This animation demonstrates the use of transition.transition and d3.active to create chained transitions. Chained transitions inherit the reference time of the original transition, guaranteeing synchronicity.
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May 3, 2019 07:49
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Chained Transitions
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| circle { | |
| fill: #000; | |
| stroke: #000; | |
| stroke-width: 1.5px; | |
| } | |
| </style> | |
| <svg width="960" height="500"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var svg = d3.select("svg"), | |
| margin = {top: 40, right: 40, bottom: 40, left: 40}, | |
| width = svg.attr("width") - margin.left - margin.right, | |
| height = svg.attr("height") - margin.top - margin.bottom, | |
| g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| var y = d3.scalePoint() | |
| .domain(d3.range(50)) | |
| .range([0, height]); | |
| var z = d3.scaleLinear() | |
| .domain([10, 0]) | |
| .range(["hsl(62,100%,90%)", "hsl(228,30%,20%)"]) | |
| .interpolate(d3.interpolateHcl); | |
| g.selectAll("circle") | |
| .data(y.domain()) | |
| .enter().append("circle") | |
| .attr("r", 25) | |
| .attr("cx", 0) | |
| .attr("cy", y) | |
| .style("fill", function(d) { return z(Math.abs(d % 20 - 10)); }) | |
| .transition() | |
| .duration(2500) | |
| .delay(function(d) { return d * 40; }) | |
| .on("start", function repeat() { | |
| d3.active(this) | |
| .attr("cx", width) | |
| .transition() | |
| .attr("cx", 0) | |
| .transition() | |
| .on("start", repeat); | |
| }); | |
| </script> |
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