From 3d377c2a23e6267f6e106ca58ca7f3b09ed62fc9 Mon Sep 17 00:00:00 2001
From: Vladimir Kharlampidi <nolimits4web@gmail.com>
Date: Fri, 24 Dec 2021 13:11:39 +0300
Subject: [PATCH] fix(pagination): fix dynamic bullets position with `loop`
 enabled

fixes #5304
---
 src/modules/pagination/pagination.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/modules/pagination/pagination.js b/src/modules/pagination/pagination.js
index 27c775f24..3b4ef1441 100644
--- a/src/modules/pagination/pagination.js
+++ b/src/modules/pagination/pagination.js
@@ -107,14 +107,14 @@ export default function Pagination({ swiper, extendParams, on, emit }) {
           `${bulletSize * (params.dynamicMainBullets + 4)}px`,
         );
         if (params.dynamicMainBullets > 1 && swiper.previousIndex !== undefined) {
-          dynamicBulletIndex += current - swiper.previousIndex;
+          dynamicBulletIndex += current - (swiper.previousIndex - swiper.loopedSlides || 0);
           if (dynamicBulletIndex > params.dynamicMainBullets - 1) {
             dynamicBulletIndex = params.dynamicMainBullets - 1;
           } else if (dynamicBulletIndex < 0) {
             dynamicBulletIndex = 0;
           }
         }
-        firstIndex = current - dynamicBulletIndex;
+        firstIndex = Math.max(current - dynamicBulletIndex, 0);
         lastIndex = firstIndex + (Math.min(bullets.length, params.dynamicMainBullets) - 1);
         midIndex = (lastIndex + firstIndex) / 2;
       }
@@ -153,7 +153,7 @@ export default function Pagination({ swiper, extendParams, on, emit }) {
             bullets.eq(i).addClass(`${params.bulletActiveClass}-main`);
           }
           if (swiper.params.loop) {
-            if (bulletIndex >= bullets.length - params.dynamicMainBullets) {
+            if (bulletIndex >= bullets.length) {
               for (let i = params.dynamicMainBullets; i >= 0; i -= 1) {
                 bullets.eq(bullets.length - i).addClass(`${params.bulletActiveClass}-main`);
               }