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@tomgp
Created September 22, 2014 14:36
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Different style for origin tick

D3 axes: Sometimes you want one or more of your tick lines to look different depending on their value...

<html>
<head>
<title>scale with different styled origin</title>
<style>
svg{
font-family: sans-serif;
}
line {
stroke: #eee;
stroke-width:3;
stroke-dasharray:3, 3;
shape-rendering: crispEdges;
}
.origin line{
stroke: #333;
}
.domain{
fill:none;
stroke:none;
}
</style>
</head>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<body>
</body>
<script type="text/javascript">
var width = 500, height= 500;
var margin = 50
var scale = d3.scale.linear()
.range([0, height - margin*2])
.domain([-100, 100]);
var svg = d3.select('body').append('svg').attr({
width:width,
height:height
}).append('g').attr('transform','translate('+margin+','+margin+')');
var axis = d3.svg.axis()
.scale(scale)
.orient('left')
.tickSize(-(width - margin*2));
svg.call(axis);
svg.selectAll('.tick')
.classed('origin',function(d,i){
return (d == 0);
});
</script>
</html>
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