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Last active April 16, 2023 06:17
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SVG Semantic Zooming
license: gpl-3.0
<!DOCTYPE html>
<meta charset="utf-8">
<svg width="960" height="500"></svg>
<script src=""></script>
var svg ="svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var randomX = d3.randomNormal(width / 2, 80),
randomY = d3.randomNormal(height / 2, 80),
data = d3.range(2000).map(function() { return [randomX(), randomY()]; });
var circle = svg.selectAll("circle")
.attr("r", 2.5)
.attr("transform", transform(d3.zoomIdentity));
.attr("fill", "none")
.attr("pointer-events", "all")
.attr("width", width)
.attr("height", height)
.scaleExtent([1, 8])
.on("zoom", zoom));
function zoom() {
circle.attr("transform", transform(d3.event.transform));
function transform(t) {
return function(d) {
return "translate(" + t.apply(d) + ")";
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Are there any relevant changes one needs to do in order to migrate this code to v4?

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