Use CSS grid for horizontal layout to fix Safari scrolling issues

Author: ShukantPal

packages/webdoc-default-template/src/styles/global.scss

@@ -32,7 +32,6 @@ a {
 
   .page {
     $page: &;
-    @include flex();
 
     width: 100%;
     @include center-margin();
@@ -50,11 +49,18 @@ a {
         }
       }
 
+      grid-row: 1;
+      max-height: 100%;
+      min-width: fit-content;
       max-width: 400px;
       overflow: auto;
     }
 
+    &-explorer {
+      grid-column: 1;
+    }
     &-members-explorer {
+      grid-column: 3;
       min-width: 200px;
     }
     &-members-explorer > *:first-child {
@@ -68,17 +74,24 @@ a {
     }
 
     &-content {
+      grid-row: 1;
+      grid-column: 2;
+
+      display: flex;
+      flex-direction: column;
       color: $colorText;
       font-family: Arial, Roboto, sans-serif;
       flex-grow: 2;
       flex-shrink: 1;
       height: 100%;
       overflow-x: hidden;// TODO: Slight horizontal scrolling pops up for some reason
-      overflow-y: auto;
+      overflow-y: scroll;
+      max-height: 100%;
+      min-width: 0;
       max-width: 800px;
       padding-left: 67px;
       padding-right: 83px;
-      width: 0;
+      -webkit-overflow-scrolling: touch;
 
       @media only screen and (max-width: 1025px) {
         padding-left: 34px;
@@ -93,10 +106,14 @@ a {
       margin-top: 24px;
     }
     &-r-divider {
+      grid-row: 1;
+      grid-column: 3;
+
       border: 1px solid $colorPrimaryLight;
       margin: 0;
       margin-top: 68px;
       height: 67vh;
+      width: 0;
     }
   }
 }

packages/webdoc-default-template/src/styles/header.scss

@@ -6,13 +6,19 @@
   display: flex;
   flex-direction: column;
   flex-grow: 1;
-  overflow-y: auto;
   min-width: 0;
   max-height: 100%;
 
   &__content {
-    display: flex;
-    overflow: auto;
+    display: grid;
+    grid-template-rows: 100%;
+    grid-template-columns: fit-content(100%) minmax(0, max-content) fit-content(100%) minmax(0, 1fr);
+    max-height: 100%;
+    overflow: hidden;/* child element must overflow/scroll on their own */
+
+    @media only screen and (max-width: 800px) {
+      grid-template-columns: fit-content(100%) minmax(0, max-content);
+    }
   }
 }
 

packages/webdoc-default-template/src/styles/members-explorer.scss

@@ -48,3 +48,9 @@
     display: none;
   }
 }
+
+.page-r-divider {
+  @media only screen and (max-width: 800px) {
+    display: none;
+  }
+}