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HTML 

              
                
<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="description" content="Quote Machine">
  <meta name="keywords" content="HTML,CSS,XML,JavaScript,JQuery,Bootstrap,Ajax">
  <meta name="author" content="Cesar Gomez">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">

  <link href="https://fonts.googleapis.com/css?family=Noto+Serif+SC:400,600,700" rel="stylesheet"><script src="https://cdn.freecodecamp.org/testable-projects-fcc/v1/bundle.js"></script>

</head>
<body>
  <div class="text-center">
     <h1 id="title">DATA CHART</h1>
  </div>
  <div class="row">
    <div class="col">
            <div id="graph"> </div>
                            <div  class="freeIcon text-center">
        <i class="fab fa-free-code-camp"></i>
      </div>

    </div>
    <div class="col">
      <div class="text-center" id="userTitle">
        <h3>User Stories to Complete</h3>
      </div>
      <ul>
        <li>My chart should have a title with a corresponding id="title"</li>
        <li>My chart should have a g element x-axis with a corresponding id="x-axis".</li>
        <li>My chart should have a g element y-axis with a corresponding id="y-axis"</li>
        <li>Both axes should contain multiple tick labels, each with the corresponding class="tick"</li>
        <li>My chart should have a rect element for each data point with a corresponding class="bar" displaying the data</li>
        <li> Each bar should have the properties data-date and data-gdp containing date and GDP values</li>
        <li>The bar elements' data-date properties should match the order of the provided data</li>
        <li>The bar elements' data-gdp properties should match the order of the provided data</li>
        <li>Each bar element's height should accurately represent the data's corresponding GDP</li>
         <li>The data-date attribute and its corresponding bar element should align with the corresponding value on the x-axis</li>
         <li>The data-gdp attribute and its corresponding bar element should align with the corresponding value on the y-axis</li>
         <li>I can mouse over an area and see a tooltip with a corresponding id="tooltip" which displays more information about the area</li>
        <li>My tooltip should have a data-date property that corresponds to the data-date of the active area</li>
      </ul>


    </div>



</body>
!

CSS 

              
                body{
  background-color: #2f2fa2;
     position:relative;
}

#graph {
  margin-top: 40px;
  text-align:center;
}

#title{
  color: #fff;
  margin-bottom:50px;
  border-bottom: 5px;
}

.bar {
  fill: #f64c72;

}

.active{
  fill:red;
}

div.tooltip {		
    position:absolute;
    text-align: center;			
    width: 60px;					
    height: 48px;					
    padding: 2px;				
    font: 12px sans-serif;		
    background: lightsteelblue;	
    border: 0px;		
    border-radius: 8px;			
    pointer-events: none;
    fill:red;
}
ul {
  color: #fff;
  font-weight:600;
}

li{
  padding: 5px;
}

.freeIcon{
  font-size: 95px;
  color: #fff;
}

#userTitle{
  margin-bottom: 10px;
  color: #99738e;
}
!

JS 

              
                

let value = [];
let dates = []

const width = 700;
const height = 530;



d3.json("https://raw.githubusercontent.com/freeCodeCamp/ProjectReferenceData/master/GDP-data.json").then((data) => {
  let datas = data.data;
  datas.forEach(function(setData){
    dates.push(new Date (setData[0]))
    value.push((setData[1]))
    // value.splice(55, value.length)
  })
console.log(value)

const svg = d3.select("#graph")
                .append("svg")
                .attr("width",width)
                .attr("height", height);

  const sameDate = d3.timeFormat("%Y-%m-%d")	

const xScale = d3.scaleTime()
                  .domain([d3.min(dates), d3.max(dates)])
                  .range([0 , width - 80]);

const x_axis = d3.axisBottom()
                 .scale(xScale)

const yAxis = d3.scaleLinear()
                .domain([0, d3.max(value)])
                .range([height , 0])

const y_axis = d3.axisLeft()
                 .scale(yAxis)

const scaleGross = d3.scaleLinear()
                     .domain([0, d3.max(value)])
                     .range([0, height])

const gdp = value.map(function(item){
  return scaleGross(item)
})


let xAxisTranslate = height - 30;
const yAxisTranslate = 0 - 30;
  
      svg.append("g")
            .attr("transform", "translate(50, " + xAxisTranslate  +")")
            .attr("id","x-axis")
            .call(x_axis)
            .style("color","white")
    
      svg.append("g")
         .attr("transform","translate(50,"+ yAxisTranslate +")")
         .attr("id","y-axis")
         .call(y_axis)
         .style("color","white")
  

  
let div = d3.select("body").append("div")	
            .attr("class", "tooltip")
            .attr("id", "tooltip")
             .style("opacity", 0);
  
      svg.selectAll("rect")
         .data(gdp)
         .enter()
         .append("rect")
         
         .attr("data-date", function(d,i) {
            
            return datas[i][0]
         })
         .attr("data-gdp", function(d,i) {
            return datas[i][1]
         })
         .attr('x', function(d, i) {
           return xScale(dates[i]);
         })

         .attr("y", (d,i) =>{
          return height - d 
         })
          .classed("bar", true)
          .on("mouseover", function(d,i) {
              let coordinates = d3.mouse(this)
              const formYear = d3.timeFormat("%b %Y")
              d3.select(this)
             .classed("active", true)

                div.transition()
                .duration(200)	
                .style("opacity", .9)
                div.attr("data-date", datas[i][0])                 
                .html("Date " + "</br>" + formYear(dates[i]) + "</br>" + "$" + d3.select(this).attr("data-gdp"))	
                .style("left", event.clientX + "px")
                .style("top", (coordinates[1]) + "px")

            })
          .on("mouseout", function(d) {
            d3.select(this)
              .classed("active", false)                   
                div.transition()		
                .duration(100)		
                .style("opacity", 0);
        })
         .attr("width", width/275)
         .attr("height", (d) => {
           return d;
         })
         .attr("transform","translate(51,-30)")

      })
!
999px

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