<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<script src="//d3js.org/d3.v4.min.js"></script>
<style>
.chart {
background: lightgray;
border: 1px solid black;
}
rect {
fill: steelblue;
}
rect:hover {
fill: turquoise;
}
</style>
<title>D3V4</title>
</head>
<body>
<div class="chart">
</div>
<button onclick="render('math')">Math</button>
<button onclick="render('science')">Science</button>
<button onclick="render('language')">Language</button>
<script type="text/javascript" charset="utf-8">
var margin = {
top: 10,
right: 20,
bottom: 65,
left: 40
};
var width = 400 - margin.left - margin.right;
var height = 600 - margin.top - margin.bottom;
var svg = d3.select('.chart')
.append('svg')
.attr('width', width + margin.left + margin.right)
.attr('height', height + margin.top + margin.bottom)
.call(responsivefy)
.append('g')
.attr('transform', 'translate(' + margin.left + ', ' + margin.top + ')');
var data = [{
name: 'Alice',
math: 37,
science: 62,
language: 54
},
{
name: 'Billy',
math: null,
science: 34,
language: 85
},
{
name: 'Cindy',
math: 86,
science: 48,
language: null
},
{
name: 'David',
math: 44,
science: null,
language: 65
},
{
name: 'Emily',
math: 59,
science: 73,
language: 29
}
];
/**
* Y axis
*/
const yScale = d3.scaleLinear()
.domain([
0, 100
])
.range([height, 0]);
const yAxis = d3.axisLeft(yScale);
svg.call(yAxis);
/**
* x axis
*/
const xScale = d3.scaleBand()
.domain(data.map(d => d.name))
.range([0, width])
.padding(0.2);
const xAxis = d3.axisBottom(xScale).tickSize(10).tickPadding(5);
svg.append('g')
.attr('transform', `translate(0, ${height})`)
.call(xAxis)
.selectAll('text')
.attr('text-anchor', 'end')
.attr('transform', 'rotate(-45)');
// enter: which in the data, but not yet on the page
// upate: which in the data, and also in the page
// exit: which not in the data, but exist on the page
function render(subject = 'math') {
// Define a resuable transation variable
var t = d3.transition().duration(1000);
var update = svg.selectAll('rect')
.data(data.filter(d => d[subject]), d => d.name); //d => d.name is a uniq idientifier
// First: we want to remove the existing object which doesn't have any value
// Get rid of null value object
// Also animation y and height attr to produce
// fade out effect
update
.exit()
.transition(t)
.attr('y', height)
.attr('height', 0)
.remove();
// Second, we want to animate the existing elements height
update
.transition(t)
.delay(1000)
.attr('y', d => yScale(d[subject]))
.attr('height', d => height - yScale(d[subject]));
// Last, for the new data which is not in the page before
// We want to animate
update
.enter()
.append('rect')
.attr('y', height)
.attr('height', 0)
.attr('x', d => xScale(d.name))
.attr('width', d => xScale.bandwidth())
.transition(t)
.delay(update.exit().size() ? 2000: 0) // If page refresh, we don't want to wait 2000ms
.attr('y', d => yScale(d[subject]))
.attr('height', d => height - yScale(d[subject]));
}
render();
function responsivefy(svg) {
// get container + svg aspect ratio
var container = d3.select(svg.node().parentNode),
width = parseInt(svg.style("width")),
height = parseInt(svg.style("height")),
aspect = width / height;
// add viewBox and preserveAspectRatio properties,
// and call resize so that svg resizes on inital page load
svg.attr("viewBox", "0 0 " + width + " " + height)
.attr("preserveAspectRatio", "xMinYMid")
.call(resize);
// to register multiple listeners for same event type,
// you need to add namespace, i.e., 'click.foo'
// necessary if you call invoke this function for multiple svgs
// api docs: https://github.com/mbostock/d3/wiki/Selections#on
d3.select(window).on("resize." + container.attr("id"), resize);
// get width of container and resize svg to fit it
function resize() {
var targetWidth = parseInt(container.style("width"));
svg.attr("width", targetWidth);
svg.attr("height", Math.round(targetWidth / aspect));
}
}
</script>
</body>
</html>
var margin = {
top: 10,
right: 20,
bottom: 65,
left: 40
};
var width = 400 - margin.left - margin.right;
var height = 600 - margin.top - margin.bottom;
var svg = d3.select('.chart')
.append('svg')
.attr('width', width + margin.left + margin.right)
.attr('height', height + margin.top + margin.bottom)
.call(responsivefy)
.append('g')
.attr('transform', 'translate(' + margin.left + ', ' + margin.top + ')');
var data = [{
name: 'Alice',
math: 37,
science: 62,
language: 54
},
{
name: 'Billy',
math: null,
science: 34,
language: 85
},
{
name: 'Cindy',
math: 86,
science: 48,
language: null
},
{
name: 'David',
math: 44,
science: null,
language: 65
},
{
name: 'Emily',
math: 59,
science: 73,
language: 29
}
];
/**
* Y axis
*/
const yScale = d3.scaleLinear()
.domain([
0, 100
])
.range([height, 0]);
const yAxis = d3.axisLeft(yScale);
svg.call(yAxis);
/**
* x axis
*/
const xScale = d3.scaleBand()
.domain(data.map(d => d.name))
.range([0, width])
.padding(0.2);
const xAxis = d3.axisBottom(xScale).tickSize(10).tickPadding(5);
svg.append('g')
.attr('transform', `translate(0, ${height})`)
.call(xAxis)
.selectAll('text')
.attr('text-anchor', 'end')
.attr('transform', 'rotate(-45)');
// enter: which in the data, but not yet on the page
// upate: which in the data, and also in the page
// exit: which not in the data, but exist on the page
function render(subject = 'math') {
// Define a resuable transation variable
var t = d3.transition().duration(1000);
var update = svg.selectAll('rect')
.data(data.filter(d => d[subject]), d => d.name); //d => d.name is a uniq idientifier
// First: we want to remove the existing object which doesn't have any value
// Get rid of null value object
// Also animation y and height attr to produce
// fade out effect
update
.exit()
.transition(t)
.attr('y', height)
.attr('height', 0)
.remove();
// Second, we want to animate the existing elements height
update
.transition(t)
.delay(1000)
.attr('y', d => yScale(d[subject]))
.attr('height', d => height - yScale(d[subject]));
// Last, for the new data which is not in the page before
// We want to animate
update
.enter()
.append('rect')
.attr('y', height)
.attr('height', 0)
.attr('x', d => xScale(d.name))
.attr('width', d => xScale.bandwidth())
.transition(t)
.delay(update.exit().size() ? 2000: 0) // If page refresh, we don't want to wait 2000ms
.attr('y', d => yScale(d[subject]))
.attr('height', d => height - yScale(d[subject]));
}
render();
function responsivefy(svg) {
// get container + svg aspect ratio
var container = d3.select(svg.node().parentNode),
width = parseInt(svg.style("width")),
height = parseInt(svg.style("height")),
aspect = width / height;
// add viewBox and preserveAspectRatio properties,
// and call resize so that svg resizes on inital page load
svg.attr("viewBox", "0 0 " + width + " " + height)
.attr("preserveAspectRatio", "xMinYMid")
.call(resize);
// to register multiple listeners for same event type,
// you need to add namespace, i.e., 'click.foo'
// necessary if you call invoke this function for multiple svgs
// api docs: https://github.com/mbostock/d3/wiki/Selections#on
d3.select(window).on("resize." + container.attr("id"), resize);
// get width of container and resize svg to fit it
function resize() {
var targetWidth = parseInt(container.style("width"));
svg.attr("width", targetWidth);
svg.attr("height", Math.round(targetWidth / aspect));
}
}
/* Styles go here */