Naming conventions; Add variables

css/_variables.scss

  */
 $welcomePageDescriptionColor: #fff;
 $welcomePageFontFamily: inherit;
-$welcomePageHeaderBackground: linear-gradient(-90deg, #1251AE 0%, #0074FF 50%, #1251AE 100%);
+$welcomePageBackground: linear-gradient(-90deg, #1251AE 0%, #0074FF 50%, #1251AE 100%);
 $welcomePageTitleColor: #fff;
 
+$welcomePageHeaderBackground: none;
+$welcomePageHeaderBackgroundSmall: none;
+$welcomePageHeaderBackgroundPosition: none;
+$welcomePageHeaderBackgroundRepeat: none;
+$welcomePageHeaderBackgroundSize: none;
+$welcomePageHeaderPaddingBottom: 0px;
+
+$welcomePageHeaderTextMarginTop: 35px;
+$welcomePageHeaderTextMarginBottom: 35px;
+
+$welcomePageHeaderTextTitleMarginBottom: 16px;
+
+$welcomePageHeaderTextDescriptionDisplay: inherit;
+
+$welcomePageEnterRoomWidth: 680px;
+$welcomePageEnterRoomPadding: 25px 30px;
+$welcomePageEnterRoomBorderRadius: 0px;
+
+$welcomePageEnterRoomInputContainerPadding: 0 8px 5px 0px;
+$welcomePageEnterRoomInputContainerBorderWidth: 0px 0px 2px 0px;
+$welcomePageEnterRoomInputContainerBorderStyle: solid;
+$welcomePageEnterRoomInputContainerBorderImage: linear-gradient(to right, #dee1e6, #fff) 1;
+
+$welcomePageEnterRoomTitleDisplay: inherit;
+
+$welcomePageTabContainerDisplay: flex;
+$welcomePageTabContentDisplay: inherit;
+$welcomePageTabButtonsDisplay: flex;
+$welcomePageTabDisplay: inherit;
+
+$welcomePageButtonWidth: 51px;
+$welcomePageButtonHeight: 35px;
+$welcomePageButtonFontWeight: inherit;
+$welcomePageButtonBorderRadius: 4px;
+$welcomePageButtonLineHeight: 35px;
+
 /**
  * Deep-linking page variables.
  */

css/_welcome_page.scss

 }
 
 .welcome {
-    background-image: $welcomePageHeaderBackground;
+    background-image: $welcomePageBackground;
     display: flex;
     flex-direction: column;
     font-family: $welcomePageFontFamily;
     position: relative;
 
     .header {
+        background-image: $welcomePageHeaderBackground;
+        background-position: $welcomePageHeaderBackgroundPosition;
+        background-repeat: $welcomePageHeaderBackgroundRepeat;
+        background-size: $welcomePageHeaderBackgroundSize;
+        padding-bottom: $welcomePageHeaderPaddingBottom;
         align-items: center;
         display: flex;
         flex-direction: column;
         .header-text {
             display: flex;
             flex-direction: column;
-            margin-top: $watermarkHeight + 35;
-            margin-bottom: 35px;
+            margin-top: $watermarkHeight + $welcomePageHeaderTextMarginTop;
+            margin-bottom: $welcomePageHeaderTextMarginBottom;
             max-width: calc(100% - 40px);
             width: 650px;
             z-index: $zindex2;
             font-size: 2.5rem;
             font-weight: 500;
             line-height: 1.18;
-            margin-bottom: 16px;
+            margin-bottom: $welcomePageHeaderTextTitleMarginBottom;
         }
 
         .header-text-description {
+            display: $welcomePageHeaderTextDescriptionDisplay;
             color: $welcomePageDescriptionColor;
             font-size: 1rem;
             font-weight: 400;
             display: flex;
             align-items: center;
             max-width: calc(100% - 40px);
-            width: 680px;
+            width: $welcomePageEnterRoomWidth;
             z-index: $zindex2;
             background-color: #fff;
-            padding: 25px 30px;
+            padding: $welcomePageEnterRoomPadding;
+            border-radius: $welcomePageEnterRoomBorderRadius;
 
             .enter-room-input-container {
                 width: 100%;
-                padding-right: 8px;
-                padding-bottom: 5px;
+                padding: $welcomePageEnterRoomInputContainerPadding;
                 text-align: left;
                 color: #253858;
                 height: fit-content;
-                border-width: 0px 0px 2px 0px;
-                border-style: solid;
-                border-image: linear-gradient(to right, #dee1e6, #fff) 1;
+                border-width: $welcomePageEnterRoomInputContainerBorderWidth;
+                border-style: $welcomePageEnterRoomInputContainerBorderStyle;
+                border-image: $welcomePageEnterRoomInputContainerBorderImage;
 
                 .enter-room-title {
+                    display: $welcomePageEnterRoomTitleDisplay;
                     font-size: 18px;
                     font-weight: bold;
                     padding-bottom: 5px;
             min-height: 354px;
             width: 710px;
             background: #75A7E7;
-            display: flex;
+            display: $welcomePageTabContainerDisplay;
             flex-direction: column;
 
             .tab-content{
+                display: $welcomePageTabContentDisplay;
                 margin: 5px 0px;
                 overflow: hidden;
                 flex-grow: 1;
             .tab-buttons {
                 font-size: 18px;
                 color: #FFFFFF;
-                display: flex;
+                display: $welcomePageTabButtonsDisplay;
                 flex-grow: 0;
                 flex-direction: row;
                 min-height: 54px;
                 width: 100%;
 
                 .tab {
+                    display: $welcomePageTabDisplay;
                     text-align: center;
                     background: rgba(9,30,66,0.37);
                     height: 55px;
     }
 
     .welcome-page-button {
-        width: 51px;
-        height: 35px;
+        width: $welcomePageButtonWidth;
+        height: $welcomePageButtonHeight;
         font-size: 14px;
+        font-weight: $welcomePageButtonFontWeight;
         background: #0074E0;
-        border-radius: 4px;
+        border-radius: $welcomePageButtonBorderRadius;
         color: #FFFFFF;
         text-align: center;
         vertical-align: middle;
-        line-height: 35px;
+        line-height: $welcomePageButtonLineHeight;
         cursor: pointer;
     }
 

interface_config.js

     SHOW_DEEP_LINKING_IMAGE: false,
     GENERATE_ROOMNAMES_ON_WELCOME_PAGE: true,
     DISPLAY_WELCOME_PAGE_CONTENT: true,
-    DISPLAY_WELCOME_PAGE_TOOLBAR_CONTENT: false,
+    DISPLAY_WELCOME_PAGE_TOOLBAR_ADDITIONAL_CONTENT: false,
     APP_NAME: 'Jitsi Meet',
     NATIVE_APP_NAME: 'Jitsi Meet',
     PROVIDER_NAME: 'Jitsi',

react/features/welcome/components/WelcomePage.web.js

      * @returns {boolean}
      */
     _shouldShowAdditionalToolbarContent() {
-        return interfaceConfig.DISPLAY_WELCOME_PAGE_TOOLBAR_CONTENT
+        return interfaceConfig.DISPLAY_WELCOME_PAGE_TOOLBAR_ADDITIONAL_CONTENT
             && this._additionalToolbarContentTemplate
             && this._additionalToolbarContentTemplate.content
             && this._additionalToolbarContentTemplate.innerHTML.trim();