Series of 2016-2017 by genre

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    *{
      font-family: "Helvetica Neue"
    }
    p, text {
      font-size: 0.85em;
      }
    svg {
     // background: #fcfcfc;
    }
  </style>
</head>

<body>
  <button id="decade">Split by year
  2016/2017</button>
  <button id="combine">Combine</button>
  <div id="chart"></div>
  
  <script>
    
    (function() {
      var width = 900,
          height = 700;
      
      var svg = d3.select("#chart")
      	.append("svg")
      	.attr("height", height)
      	.attr("width", width)
      	.append("g")
      	.attr("transform", "translate(0,0)")
      
      var color = d3.scaleLinear()
  .domain(900)
  .range(["#fbb4ae", "#ccebc5", "#9ecae1", "#c6dbef", "#deebf7", "#fbb4ae", "#e5d8bd", "#ffffcc", "#fddaec", "#fed9a6"])
      
      //var div = d3.select("body").append("div")
      //	.attr("class", "tooltip")
      //	.style("opacity", 0)
      
      var tooltip = d3.select("body")
      	.append("div")
      	.style('position', "absolute")
      	.style("z-index", '10')
      	.style("visibility", "hidden")
      	
      
      var radiusScale = d3.scaleSqrt().domain([5.5, 8.9]).range([2, 45])
      
      var forceXSeparate = d3.forceX(function(d) {
        if (d.year == '2016') {
            return 200
            } else {
           return 700 
            }
          }).strength(0.05)
      
      var forceXCombine = d3.forceX(width / 2).strength(0.04)
      
      var forceCollide = d3.forceCollide(function(d) {
        return radiusScale(d.rate) + 0.5 
      })
      
      //simulation forces the circles to go
      //and interact
      var simulation = d3.forceSimulation()
      	.force("x", forceXCombine)
      	.force("y", d3.forceY(height/2).strength(0.04))
      	.force("collide", forceCollide)
      
      d3.queue()
      	.defer(d3.csv, "series.csv")
      	.await(ready)
      
      function ready (error, datapoints) {
        
        var circles = svg.selectAll(".titles")
        	.data(datapoints)
        	.enter().append("circle")
        	.attr("class", "titles")
        	.attr("r", function(d) {
            return radiusScale(d.rate)
          })
        	.attr("fill", function(d) {
            if (d.genre == '(drama)') {
            return "#fbb4ae" } 
            if (d.genre == '(comedy)') {
              return "#ccebc5"  }
            if (d.genre == '(horror)') {
              return "#9ecae1" }
            if (d.genre == '(thriller)') {
              return "#c6dbef" }
            if (d.genre == '(criminal)') {
              return "#deebf7" }
            if (d.genre == '(melodrama)') {
                return "#fbb4ae"}
            if (d.genre == '(biography)') {
                return "#fbb4ae"}
            if (d.genre == '(detective)') {
                return "#e5d8bd"}
            if (d.genre == '(fantasy)') {
                return "#ffffcc"}
            if (d.genre == '(documentary)') {
                return "#fddaec"}
            if (d.genre == '(history)') {
                return "#fddaec"}
            if (d.genre == '(musical)') {
              return "#fed9a6"
            }
            else {
           return "#decbe4"   } 
          })
        	.on('click', function(d) {
            console.log(d)
          })
        	.on('mouseover', function(d) {
          	return tooltip.style("visibility", "visible")
            .html(d.titles)
            		})
        	.on('mousemove', function() {
          	return tooltip.style("top", (event.pageY-10) + "px").style("left", (event.pageX + 10) + "px")
          })
        	.on("mouseout", function() {
            return tooltip.style("visibility", "hidden")
          })
          
        
				
        d3.select('#decade').on('click', function() {
          simulation
          	.force("x", forceXSeparate)
          	.alphaTarget(0.5)
          	.restart()
        })
        
        d3.select('#combine').on('click', function() {
          simulation
          	.force("x", forceXCombine)
          	.alphaTarget(0.5)
          	.restart()
          })
        
        simulation.nodes(datapoints)
        	.on('tick', ticked)
        
        function ticked() {
          circles
          	.attr("cx", function(d) {
            return d.x
          })
          	.attr("cy", function(d) {
            return d.y
          })
   
 }      
      }
    })();
  </script>
</body>

https://d3js.org/d3.v4.min.js