From d5ee5a4e45c9995d0052fa11f23f34593e6bb508 Mon Sep 17 00:00:00 2001
From: Safwan Samsudeen <safwansamsudeen.c@gmail.com>
Date: Tue, 17 Dec 2024 12:37:25 +0200
Subject: [PATCH] fix: dates broken in dst

---
 src/bar.js        | 12 +-----------
 src/date_utils.js |  5 ++++-
 2 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/src/bar.js b/src/bar.js
index 39b3a90..d198f3c 100644
--- a/src/bar.js
+++ b/src/bar.js
@@ -485,17 +485,7 @@ export default class Bar {
             x_in_units * this.gantt.config.step,
             this.gantt.config.unit,
         );
-        const start_offset =
-            this.gantt.gantt_start.getTimezoneOffset() -
-            new_start_date.getTimezoneOffset();
-
-        if (start_offset) {
-            new_start_date = date_utils.add(
-                new_start_date,
-                start_offset,
-                'minute',
-            );
-        }
+        console.log(date_utils.diff(new_start_date, this.gantt.gantt_start));
 
         const width_in_units = bar.getWidth() / this.gantt.config.column_width;
         const new_end_date = date_utils.add(
diff --git a/src/date_utils.js b/src/date_utils.js
index f0526bf..cf23041 100644
--- a/src/date_utils.js
+++ b/src/date_utils.js
@@ -125,7 +125,10 @@ export default {
     diff(date_a, date_b, scale = 'day') {
         let milliseconds, seconds, hours, minutes, days, months, years;
 
-        milliseconds = date_a - date_b;
+        milliseconds =
+            date_a -
+            date_b +
+            (date_b.getTimezoneOffset() - date_a.getTimezoneOffset()) * 60000;
         seconds = milliseconds / 1000;
         minutes = seconds / 60;
         hours = minutes / 60;