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EnExUp: transitions
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license: mit |
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<!DOCTYPE html> | |
<head> | |
<meta charset="utf-8"> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<style> | |
body { | |
margin:0; | |
position:fixed; | |
top:0; | |
right:0; | |
bottom:0; | |
left:0; | |
} | |
.bordered { | |
border: 1px solid black | |
} | |
</style> | |
</head> | |
<body> | |
<svg></svg> | |
<script> | |
let rectWidth = 100; | |
let height = 300; | |
let data = [ | |
[100, 250, 175, 200, 120], | |
[230, 120, 300, 145, 75, 250], | |
[240, 250, 100] | |
] | |
let colors = d3.scaleOrdinal(d3.schemeCategory10); | |
let svg = d3.select('svg') | |
.attr('width', 700) | |
.attr('height', height) | |
.attr('class', 'bordered') | |
let updateBars = (data) => { | |
let t = d3.transition().duration(1000); | |
let bars = svg.selectAll('rect') | |
.data(data, d => d); | |
// exit | |
bars.exit() | |
// .transition(t) | |
.attr('y', height) | |
.attr('height', 0) | |
.remove(); | |
// enter | |
let enter = bars.enter().append('rect') | |
.attr('width', rectWidth) | |
.attr('stroke', '#fff') | |
.attr('y', height) | |
// enter + update | |
bars = enter.merge(bars) | |
.attr('fill', d => colors(d)) | |
.attr('x', (d, i) => i * rectWidth) | |
.transition(t) | |
.attr('y', d => height - d) | |
.attr('height', d => d) | |
} | |
let index = 0; | |
setInterval(() => { | |
updateBars(data[index % 3]); | |
++index | |
}, 2500) | |
</script> | |
</body> |
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