Fix #62

wa0x6e · Dec 3, 2013 · 12ebf1f · 12ebf1f
1 parent f6a6abd
commit 12ebf1f
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/cal-heatmap.js b/src/cal-heatmap.js
@@ -581,7 +581,10 @@ var CalHeatMap = function() {
 		self.root = d3.select(self.options.itemSelector).append("svg").attr("class", "cal-heatmap-container");
 
 		self.tooltip = d3.select(self.options.itemSelector)
-			.attr("style", d3.select(self.options.itemSelector).attr("style") + "position:relative;")
+			.attr("style", function() {
+				var current = d3.select(self.options.itemSelector).attr("style");
+				return (current !== null ? current : "") + "position:relative;";
+			})
 			.append("div")
 			.attr("class", "ch-tooltip")
 		;