Using .each() for shared computation.
From D3 in Depth book by Peter Cook.
license: gpl-3.0 | |
height: 170 | |
border: no |
Using .each() for shared computation.
From D3 in Depth book by Peter Cook.
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<head> | |
<title>Selection .each</title> | |
</head> | |
<style> | |
body { | |
font-family: "Helvetica Neue", Helvetica, sans-serif; | |
font-size: 14px; | |
color: #333; | |
} | |
circle { | |
fill: #ddd; | |
cursor: pointer; | |
} | |
</style> | |
<body> | |
<svg width="760" height="140"> | |
<g transform="translate(70, 70)"> | |
<circle r="40" /> | |
<circle r="40" cx="120" /> | |
<circle r="40" cx="240" /> | |
<circle r="40" cx="360" /> | |
<circle r="40" cx="480" /> | |
<circle r="40" cx="620" /> | |
</g> | |
</svg> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"></script> | |
<script> | |
d3.selectAll('circle') | |
.each(function(d, i) { | |
var odd = i % 2 === 1; | |
d3.select(this) | |
.style('fill', odd ? 'orange' : '#ddd') | |
.attr('r', odd ? 40 : 20); | |
}); | |
</script> | |
</body> | |
</html> |