demo config fix

js/demo.js

@@ -3,6 +3,7 @@
 class TablerDemo {
   constructor() {
     this.init();
+    this.initFormControls();
 
     this.form = document.querySelector('.js-layout-form');
 
@@ -18,8 +19,6 @@ class TablerDemo {
           this.onSubmitForm();
         });
       }
-
-      this.initFormControls();
     }
   };
 
@@ -79,12 +78,14 @@ class TablerDemo {
   };
 
   setFormValue = function(name, value,) {
+    if(this.form) {
       let elements = this.form.querySelectorAll(`[name="${name}"]`);
 
-    if(elements) {
+      if (elements) {
         elements.forEach((e) => e.checked = false);
         this.form.querySelector(`[name="${name}"][value="${value}"]`).checked = true;
       }
+    }
   };
 
   /*

scss/layout/_navbar.scss

@@ -210,6 +210,7 @@ Fixed navbar
   top: 0;
   bottom: 0;
 
+  @include media-breakpoint-up(xl) {
     & + .layout-main {
       margin-left: $sidenav-width;
     }
@@ -218,7 +219,9 @@ Fixed navbar
       margin-left: 0;
       margin-right: $sidenav-width;
     }
+  }
 
+  @include media-breakpoint-up(lg) {
     &.navbar-folded + .layout-main {
       margin-left: $sidenav-folded-width;
     }
@@ -227,6 +230,7 @@ Fixed navbar
       margin-left: 0;
       margin-right: $sidenav-folded-width;
     }
+  }
 }
 
 /*