Line Chart D3 v4

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
   svg {
    width: 100%;
    height: 100%;
    position: center;
    }

body {
   background-color: lightgrey;
    }

.line:hover{
      fill: none;
        stroke-width: 5;
    }
    
    .axis--x path {
      fill: none;
     display: yellow;
    } 
  </style>
</head>

<body>
  <svg width="960" height="500"></svg>
  <script>
var margin = {top: 30, right: 60, bottom: 50, left: 60};
var width = 960 - margin.left - margin.right;
var height = 500 - margin.top - margin.bottom;
var parseTime = d3.timeParse("%b-%y");
var color = d3.scaleOrdinal(d3.schemeCategory10);

var g = d3.select("svg")
        .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var xRange = d3.scaleTime()
        .rangeRound([0, width]);

var yRange = d3.scaleLinear()
    .range([height, 0]);

var line = d3.line()
    .x(function(d) { return xRange(d.Date);  })
    .y(function(d) { return yRange(d.market_share);  })
    .curve(d3.curveMonotoneX);

d3.csv("browser_statistics.csv",function(d, i, columns) {
    d.Date = parseTime(d.Date);
    for (var i = 1, n = columns.length, c; i < n; ++i) d[c = columns[i]] = +d[c];
    return d;
    },
    function(error,data){
    if (error) throw error;
    var browsers = data.columns.slice(1).map(function(id) {
    return {
      id: id,
      values: data.map(function(d) {
      return {Date: d.Date, market_share: d[id]};
      })
    };     
  });

xRange.domain(d3.extent(data, function(d) { return d.Date; }));

yRange.domain([
    d3.min(browsers, function(c) { return d3.min(c.values, function(d) { return d.market_share; }); }),
    d3.max(browsers, function(c) { return d3.max(c.values, function(d) { return d.market_share; }); })
  ]);

color.domain(browsers.map(function(c) { return c.id; }));

g.append("g")
      .attr("class", "axis")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(xRange))
      .style("text-anchor", "middle")
      .attr("dx", "-.1em");

g.append("g")
      .attr("class", "axis")
      .call(d3.axisLeft(yRange))
      .append("text")
      .attr("x",2)
      .attr("y", 6)
      .attr("dy", "0.71em")
      .attr("fill", "#000")
      .attr("text-anchor", "start")
      .text("Market Share, %");

var browser = g.selectAll(".browsers")
    .data(browsers)
    .enter()
    .append("g")
    .attr("class", "browser");

browser.append("path")
      .style("fill", "none")
      .attr("class", "line")
      .attr("d", function(d) { return line(d.values); })
      .style("stroke", function(d) { return color(d.id); });
      
  browser.append("text")
      .datum(function(d) { return {id: d.id, value: d.values[0]}; })
      .attr("transform", function(d) { return "translate(" + xRange(d.value.Date) + "," + yRange(d.value.market_share) + ")"; })
      .attr("x", 3)
      .attr("dy", "0.35em")
      .style("font", "10px sans-serif")
      .text(function(d) { return d.id; });

});
    
  </script>
</body>

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