d3.js indented collapsable tree with search

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
    <title>indented collapsable tree</title>
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/d3@12.10.3/d3.min.js"></script>
    <style type="text/css">

.node rect {
  cursor: pointer;
  fill: #fff;
  fill-opacity: .5;
  stroke: #3182bd;
  stroke-width: 1.5px;
}

.node text {
  font: 10px sans-serif;
  pointer-events: none;
}

path.link {
  fill: none;
  
  stroke: #ff0000;
  stroke-width: 1.5px;

</style>
</head>
<body>
  <div style="overflow:hidden; font-size=11px;">
		<input id="searchField" type="text" name="fname" style="float:left;">
		<input type="button" value="search" onclick="search()" style="float:left; margin-left:5px;">
		<div id="searching" style="float:left; margin-left:20px; margin-top:3px; color:#c9c9b5;width:200px;"></div>
		<div id="clearResult" class="clearResult" onclick="clearResult()">Clear</div>
    
<header>
	
  </header>
    <div id="chart"></div>

var w = 700,
    h = 551000,
    i = 0,
    barHeight = 20,
    barWidth = w * .8,
    duration = 400,
    root;

var tree = d3.layout.tree()
    .size([h, 100]);

var diagonal = d3.svg.diagonal()
    .projection(function(d) { return [d.y, d.x]; });

function collapse(d, index) {
				d.parent = this;
				d.marker = this.marker + generateMarker(index);
			    if (d.children) {
			      d._children = d.children;
			      d._children.forEach(collapse, d);
			      d.children = null;
			    }
			  }

function update(source) {

// Compute the flattened node list. TODO use d3.layout.hierarchy.
  var nodes = tree.nodes(root);
	  
  // Compute the "layout".
  nodes.forEach(function(n, i) {
    n.x = i * barHeight;
  });
  
  // Update the nodes…
  var node = vis.selectAll("g.node")
      .data(nodes, function(d) { return d.id || (d.id = ++i); });
  
  var nodeEnter = node.enter().append("svg:g")
      .attr("class", "node")
      .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
      .style("opacity", 1e-6);

// Enter any new nodes at the parent's previous position.
  nodeEnter.append("svg:rect")
      .attr("y", -barHeight / 2)
      .attr("height", barHeight)
      .attr("width", barWidth)
      .style("fill", color)
      .on("click", click);
  
  nodeEnter.append("svg:text")
      .attr("dy", 3.5)
      .attr("dx", 5.5)
      .text(function(d) { return d.name; });
  
  // Transition nodes to their new position.
nodeEnter.transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })
      .style("opacity", 1);
  
  node.transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })
      .style("opacity", 1)
    .select("rect")
      .style("fill", color);

// Transition exiting nodes to the parent's new position.
  node.exit().transition()
      .duration(duration)
      .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
      .style("opacity", 1e-6)
      .remove();
  
  // Update the links…
  var link = vis.selectAll("path.link")
      .data(tree.links(nodes), function(d) { return d.target.id; });
  
  // Enter any new links at the parent's previous position.
  link.enter().insert("svg:path", "g")
      .attr("class", "link")
      .attr("d", function(d) {
        var o = {x: source.x0, y: source.y0};
        return diagonal({source: o, target: o});
      })
    .transition()
      .duration(duration)
      .attr("d", diagonal);
  
  // Transition links to their new position.
  link.transition()
      .duration(duration)
      .attr("d", diagonal);
  
  // Transition exiting nodes to the parent's new position.
  link.exit().transition()
      .duration(duration)
      .attr("d", function(d) {
        var o = {x: source.x, y: source.y};
        return diagonal({source: o, target: o});
      })
      .remove();
  
  // Stash the old positions for transition.
  nodes.forEach(function(d) {
    d.x0 = d.x;
    d.y0 = d.y;
  });
}

// Toggle children on click.
function click(d) {
  if (d.children) {
    d._children = d.children;
    d.children = null;
  } else {
    d.children = d._children;
    d._children = null;
  }
  update(d);
}

function color(d) {
  return d._children ? "#3182bd" : d.children ? "#c6dbef" : "#fd8d3c";
}

</script>
  </body>
</html>

Modified http://mbostock.github.com/d3/d3.min.js to a secure url

https://mbostock.github.com/d3/d3.min.js