diff --git a/d3.js b/d3.js
index 56189922..31cfe781 100644
--- a/d3.js
+++ b/d3.js
@@ -8625,61 +8625,25 @@
       g.each(function() {
         var g = d3.select(this);
         var scale0 = this.__chart__ || scale, scale1 = this.__chart__ = scale.copy();
-        var ticks = tickValues == null ? scale1.ticks ? scale1.ticks.apply(scale1, tickArguments_) : scale1.domain() : tickValues, tickFormat = tickFormat_ == null ? scale1.tickFormat ? scale1.tickFormat.apply(scale1, tickArguments_) : d3_identity : tickFormat_, tick = g.selectAll(".tick").data(ticks, scale1), tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick").style("opacity", ε), tickExit = d3.transition(tick.exit()).style("opacity", ε).remove(), tickUpdate = d3.transition(tick.order()).style("opacity", 1), tickTransform;
+        var ticks = tickValues == null ? scale1.ticks ? scale1.ticks.apply(scale1, tickArguments_) : scale1.domain() : tickValues, tickFormat = tickFormat_ == null ? scale1.tickFormat ? scale1.tickFormat.apply(scale1, tickArguments_) : d3_identity : tickFormat_, tick = g.selectAll(".tick").data(ticks, scale1), tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick").style("opacity", ε), tickExit = d3.transition(tick.exit()).style("opacity", ε).remove(), tickUpdate = d3.transition(tick.order()).style("opacity", 1), tickSpacing = Math.max(innerTickSize, 0) + tickPadding, tickTransform;
         var range = d3_scaleRange(scale1), path = g.selectAll(".domain").data([ 0 ]), pathUpdate = (path.enter().append("path").attr("class", "domain"), 
         d3.transition(path));
         tickEnter.append("line");
         tickEnter.append("text");
-        var lineEnter = tickEnter.select("line"), lineUpdate = tickUpdate.select("line"), text = tick.select("text").text(tickFormat), textEnter = tickEnter.select("text"), textUpdate = tickUpdate.select("text");
-        switch (orient) {
-         case "bottom":
-          {
-            tickTransform = d3_svg_axisX;
-            lineEnter.attr("y2", innerTickSize);
-            textEnter.attr("y", Math.max(innerTickSize, 0) + tickPadding);
-            lineUpdate.attr("x2", 0).attr("y2", innerTickSize);
-            textUpdate.attr("x", 0).attr("y", Math.max(innerTickSize, 0) + tickPadding);
-            text.attr("dy", ".71em").style("text-anchor", "middle");
-            pathUpdate.attr("d", "M" + range[0] + "," + outerTickSize + "V0H" + range[1] + "V" + outerTickSize);
-            break;
-          }
-
-         case "top":
-          {
-            tickTransform = d3_svg_axisX;
-            lineEnter.attr("y2", -innerTickSize);
-            textEnter.attr("y", -(Math.max(innerTickSize, 0) + tickPadding));
-            lineUpdate.attr("x2", 0).attr("y2", -innerTickSize);
-            textUpdate.attr("x", 0).attr("y", -(Math.max(innerTickSize, 0) + tickPadding));
-            text.attr("dy", "0em").style("text-anchor", "middle");
-            pathUpdate.attr("d", "M" + range[0] + "," + -outerTickSize + "V0H" + range[1] + "V" + -outerTickSize);
-            break;
-          }
-
-         case "left":
-          {
-            tickTransform = d3_svg_axisY;
-            lineEnter.attr("x2", -innerTickSize);
-            textEnter.attr("x", -(Math.max(innerTickSize, 0) + tickPadding));
-            lineUpdate.attr("x2", -innerTickSize).attr("y2", 0);
-            textUpdate.attr("x", -(Math.max(innerTickSize, 0) + tickPadding)).attr("y", 0);
-            text.attr("dy", ".32em").style("text-anchor", "end");
-            pathUpdate.attr("d", "M" + -outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + -outerTickSize);
-            break;
-          }
-
-         case "right":
-          {
-            tickTransform = d3_svg_axisY;
-            lineEnter.attr("x2", innerTickSize);
-            textEnter.attr("x", Math.max(innerTickSize, 0) + tickPadding);
-            lineUpdate.attr("x2", innerTickSize).attr("y2", 0);
-            textUpdate.attr("x", Math.max(innerTickSize, 0) + tickPadding).attr("y", 0);
-            text.attr("dy", ".32em").style("text-anchor", "start");
-            pathUpdate.attr("d", "M" + outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + outerTickSize);
-            break;
-          }
+        var lineEnter = tickEnter.select("line"), lineUpdate = tickUpdate.select("line"), text = tick.select("text").text(tickFormat), textEnter = tickEnter.select("text"), textUpdate = tickUpdate.select("text"), sign = orient === "top" || orient === "left" ? -1 : 1, x1, x2, y1, y2;
+        if (orient === "bottom" || orient === "top") {
+          tickTransform = d3_svg_axisX, x1 = "x", y1 = "y", x2 = "x2", y2 = "y2";
+          text.attr("dy", sign < 0 ? "0em" : ".71em").style("text-anchor", "middle");
+          pathUpdate.attr("d", "M" + range[0] + "," + sign * outerTickSize + "V0H" + range[1] + "V" + sign * outerTickSize);
+        } else {
+          tickTransform = d3_svg_axisY, x1 = "y", y1 = "x", x2 = "y2", y2 = "x2";
+          text.attr("dy", ".32em").style("text-anchor", sign < 0 ? "end" : "start");
+          pathUpdate.attr("d", "M" + sign * outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + sign * outerTickSize);
         }
+        lineEnter.attr(y2, sign * innerTickSize);
+        textEnter.attr(y1, sign * tickSpacing);
+        lineUpdate.attr(x2, 0).attr(y2, sign * innerTickSize);
+        textUpdate.attr(x1, 0).attr(y1, sign * tickSpacing);
         if (scale1.rangeBand) {
           var x = scale1, dx = x.rangeBand() / 2;
           scale0 = scale1 = function(d) {
diff --git a/d3.min.js b/d3.min.js
index 803c75df..313350a7 100644
--- a/d3.min.js
+++ b/d3.min.js
@@ -1,5 +1,5 @@
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Date("2000-01-01T00:00:00.000Z")?Yo:Fl,Yo.parse=function(n){var t=new Date(n);return isNaN(t)?null:t},Yo.toString=Fl.toString,ec.second=jt(function(n){return new rc(1e3*Math.floor(n/1e3))},function(n,t){n.setTime(n.getTime()+1e3*Math.floor(t))},function(n){return n.getSeconds()}),ec.seconds=ec.second.range,ec.seconds.utc=ec.second.utc.range,ec.minute=jt(function(n){return new rc(6e4*Math.floor(n/6e4))},function(n,t){n.setTime(n.getTime()+6e4*Math.floor(t))},function(n){return n.getMinutes()}),ec.minutes=ec.minute.range,ec.minutes.utc=ec.minute.utc.range,ec.hour=jt(function(n){var t=n.getTimezoneOffset()/60;return new rc(36e5*(Math.floor(n/36e5-t)+t))},function(n,t){n.setTime(n.getTime()+36e5*Math.floor(t))},function(n){return n.getHours()}),ec.hours=ec.hour.range,ec.hours.utc=ec.hour.utc.range,ec.month=jt(function(n){return n=ec.day(n),n.setDate(1),n},function(n,t){n.setMonth(n.getMonth()+t)},function(n){return n.getMonth()}),ec.months=ec.month.range,ec.months.utc=ec.month.utc.range;var Hl=[1e3,5e3,15e3,3e4,6e4,3e5,9e5,18e5,36e5,108e5,216e5,432e5,864e5,1728e5,6048e5,2592e6,7776e6,31536e6],Ol=[[ec.second,1],[ec.second,5],[ec.second,15],[ec.second,30],[ec.minute,1],[ec.minute,5],[ec.minute,15],[ec.minute,30],[ec.hour,1],[ec.hour,3],[ec.hour,6],[ec.hour,12],[ec.day,1],[ec.day,2],[ec.week,1],[ec.month,1],[ec.month,3],[ec.year,1]],Yl=Ul.multi([[".%L",function(n){return n.getMilliseconds()}],[":%S",function(n){return n.getSeconds()}],["%I:%M",function(n){return n.getMinutes()}],["%I %p",function(n){return n.getHours()}],["%a %d",function(n){return n.getDay()&&1!=n.getDate()}],["%b %d",function(n){return 1!=n.getDate()}],["%B",function(n){return n.getMonth()}],["%Y",Ee]]),Il={range:function(n,t,e){return $o.range(Math.ceil(n/e)*e,+t,e).map(Zo)},floor:kt,ceil:kt};Ol.year=ec.year,ec.scale=function(){return Io($o.scale.linear(),Ol,Yl)};var Zl=Ol.map(function(n){return[n[0].utc,n[1]]}),Vl=jl.multi([[".%L",function(n){return n.getUTCMilliseconds()}],[":%S",function(n){return n.getUTCSeconds()}],["%I:%M",function(n){return n.getUTCMinutes()}],["%I %p",function(n){return n.getUTCHours()}],["%a %d",function(n){return n.getUTCDay()&&1!=n.getUTCDate()}],["%b %d",function(n){return 1!=n.getUTCDate()}],["%B",function(n){return n.getUTCMonth()}],["%Y",Ee]]);Zl.year=ec.year.utc,ec.scale.utc=function(){return Io($o.scale.linear(),Zl,Vl)},$o.text=Et(function(n){return n.responseText}),$o.json=function(n,t){return At(n,"application/json",Vo,t)},$o.html=function(n,t){return At(n,"text/html",Xo,t)},$o.xml=Et(function(n){return n.responseXML}),"function"==typeof define&&define.amd?define($o):"object"==typeof module&&module.exports&&(module.exports=$o),this.d3=$o}();
\ No newline at end of file
diff --git a/src/svg/axis.js b/src/svg/axis.js
index c6035dd0..150f31cd 100644
--- a/src/svg/axis.js
+++ b/src/svg/axis.js
@@ -31,6 +31,7 @@ d3.svg.axis = function() {
           tickEnter = tick.enter().insert("g", ".domain").attr("class", "tick").style("opacity", ε),
           tickExit = d3.transition(tick.exit()).style("opacity", ε).remove(),
           tickUpdate = d3.transition(tick.order()).style("opacity", 1),
+          tickSpacing = Math.max(innerTickSize, 0) + tickPadding,
           tickTransform;
 
       // Domain.
@@ -45,51 +46,25 @@ d3.svg.axis = function() {
           lineUpdate = tickUpdate.select("line"),
           text = tick.select("text").text(tickFormat),
           textEnter = tickEnter.select("text"),
-          textUpdate = tickUpdate.select("text");
+          textUpdate = tickUpdate.select("text"),
+          sign = orient === "top" || orient === "left" ? -1 : 1,
+          x1, x2, y1, y2;
 
-      switch (orient) {
-        case "bottom": {
-          tickTransform = d3_svg_axisX;
-          lineEnter.attr("y2", innerTickSize);
-          textEnter.attr("y", Math.max(innerTickSize, 0) + tickPadding);
-          lineUpdate.attr("x2", 0).attr("y2", innerTickSize);
-          textUpdate.attr("x", 0).attr("y", Math.max(innerTickSize, 0) + tickPadding);
-          text.attr("dy", ".71em").style("text-anchor", "middle");
-          pathUpdate.attr("d", "M" + range[0] + "," + outerTickSize + "V0H" + range[1] + "V" + outerTickSize);
-          break;
-        }
-        case "top": {
-          tickTransform = d3_svg_axisX;
-          lineEnter.attr("y2", -innerTickSize);
-          textEnter.attr("y", -(Math.max(innerTickSize, 0) + tickPadding));
-          lineUpdate.attr("x2", 0).attr("y2", -innerTickSize);
-          textUpdate.attr("x", 0).attr("y", -(Math.max(innerTickSize, 0) + tickPadding));
-          text.attr("dy", "0em").style("text-anchor", "middle");
-          pathUpdate.attr("d", "M" + range[0] + "," + -outerTickSize + "V0H" + range[1] + "V" + -outerTickSize);
-          break;
-        }
-        case "left": {
-          tickTransform = d3_svg_axisY;
-          lineEnter.attr("x2", -innerTickSize);
-          textEnter.attr("x", -(Math.max(innerTickSize, 0) + tickPadding));
-          lineUpdate.attr("x2", -innerTickSize).attr("y2", 0);
-          textUpdate.attr("x", -(Math.max(innerTickSize, 0) + tickPadding)).attr("y", 0);
-          text.attr("dy", ".32em").style("text-anchor", "end");
-          pathUpdate.attr("d", "M" + -outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + -outerTickSize);
-          break;
-        }
-        case "right": {
-          tickTransform = d3_svg_axisY;
-          lineEnter.attr("x2", innerTickSize);
-          textEnter.attr("x", Math.max(innerTickSize, 0) + tickPadding);
-          lineUpdate.attr("x2", innerTickSize).attr("y2", 0);
-          textUpdate.attr("x", Math.max(innerTickSize, 0) + tickPadding).attr("y", 0);
-          text.attr("dy", ".32em").style("text-anchor", "start");
-          pathUpdate.attr("d", "M" + outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + outerTickSize);
-          break;
-        }
+      if (orient === "bottom" || orient === "top") {
+        tickTransform = d3_svg_axisX, x1 = "x", y1 = "y", x2 = "x2", y2 = "y2";
+        text.attr("dy", sign < 0 ? "0em" : ".71em").style("text-anchor", "middle");
+        pathUpdate.attr("d", "M" + range[0] + "," + sign * outerTickSize + "V0H" + range[1] + "V" + sign * outerTickSize);
+      } else {
+        tickTransform = d3_svg_axisY, x1 = "y", y1 = "x", x2 = "y2", y2 = "x2";
+        text.attr("dy", ".32em").style("text-anchor", sign < 0 ? "end" : "start");
+        pathUpdate.attr("d", "M" + sign * outerTickSize + "," + range[0] + "H0V" + range[1] + "H" + sign * outerTickSize);
       }
 
+      lineEnter.attr(y2, sign * innerTickSize);
+      textEnter.attr(y1, sign * tickSpacing);
+      lineUpdate.attr(x2, 0).attr(y2, sign * innerTickSize);
+      textUpdate.attr(x1, 0).attr(y1, sign * tickSpacing);
+
       // If either the new or old scale is ordinal,
       // entering ticks are undefined in the old scale,
       // and so can fade-in in the new scale’s position.