You can use a third argument on axis.tickFormat to customise the formatting of the last tick.
There's another example which uses parentNode.nextSibling. Unfortunately, this wasn't working correctly for me across transitions in a React environment.
Last active
July 8, 2018 12:12
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Format last tick across axis transitions
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| license: gpl-3.0 | |
| height: 106 | |
| scrolling: no | |
| border: no |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| margin: 0; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <script> | |
| var margin = { top: 20, right: 15, bottom: 20, left: 10 }, | |
| height = 100 - margin.top - margin.bottom, | |
| width = 960 - margin.left - margin.right; | |
| var x = d3.scaleLinear() | |
| .domain([0, 100]) | |
| .range([0, width]); | |
| var xAxis = d3.axisBottom(x) | |
| .tickFormat(function(d, i, ticks) { | |
| return i !== ticks.length - 1 ? d : d + '%'; | |
| }); | |
| var svg = d3.select('body') | |
| .append('svg') | |
| .attr('width', width + margin.left + margin.right) | |
| .attr('height', height + margin.top + margin.bottom) | |
| .append('g') | |
| .attr('transform', 'translate(' + margin.left + ',' + margin.top + ')'); | |
| svg.append('g') | |
| .attr('class', 'x axis') | |
| .attr('transform', 'translate(' + 0 + ',' + height + ')') | |
| .call(xAxis); | |
| d3.interval(update, 2000); | |
| function update(){ | |
| x.domain([0, d3.randomUniform(1, 100)()]); | |
| svg.select('.x.axis') | |
| .transition() | |
| .duration(500) | |
| .call(xAxis); | |
| } | |
| </script> |
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