An extention of Mike Bostock's Text Transtion I that updates the data attribute instead of using regex on the formatted text.
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February 24, 2017 18:39
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Text Transition Using Datum
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| license: mit |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| h1 { | |
| font: 400 120px/500px "Helvetica Neue"; | |
| text-align: center; | |
| width: 960px; | |
| height: 500px; | |
| margin: 0; | |
| } | |
| </style> | |
| <h1>0</h1> | |
| <script src="//d3js.org/d3.v4.0.0-alpha.23.min.js"></script> | |
| <script> | |
| var format = d3.format(",d"); | |
| d3.select("h1").datum({value: 0}) | |
| var values = d3.range(10).map(function() { | |
| return Math.random() * 1e6; | |
| }) | |
| update(Math.random() * 1e6) | |
| d3.interval(function(){ | |
| var newValue = Math.random() * 1e6 | |
| update(newValue) | |
| }, 3000) | |
| function update(newValue){ | |
| d3.select("h1") | |
| .transition() | |
| .duration(2500) | |
| .on("start", function repeat() { | |
| d3.active(this) | |
| .tween("text", function(d) { | |
| var that = d3.select(this), | |
| i = d3.interpolateNumber(d.value, newValue); | |
| return function(t) { that.text(format(i(t))); }; | |
| }) | |
| }).on("end", function() { | |
| d3.select(this).datum({value: newValue}) | |
| }) | |
| } | |
| </script> |
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