attr("height", height); 

// draw the element
holder.append("text")
  .style("fill", "black")
  .style("font-size", "56px")
  .attr("dy", ".35em")
  .attr("text-anchor", "middle")
  .attr("transform", "translate(300,150) rotate(0)")
  .text("d3noob.org");


function update() {
var updatetext = d3.select('#tValue').property('value'); 
var updaterotation = d3.select('#nValue').property('value');

holder.select("text") 
.text(updatetext)
.attr("transform", "translate(300,150) rotate("+updaterotation+")");  
  
}

d3.selectAll('input').on('input', function() {
    update();
});