well json 6

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <script src="wells.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    
    .axis path {
      fill: none;
      stroke: black;
      shape-rendering: crisp;
    }
    
    .axis text {
      font-family: sans-serif;
      font-size: 15px;
    }
    
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var margin = {top: 20, right:20, bottom: 150, left: 62};
    var width = 960 - margin.left - margin.right;
    var height = 500 - margin.top - margin.bottom;
    
    
    var fixDate = function (data) {
      format = d3.time.format("%Y-%m-%d");
      data.sort(function(a,b) { return a.depth - b.depth})
      data.forEach(function(d) {
        if (d.spud_date) {
          d.spud_date = format.parse(d.spud_date);
        }      
      });
    }
    
    fixDate(wells)
    
    
    
    var xExtent = d3.extent(wells, function(well) { return well.spud_date });
    var yExtent = d3.extent(wells, function(well) { return well.depth });
    
    var xScale = d3.time.scale()
    	.range([0, width])
    	.domain(xExtent);
    
    var yScale = d3.scale.linear()
    	.range([height, 0])
    	.domain(yExtent);
    
    var color = d3.scale.category20();
    
    var xAxis = d3.svg.axis()
    	.scale(xScale)
			.orient("bottom");
    
    var yAxis = d3.svg.axis()
    	.scale(yScale)
    	.orient("left");
       
    var svg = d3.select("body").append("svg")
      .attr("width", width + margin.left + margin.right)
      .attr("height", height + margin.top + margin.bottom)
    .append("g")
    	.attr("transform", "translate(" + margin.left +", " + margin.top + ")");
  
    svg.append("g")
    	.attr("class", "axis")
    	.attr("transform", "translate(0," + height + ")")
    	.call(xAxis)
    .append("text")
    	.attr("class", "label")
    	.attr("x", width)
    	.attr("y", -6)
    	.style("text-anchor", "end")
    	.text("Spud Date")

svg.append("g")
    	.attr("class", "axis")
			.call(yAxis)
    .append("text")
    	.attr("class", "label")
    	.attr("transform", "rotate(-90)")
    	.attr("y", 6)
    	.attr("dy", ".71em")
    	.style("text-anchor", "end")
    	.text("Depth (ft)")
    
    svg.selectAll("circle")
    	.data(wells)
    	.enter()
      .append("circle")
    	.attr("class", function(d) { return d.operator; })
    	.attr("cx", function(d, i) { return xScale(d.spud_date); })
    	.attr("cy", function (d) { return yScale(d.depth) })
    	.attr("r", 2)
    	.on("mouseover", function(d) { console.log(d); })
    
    d3.select('svg') // on click request new info from database and transition
    	.on('click', function() {
      	d3.json("https://localhost:3000/api/nd.json", chartTrans)  // get new data from api server
        function chartTrans(newWells) {
          console.log("New Data:", newWells)
          
          fixDate(newWells)
          
          
					svg.selectAll('circle')
          	.data(newWells)
          	.transition()
          	.duration(1000)
						.delay(function(d,i) { return i / 20; })
          	.attr("class", function(d) { return d.operator; })
            .attr("cx", function(d, i) { return xScale(d.spud_date); })
            .attr("cy", function (d) { return yScale(d.depth); })
            .attr("r", function(d) { return d.cum_oil / 40142; })
//           	.style("fill", '#00FF00');
        }
            
    })
    	
  </script>
</body>

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