formatting numbers example d3v3

This little tool helps you try out d3.format specifiers on different numbers.

Documentation for format specifiers is here

a friendly fork of the original bl.ock from @zanstrong

this iteration moves the descriptive text to README.md so that the link to the docs is clickable 😄

thanks to guilherme from the d3js slack for suggesting this improvement

<!doctype html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<title>formatting numbers example d3v3</title>
<style>
body {
  margin: 20px 0px 0px 50px;
}

.formattext {
  text-align: right;
}

.formatresult {
  text-align: left;
  padding-left: 40px;
}
</style>
</head>
<body>
  Enter a number:<br>
  <input id='userNum' type='string'><br><br>
  Add your own format specifier (ex: .4n):<br>
  <input id='formatSpecifier' type='string'><br>
	<table style='padding-top: 20px;'>
    <thead>
  	  <tr>
        <th class='formattext'>format specifier</th>
    	  <th class='formatresult'>resulting formatted number</th>
  	  </tr>
  	</thead>
  	<tbody>
    </tbody>
  </table>
<script src='https://d3js.org/d3.v3.min.js' charset='utf-8'></script>
<script src='showFormatsConstructor.js'></script>
<script>
// define variables
var formatlist = ["", "s", ",%", "+,%", ",.1%", ".4r", ".4f", ".4n", ".3n", ",d", ",.0f", ".0f", ".0e", ".1e"];
var userNum = document.getElementById("userNum");
var colorLow = 'blue'
var colorHigh = 'red'

// add listener to call formatter function when user changes the number
userNum.addEventListener("input",
  function(e) {
    myFormats.changeNumber(userNum.value);
  },
  false
);

// need way to update list
formatSpecifier.addEventListener("change",
  function(e) {
    myFormats.addToList(formatSpecifier.value);
  },
  false
);

// create a little color scale function to make the output look pretty
function setColorScale(max) {
  return d3.scale.linear()
    .domain([0, max])
    .interpolate(d3.interpolateRgb)
    .range([colorLow, colorHigh])
}

// construct code/text pairs from list of formats I could use
var constructFormatObject = function(mylist) {
  var types = [];
  mylist.forEach(function(d) {
    types.push({
      code: d3.format(d),
      text: 'd3.format("' + d + '")'
    })
  })
  return types
}

var myFormats = new ShowFormats(
  formatlist,
  0);
</script>
</body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js