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<div id="header">
<h1>Health and Income of Nations</h1>
</div>
<div id="chart-wrapper">
<canvas id="myChart"></canvas>
</div>
<div id="year-slider-wrapper">
<label>1800</label>
<input id="year-slider" type="range" min="1800" max="2018" style="width: 800px;" value="1800" />
<label>2018</label>
</div>
<div id="footer">
<p>A <a href="https://www.chartjs.org/">Chart.js</a> reproduction of Gapminder's <a href="https://www.gapminder.org/tools/">interactive</a> comparing life expectancy and GDP. Built by <a href="https://createwithdata.com">Peter Cook</a>.</p>
</div>
body {
font-family: Roboto, sans-serif;
color: #333;
}
a {
color: #777;
}
#chart-wrapper {
height: 600px;
}
#header {
text-align: center;
margin: 20px 0;
font-family: Aleo, serif;
}
#year-slider-wrapper {
display: flex;
align-items: center;
justify-content: center;
padding: 20px;
}
#year-slider-wrapper label {
font-size: 24px;
padding: 0 10px;
}
#footer {
margin: 30px;
font-size: 14px;
text-align: center;
color: #aaa;
}
/* http://danielstern.ca/range.css/#/ */
input[type=range] {
-webkit-appearance: none;
width: 100%;
margin: 7.25px 0;
}
input[type=range]:focus {
outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
width: 100%;
height: 5.5px;
cursor: pointer;
box-shadow: 0px 0px 0px #000000, 0px 0px 0px #0d0d0d;
background: rgba(220, 220, 220, 0.78);
border-radius: 3.9px;
border: 0px solid #010101;
}
input[type=range]::-webkit-slider-thumb {
box-shadow: 0px 0px 3.6px #000031, 0px 0px 0px #00004b;
border: 0px solid #b4b4b4;
height: 20px;
width: 20px;
border-radius: 20px;
background: #c8c8c8;
cursor: pointer;
-webkit-appearance: none;
margin-top: -7.25px;
}
input[type=range]:focus::-webkit-slider-runnable-track {
background: rgba(223, 223, 223, 0.78);
}
input[type=range]::-moz-range-track {
width: 100%;
height: 5.5px;
cursor: pointer;
box-shadow: 0px 0px 0px #000000, 0px 0px 0px #0d0d0d;
background: rgba(220, 220, 220, 0.78);
border-radius: 3.9px;
border: 0px solid #010101;
}
input[type=range]::-moz-range-thumb {
box-shadow: 0px 0px 3.6px #000031, 0px 0px 0px #00004b;
border: 0px solid #b4b4b4;
height: 20px;
width: 20px;
border-radius: 20px;
background: #c8c8c8;
cursor: pointer;
}
input[type=range]::-ms-track {
width: 100%;
height: 5.5px;
cursor: pointer;
background: transparent;
border-color: transparent;
color: transparent;
}
input[type=range]::-ms-fill-lower {
background: rgba(217, 217, 217, 0.78);
border: 0px solid #010101;
border-radius: 7.8px;
box-shadow: 0px 0px 0px #000000, 0px 0px 0px #0d0d0d;
}
input[type=range]::-ms-fill-upper {
background: rgba(220, 220, 220, 0.78);
border: 0px solid #010101;
border-radius: 7.8px;
box-shadow: 0px 0px 0px #000000, 0px 0px 0px #0d0d0d;
}
input[type=range]::-ms-thumb {
box-shadow: 0px 0px 3.6px #000031, 0px 0px 0px #00004b;
border: 0px solid #b4b4b4;
height: 20px;
width: 20px;
border-radius: 20px;
background: #c8c8c8;
cursor: pointer;
height: 5.5px;
}
input[type=range]:focus::-ms-fill-lower {
background: rgba(220, 220, 220, 0.78);
}
input[type=range]:focus::-ms-fill-upper {
background: rgba(223, 223, 223, 0.78);
}
var countries, myChart;
var ctx = document.getElementById("myChart").getContext('2d');
var rScale = d3.scaleSqrt().domain([0, 5e8]);
var incomeFormat = d3.format(',');
var regionColor = {
americas: 'rgb(127, 235, 0)',
europe: 'rgb(255, 231, 0)',
africa: 'rgb(0, 213, 233)',
asia: 'rgb(255, 88, 114)'
};
Chart.defaults.global.defaultFontFamily = "'Open Sans', sans-serif";
Chart.defaults.global.defaultFontColor = '#333';
Chart.defaults.global.animation.duration = 0;
var startYear = 1800, endYear = 2018, chosenYear = 1800;
var yearLabelPlugin = {
beforeDraw() {
if(!myChart) return;
myChart.ctx.save();
var geom = myChart.chartArea;
var w = geom.right - geom.left;
var h = geom.bottom - geom.top;
var fontSize = Math.min(w * 0.4, 400);
// Draw background year label
myChart.ctx.textAlign = 'center';
myChart.ctx.textBaseline = 'middle';
myChart.ctx.fillStyle= '#eee';
myChart.ctx.font = fontSize + 'px Aleo';
myChart.ctx.fillText(chosenYear, geom.left + 0.5 * w, geom.top + 0.5 * h);
myChart.ctx.restore();
}
}
function initChart() {
myChart = new Chart(ctx, {
type: 'bubble',
options: {
maintainAspectRatio: false,
legend: {
display: false,
},
scales: {
yAxes: [{
ticks: {
min: 10,
max: 90
},
scaleLabel: {
display: true,
labelString: 'Life expectancy (yrs)',
fontSize: 16,
lineHeight: 2
}
}],
xAxes: [{
type: 'logarithmic',
ticks: {
min: 300,
max: 2e5,
callback: function(value) {
var ticks = [300, 500, 1000, 5000, 10000, 50000, 100000, 200000];
return ticks.indexOf(value) === -1 ? '' : incomeFormat(value);
}
},
scaleLabel: {
display: true,
labelString: 'GDP/capita, PPP$ inflation-adjusted',
fontSize: 16,
lineHeight: 2
}
}]
},
tooltips: {
xPadding: 10,
yPadding: 10,
titleFontSize: 20,
titleMarginBottom: 10,
bodyFontSize: 14,
callbacks: {
title: function(tooltipItem, data) {
var d = data.datasets[tooltipItem[0].datasetIndex];
return d.label;
},
label: function(tooltipItem, data) {
return 'GDP/capita $' + incomeFormat(tooltipItem.xLabel) + ' Life expectancy: ' + tooltipItem.yLabel.toFixed(1) + 'yrs';
}
}
}
},
plugins: [yearLabelPlugin]
});
}
function getDataset() {
var i = chosenYear - startYear;
// Get the data for chosenYear
var data = countries.map(function(d) {
return {
country: d.country,
region: d.region,
gdp: +d.gdp[i],
exp: +d.lifeExpectancy[i],
pop: +d.population[i],
};
});
// Filter out nations w/out data
data = data.filter(function(d) {return d.gdp && d.exp && d.pop;});
// Sort by population size so that small circles are in front
data = _.sortBy(data, function(d) {return -d.pop;});
// Get data array (in structure required by Chart.js)
var points = data.map(function(d) {
return {
x: d.gdp,
y: d.exp,
r: rScale(d.pop)
};
});
// Get color array
var colors = data.map(function(d) {return regionColor[d.region];});
// Get label array
var labels = data.map(function(d) {return d.label;});
// Create dataset
var dataset = {
data: points,
backgroundColor: colors,
borderColor: '#777',
myLabels: labels
};
return dataset;
}
function update() {
if(!countries) return;
var rMax = (myChart.chartArea.bottom - myChart.chartArea.top) / 20;
rScale.range([0, rMax]);
myChart.data = {
datasets: [getDataset()]
};
myChart.update();
}
d3.json('https://s3-us-west-2.amazonaws.com/s.cdpn.io/2814973/gapminder.json')
.then(function(json) {
countries = json;
initChart();
update();
});
document.getElementById('year-slider').addEventListener('input', function(e) {
chosenYear = e.target.value;
update();
});
// Call update on resize to ensure rScale is up to date
window.addEventListener('resize', update);
// Call update when fonts have loaded
WebFont.load({
google: {
families: ['Open Sans', 'Aleo']
},
active: update
});
Also see: Tab Triggers