KoGor/README.md

## README.md

      
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              README.md
            
          
    SVG "path" element animation with D3.js.
Based on Mike's example: Stroke Dash Interpolation.

  
## index.html
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<head>
  <title>SVG path animation</title>
  <link href="style.css" rel="stylesheet">
  <script src="http://d3js.org/d3.v3.min.js"></script>
  <script src="http://d3js.org/queue.v1.min.js"></script>
</head>
<body>
  <!-- start -->
  <div id="pathAnimation">
    <script src="pathAnimation.js"></script>
  </div>
  <!-- end -->
</body>
</html>

## pathAnimation.js
queue()
.defer(d3.xml, "pathSamples.svg", "image/svg+xml")
.await(ready);

function ready(error, xml) {

  //Adding our svg file to HTML document
  var importedNode = document.importNode(xml.documentElement, true);
  d3.select("#pathAnimation").node().appendChild(importedNode);

  var svg = d3.select("svg"),
  svgWidth = svg.attr("width"),
  svgHeight = svg.attr("height");

  var paths = svg.selectAll("path")
    .call(transition);

  function transition(path) {
    path.transition()
        .duration(7500)
        .attrTween("stroke-dasharray", tweenDash)
        .each("end", function() { d3.select(this).call(transition); }); // infinite loop
  }

  function tweenDash() {
    var l = this.getTotalLength(),
        i = d3.interpolateString("0," + l, l + "," + l); // interpolation of stroke-dasharray attr
    return function(t) {
      return i(t);
    };
  }
}

## pathSamples.svg

      
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              pathSamples.svg
            
          
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## style.css
path {
  fill: none;
  stroke: #000;
  stroke-width: 1px;
}
	<!DOCTYPE html>
	<html lang="en">
	<meta charset="utf-8">
	<head>
	<title>SVG path animation</title>
	<link href="style.css" rel="stylesheet">
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/queue.v1.min.js"></script>
	</head>
	<body>
	<!-- start -->
	<div id="pathAnimation">
	<script src="pathAnimation.js"></script>
	</div>
	<!-- end -->
	</body>
	</html>
	queue()
	.defer(d3.xml, "pathSamples.svg", "image/svg+xml")
	.await(ready);

	function ready(error, xml) {

	//Adding our svg file to HTML document
	var importedNode = document.importNode(xml.documentElement, true);
	d3.select("#pathAnimation").node().appendChild(importedNode);

	var svg = d3.select("svg"),
	svgWidth = svg.attr("width"),
	svgHeight = svg.attr("height");

	var paths = svg.selectAll("path")
	.call(transition);

	function transition(path) {
	path.transition()
	.duration(7500)
	.attrTween("stroke-dasharray", tweenDash)
	.each("end", function() { d3.select(this).call(transition); }); // infinite loop
	}

	function tweenDash() {
	var l = this.getTotalLength(),
	i = d3.interpolateString("0," + l, l + "," + l); // interpolation of stroke-dasharray attr
	return function(t) {
	return i(t);
	};
	}
	}