From: Samuel Jo <samueljo@users.noreply.github.com>
Date: Tue, 21 Mar 2017 00:40:28 +0000 (-0400)
Subject: Do not draw tooltips that have no items (#4034)
X-Git-Tag: v2.6.0~2^2~39
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8367f90df0ce765d096c3175b44ffa31d677a14e;p=thirdparty%2FChart.js.git

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

diff --git a/src/core/core.tooltip.js b/src/core/core.tooltip.js
index 16fcb099b..15574a827 100755
--- 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);