diff --git a/development/issues/open/301.html b/development/issues/open/301.html
index f1e231d2059d88e1ae91111d7adc676e2493c220..c765657eee7db4629b0619dfa058dc3a4636efe2 100644
--- a/development/issues/open/301.html
+++ b/development/issues/open/301.html
@@ -3,13 +3,13 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Slider view more slides #239</title>
-    <script src="./239.mjs" type="module"></script>
+    <title>Slider doesn't react to all defined breakpoints #301</title>
+    <script src="./301.mjs" type="module"></script>
 </head>
 <body>
-<h1>Slider view more slides #239</h1>
+<h1>Slider doesn't react to all defined breakpoints #301</h1>
 <ul>
-    <li><a href="https://gitlab.schukai.com/oss/libraries/javascript/monster/-/issues/239">Issue #239</a></li>
+    <li><a href="https://gitlab.schukai.com/oss/libraries/javascript/monster/-/issues/301">Issue #301</a></li>
     <li><a href="/">Back to overview</a></li>
 </ul>
 <main style="width: 1200px">
@@ -21,6 +21,8 @@
             data-monster-option-slides-600="2" 
             data-monster-option-slides-1200="3" 
             data-monster-option-slides-1800="4">
+
+            <!-- reaction only on breakpoint 1200 -->
         
             <div slot="next">
                 <svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" fill="currentColor"
diff --git a/development/issues/open/301.mjs b/development/issues/open/301.mjs
new file mode 100644
index 0000000000000000000000000000000000000000..c122b1beb371b78dea470aef925a07ce2d048e0c
--- /dev/null
+++ b/development/issues/open/301.mjs
@@ -0,0 +1,16 @@
+/**
+* @file development/issues/open/301.mjs
+* @url https://gitlab.schukai.com/oss/libraries/javascript/monster/-/issues/301
+* @description breakpoints monster-slider
+* @issue 301
+*/
+
+import "../../../source/components/style/property.pcss";
+import "../../../source/components/style/link.pcss";
+import "../../../source/components/style/color.pcss";
+import "../../../source/components/style/theme.pcss";
+import "../../../source/components/style/normalize.pcss";
+import "../../../source/components/style/typography.pcss";
+import "../../../source/components/layout/slider.mjs";
+import "../../../source/components/datatable/pagination.mjs";
+