From 6222a8983c6b3cab90e78b9c48622219e9adc8c6 Mon Sep 17 00:00:00 2001
From: Fei <fei-fei.zheng@ibm.com>
Date: Wed, 24 Jun 2020 17:48:10 -0400
Subject: [PATCH] style: add semicolons and revert code

---
 packages/core/src/model.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/model.ts b/packages/core/src/model.ts
index 3148ee91c1..ff324b06d7 100644
--- a/packages/core/src/model.ts
+++ b/packages/core/src/model.ts
@@ -169,7 +169,11 @@ export class ChartModel {
 
 		// Sort keys
 		if (scaleType === ScaleTypes.TIME) {
-			stackKeys.sort((a, b) => new Date(a) - new Date(b));
+			stackKeys.sort((a: any, b: any) => {
+				const dateA: any = new Date(a);
+				const dateB: any = new Date(b);
+				return dateA - dateB;
+			});
 		} else if (
 			scaleType === ScaleTypes.LOG ||
 			scaleType === ScaleTypes.LINEAR