Do not draw tooltips that have no items (chartjs#4034)

exwm · Mar 21, 2017 · f718e16 · f718e16
1 parent 4565991
commit f718e16
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/core/core.tooltip.js b/src/core/core.tooltip.js
@@ -789,7 +789,10 @@ module.exports = function(Chart) {
 			// IE11/Edge does not like very small opacities, so snap to 0
 			var opacity = Math.abs(vm.opacity < 1e-3) ? 0 : vm.opacity;
 
-			if (this._options.enabled) {
+			// Truthy/falsey value for empty tooltip
+			var hasTooltipContent = vm.title.length || vm.beforeBody.length || vm.body.length || vm.afterBody.length || vm.footer.length;
+
+			if (this._options.enabled && hasTooltipContent) {
 				// Draw Background
 				this.drawBackground(pt, vm, ctx, tooltipSize, opacity);