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HTML

              
                .container
  .tooltip
  .chartContainer
    h3#heading.
      Gross Domestic Product
    svg#chart
    #descriptionText
      #description

              
            
!

CSS

              
                body
  position: relative

#chart text, .axis text, .description  tspan, .tooltip
  fill: #444
  font-size: 12px
  font-weight: 700
  font-family: 'Cutive Mono', monospace
  
.axis .path,
.axis .line,
.domain, line 
  fill: none
  stroke: #444

.tooltip
  opacity: 0
  background: #fff
  box-shadow: 0 0 5px rgba(0,0,0,.1)
  color: #444
  padding: 10px 0
  overflow: hidden
  position: absolute
  width: 160px
  overflow: hidden
  white-space: nowrap
  border-radius: 25px 
  text-align: center
  border: solid 1px #eee
  
.tooltip > span
  display: block

.tooltip > span:first-child
  color: rgb(132, 200, 70)
  font-weight: 700

rect.rect
  stroke: rgba(0,0,0,0)
  
rect.rect:hover
  stroke: #efefef 

.container
  padding: 20px 0
  
#descriptionText, #heading
  color: #444
  font-size: 12px
  font-weight: 700
  font-family: 'Cutive Mono', monospace
  text-align: center

.chartContainer
  text-align: center
  
#heading
  font-size: 20px
  margin: 10px 0

#descriptionText
  padding: 0 10px 
  
body
  margin: 0
              
            
!

JS

              
                
function plot() {
  // JSON url
var url = "https://raw.githubusercontent.com/FreeCodeCamp/ProjectReferenceData/master/GDP-data.json";

// Setting margin
var margin = {top: 30, bottom: 40, left: 70, right:35};

// Assigning width and height to vars for svg
var width = window.innerWidth - margin.right - margin.left;
var height = (window.innerHeight - 140 - margin.bottom - margin.top);

// Scale for y axis
var y = d3.scaleLinear()
        .range([height, 0]);
// Scale for handling data of x-axis
var x = d3.scaleBand()
        .range([0, width]);
// Scale for x axis
var xD = d3.scaleTime()
        .range([0, width]);
// Scale for colors of rect
var helperScale = d3.scaleLinear()
        .range([1, .5])
        .domain([0, height]);
var colorScale = d3.interpolateCool;
// Defining x-axis and y-axis
if(width < 600)
  ticks = 7;
else 
  ticks = 12;
var xaxis = d3.axisBottom(xD)
            .ticks(ticks);
var yaxis = d3.axisLeft(y);

// Setting svg element's height
var chart = d3.select("#chart")
  .attr("width", width + margin.right + margin.left)
  .attr("height", height + margin.bottom + margin.top)
.append("g")
  .attr("transform", "translate(" + margin.left + "," + margin.top + ")" );
// Sending get request
$.getJSON(url, function(data, status) {
  
  // Unsuccesful get request case
  if(status !== "success") {
    alert("Data fetching failed!");
    return;
  }
  
  // Formatting data
  var formattedData = data["data"].map(function(elem) {
    return {x: new Date(elem[0]), y: elem[1]}; 
  });
  
  // Setting Domain
  y.domain([0, d3.max(formattedData.map(function(e){return e.y;}))]);
  x.domain(formattedData.map(function(e){return new Date(e.x)}));
  xD.domain( [ new Date(formattedData[0]["x"]), new Date(formattedData[formattedData.length - 1]["x"]) ]);
  
  // Adding x-axis
    chart.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(0," + height + ")")
      .call(xaxis);
  
  // adding y-axis
  chart.append("g")
    .attr("class", "y axis")
    .call(yaxis)
  .append("text")
    .attr("transform","rotate(-90)")
    .attr("y", "15")
    .attr("class", "yinfo")
    .text("Gross Domestic Product, USA")
  
  var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug',
               'Sep' ,'Oct', 'Nov', 'Dec']; 
  
  // Tooltip object
  var div = d3.select(".tooltip");
  
  // adding rects 
  var bar = chart.selectAll(".rect")
    .data(formattedData)  
    .enter()
  .append("rect")
    .attr("transform", function(d, i) { return "translate(" + x(d.x) + ", 0)"; })
    .attr("class", "rect")
    .attr("y", function(d){ return y(d.y);})
    .attr("height", function(d){ return height - y(d.y);})
    .attr("width", x.step())
    .style("fill", function(d){ return colorScale(helperScale(y(d.y)))})
    .on("mouseover", function(d) {
      div.transition()
        .duration(200)
        .style("opacity", 1);
      div.html('<span class="gdp">'+ d.y + " Billion $" + '</span><span class="date">' + months[d.x.getMonth()] + ", " + (d.x.getFullYear()) + '</span>')
        .style("left", (((- d3.event.pageX + $("body").width()) > $("body").width()/2) ?  d3.event.pageX + 10 : d3.event.pageX - 170 )+ "px")
        .style("top", (d3.event.pageY - 60) + "px");
    })
    .on("mouseout", function(d) {
      div.transition()
        .duration(200)
        .style("opacity", 0);
    });
    addDescription(data.description);
});// getJSON ends

// problems
// x.step() and x.bandwidth()
//why after getJSON axis ranges from 0 to 1
// ticks and tickFormat - scale difference
}

function addDescription(description) {
  $("#description").html(description);
}


$(document).ready(function() {
  plot();
  // for ie 9
  if(window.attachEvent) {
    window.attachEvent('onresize', function() {
        alert('attachEvent - resize');
    });
  } 
  else if(window.addEventListener) {
    window.addEventListener('resize', function() {
      $("#chart").empty();  
      plot();
    }, true);
  }
});
              
            
!
999px

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