HTML input and multiple d3.js objects

## readme.md

      
        

          Raw
        
        
          
            
          
          
            
              readme.md
            
          
        
      
    
  
    This is an example of implimenting an HTML input using a <range> input tag and using that to adjust multiple d3.js svg elements (spinning text!).
It is used as an example and described in the book D3 Tips and Tricks.

  

  

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<title>Input test</title>

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

<script src="http://d3js.org/d3.v3.min.js"></script>
<script>

var width = 600;
var height = 300;

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

// draw d3.js text
holder.append("text")
  .attr("class", "d3js")
  .style("fill", "black")
  .style("font-size", "56px")
  .attr("dy", ".35em")
  .attr("text-anchor", "middle")
  .attr("transform", "translate(300,55) rotate(0)")
  .text("d3.js");

// draw d3noob.org text
holder.append("text")
  .attr("class", "d3noob")
  .style("fill", "black")
  .style("font-size", "56px")
  .attr("dy", ".35em")
  .attr("text-anchor", "middle")
  .attr("transform", "translate(300,130) rotate(0)")
  .text("d3noob.org");

// when the input range changes update the rectangle
d3.select("#nAngle").on("input", function() {
  update(+this.value);
});

// Initial starting height of the rectangle
update(0);

// update the elements
function update(nAngle) {

// adjust the range text
  d3.select("#nAngle-value").text(nAngle);
  d3.select("#nAngle").property("value", nAngle);

  // adjust d3.js text
  holder.select("text.d3js")
    .attr("transform", "translate(300,55) rotate("+nAngle+")");

  // adjust d3noob.org text
  holder.select("text.d3noob")
    .attr("transform", "translate(300,130) rotate("+(360 - nAngle)+")");
}

</script>

## thumbnail.png

      
        

          Raw
        
        
          
            
          
          
            
              thumbnail.png