feat(tab): introduce fixed variant

packages/components/demo/js/components/ComponentExample/component-overrides.scss

@@ -156,7 +156,7 @@
       min-width: 100%;
 
       @include breakpoint('42rem') {
-        min-width: 570px;
+        min-width: 720px;
       }
     }
 
@@ -165,6 +165,10 @@
       margin-top: 2rem;
     }
 
+    .bx--tabs.bx--tabs--fixed + div {
+      margin-top: 0;
+    }
+
     #tab-panel-1,
     #tab-panel-2,
     #tab-panel-3,
@@ -181,6 +185,15 @@
   }
 }
 
+.component-example__live,
+.demo--container {
+  .bx--tabs--fixed + div {
+    width: 100%;
+    height: 320px;
+    background-color: $ui-01;
+  }
+}
+
 .page-header + div > .bx--tabs {
   background-color: $field-01;
 

packages/components/src/components/tabs/_tabs.scss

@@ -32,6 +32,12 @@
     }
   }
 
+  .#{$prefix}--tabs--fixed {
+    @include carbon--breakpoint(md) {
+      min-height: rem(48px);
+    }
+  }
+
   .#{$prefix}--tabs-trigger {
     display: flex;
     align-items: center;
@@ -153,6 +159,23 @@
     }
   }
 
+  .#{$prefix}--tabs--fixed .#{$prefix}--tabs__nav-item {
+    @include carbon--breakpoint(md) {
+      background-color: $ui-03;
+
+      & + .#{$prefix}--tabs__nav-item {
+        margin-left: 0;
+        // Draws the border without affecting the inner-content
+        box-shadow: -1px 0 0 0 $ui-04;
+      }
+
+      & + .#{$prefix}--tabs__nav-item.#{$prefix}--tabs__nav-item--selected,
+      &.#{$prefix}--tabs__nav-item--selected + .#{$prefix}--tabs__nav-item {
+        box-shadow: none;
+      }
+    }
+  }
+
   .#{$prefix}--tabs__nav-item .#{$prefix}--tabs__nav-link {
     transition: color $duration--fast-01 motion(standard, productive),
       border-bottom-color $duration--fast-01 motion(standard, productive),
@@ -174,7 +197,18 @@
 
     @include carbon--breakpoint(md) {
       background-color: transparent;
-      box-shadow: none;
+
+      &,
+      & + .#{$prefix}--tabs__nav-item {
+        box-shadow: none;
+      }
+    }
+  }
+
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item:hover:not(.#{$prefix}--tabs__nav-item--disabled) {
+    @include carbon--breakpoint(md) {
+      background-color: $hover-selected-ui;
     }
   }
 
@@ -191,6 +225,23 @@
     pointer-events: none;
   }
 
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item.#{$prefix}--tabs__nav-item--disabled,
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item.#{$prefix}--tabs__nav-item--disabled:hover {
+    @include carbon--breakpoint(md) {
+      background-color: $disabled-02;
+    }
+  }
+
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item--disabled
+    .#{$prefix}--tabs__nav-link {
+    @include carbon--breakpoint(md) {
+      color: $disabled-03;
+    }
+  }
+
   //-----------------------------
   // Item Selected
   //-----------------------------
@@ -215,6 +266,26 @@
     }
   }
 
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item--selected:not(.#{$prefix}--tabs__nav-item--disabled),
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item--selected:hover:not(.#{$prefix}--tabs__nav-item--disabled) {
+    @include carbon--breakpoint(md) {
+      background-color: $ui-01;
+
+      .#{$prefix}--tabs__nav-link {
+        // Draws the border without affecting the inner-content
+        box-shadow: inset 0 2px 0 0 $interactive-04;
+        border-bottom: none;
+      }
+
+      .#{$prefix}--tabs__nav-link:focus,
+      .#{$prefix}--tabs__nav-link:active {
+        box-shadow: none;
+      }
+    }
+  }
+
   //-----------------------------
   // Link
   //-----------------------------
@@ -260,6 +331,15 @@
     }
   }
 
+  .#{$prefix}--tabs--fixed a.#{$prefix}--tabs__nav-link {
+    @include carbon--breakpoint(md) {
+      display: flex;
+      align-items: center;
+      height: rem(48px);
+      border-bottom: none;
+    }
+  }
+
   //-----------------------------
   //  Link Hover
   //-----------------------------
@@ -272,6 +352,14 @@
     }
   }
 
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item:hover:not(.#{$prefix}--tabs__nav-item--selected):not(.#{$prefix}--tabs__nav-item--disabled)
+    .#{$prefix}--tabs__nav-link {
+    @include carbon--breakpoint(md) {
+      border-bottom: none;
+    }
+  }
+
   //-----------------------------
   //  Link Disabled
   //-----------------------------
@@ -291,6 +379,14 @@
     border-bottom: $tab-underline-disabled;
   }
 
+  .#{$prefix}--tabs--fixed
+    .#{$prefix}--tabs__nav-item--disabled
+    .#{$prefix}--tabs__nav-link {
+    @include carbon--breakpoint(md) {
+      border-bottom: none;
+    }
+  }
+
   //-----------------------------
   //  Link Focus
   //-----------------------------

packages/components/src/components/tabs/tabs.config.js

@@ -9,33 +9,33 @@
 
 const { prefix } = require('../../globals/js/settings');
 
-const items = [
+const items = idSuffix => [
   {
-    linkId: 'tab-link-1',
-    panelId: 'tab-panel-1',
-    panelClass: 'tab-1',
+    linkId: `tab-link-1-${idSuffix}`,
+    panelId: `tab-panel-1-${idSuffix}`,
+    panelClass: `tab-1-${idSuffix}`,
     label: 'Tab label 1',
     panelContent: 'Content for first tab goes here.',
     selected: true,
   },
   {
-    linkId: 'tab-link-2',
-    panelId: 'tab-panel-2',
-    panelClass: 'tab-2',
+    linkId: `tab-link-2-${idSuffix}`,
+    panelId: `tab-panel-2-${idSuffix}`,
+    panelClass: `tab-2-${idSuffix}`,
     label: 'Tab label 2',
     panelContent: 'Content for second tab goes here.',
   },
   {
-    linkId: 'tab-link-3',
-    panelId: 'tab-panel-3',
-    panelClass: 'tab-3',
+    linkId: `tab-link-3-${idSuffix}`,
+    panelId: `tab-panel-3-${idSuffix}`,
+    panelClass: `tab-3-${idSuffix}`,
     label: 'Tab label 3',
     panelContent: 'Content for third tab goes here.',
   },
   {
-    linkId: 'tab-link-4',
-    panelId: 'tab-panel-4',
-    panelClass: 'tab-4',
+    linkId: `tab-link-4-${idSuffix}`,
+    panelId: `tab-panel-4-${idSuffix}`,
+    panelClass: `tab-4-${idSuffix}`,
     label: 'Tab label 4',
     panelContent: 'Content for fourth tab goes here.',
     disabled: true,
@@ -51,7 +51,15 @@ module.exports = {
       name: 'default',
       label: 'Tabs',
       context: {
-        items,
+        items: items('default'),
+      },
+    },
+    {
+      name: 'fixed',
+      label: 'Tabs (fixed)',
+      context: {
+        fixed: true,
+        items: items('fixed'),
       },
     },
   ],

packages/components/src/components/tabs/tabs.hbs

@@ -5,7 +5,7 @@
   LICENSE file in the root directory of this source tree.
 -->
 
-<div data-tabs class="{{@root.prefix}}--tabs">
+<div data-tabs class="{{@root.prefix}}--tabs{{#if fixed}} {{@root.prefix}}--tabs--fixed{{/if}}">
   <div class="{{@root.prefix}}--tabs-trigger" tabindex="0">
     <a href="javascript:void(0)" class="{{@root.prefix}}--tabs-trigger-text" tabindex="-1"></a>
     {{ carbon-icon 'ChevronDownGlyph' }}

packages/react/src/components/Tabs/Tabs-story.js

@@ -8,6 +8,7 @@
 import React from 'react';
 import { storiesOf } from '@storybook/react';
 import { action } from '@storybook/addon-actions';
+import './Tabs-story.scss';
 
 import { withKnobs, boolean, number, text } from '@storybook/addon-knobs';
 import Tabs from '../Tabs';
@@ -27,7 +28,8 @@ const props = {
       'The description of the trigger icon for narrow mode (iconDescription in <Tabs>)',
       'show menu options'
     ),
-    onClick: action('onClick'),
+    // Disabling action logger for `<Tabs onClick>` for now given it seems to be significantly slowing down Storybook
+    // onClick: action('onClick'),
     onKeyDown: action('onKeyDown'),
     onSelectionChange: action('onSelectionChange'),
     tabContentClassName: text(
@@ -94,6 +96,44 @@ storiesOf('Tabs', module)
       },
     }
   )
+  .add(
+    'Fixed',
+    () => (
+      <Tabs type="fixed" {...props.tabs()}>
+        <Tab {...props.tab()} label="Tab label 1">
+          <div className="some-content" style={{ paddingLeft: 16 }}>
+            Content for first tab goes here.
+          </div>
+        </Tab>
+        <Tab {...props.tab()} label="Tab label 2">
+          <div className="some-content" style={{ paddingLeft: 16 }}>
+            Content for second tab goes here.
+          </div>
+        </Tab>
+        <Tab
+          {...props.tab()}
+          label="Tab label 3"
+          renderContent={TabContentRenderedOnlyWhenSelected}>
+          <div className="some-content" style={{ paddingLeft: 16 }}>
+            Content for third tab goes here.
+          </div>
+        </Tab>
+        <Tab {...props.tab()} label={<CustomLabel text="Custom Label" />}>
+          <div className="some-content" style={{ paddingLeft: 16 }}>
+            Content for fourth tab goes here.
+          </div>
+        </Tab>
+      </Tabs>
+    ),
+    {
+      info: {
+        text: `
+            Tabs are used to quickly navigate between views within the same context. Create individual
+            Tab components for each item in the Tabs list.
+          `,
+      },
+    }
+  )
   .add('skeleton', () => <TabsSkeleton />, {
     info: {
       text: `

packages/react/src/components/Tabs/Tabs-story.scss

@@ -0,0 +1,9 @@
+// IMPORTANT: This import path should _not_ be used outside our source tree
+// as `src` directory is _not_ meant to be shipped in our NPM package.
+// Use e.g. `@import '~carbon-components/scss/globals/scss/styles.scss'` instead.
+@import '~carbon-components/src/globals/scss/css--helpers'; // SEE THE NOTE ABOVE
+
+.bx--tabs--fixed ~ div {
+  height: 320px;
+  background-color: $ui-01;
+}

packages/react/src/components/Tabs/Tabs-test.js

@@ -49,6 +49,20 @@ describe('Tabs', () => {
             .hasClass(`${prefix}--tabs`)
         ).toBe(true);
       });
+
+      it('supports fixed variant', () => {
+        expect(
+          shallow(
+            <Tabs className="extra-class" type="fixed">
+              <Tab label="firstTab">content1</Tab>
+              <Tab label="lastTab">content2</Tab>
+            </Tabs>
+          )
+            .find('div')
+            .first()
+            .hasClass(`${prefix}--tabs--fixed`)
+        ).toBe(true);
+      });
     });
 
     describe('Trigger (<div>)', () => {

packages/react/src/components/Tabs/Tabs.js

@@ -43,6 +43,11 @@ export default class Tabs extends React.Component {
      */
     role: PropTypes.string.isRequired,
 
+    /**
+     * Provide the type of Tab
+     */
+    type: PropTypes.oneOf(['default', 'fixed']),
+
     /**
      * Optionally provide an `onClick` handler that is invoked when a <Tab> is
      * clicked
@@ -87,6 +92,7 @@ export default class Tabs extends React.Component {
   static defaultProps = {
     iconDescription: 'show menu options',
     role: 'navigation',
+    type: 'default',
     triggerHref: '#',
     selected: 0,
     ariaLabel: 'listbox',
@@ -191,6 +197,7 @@ export default class Tabs extends React.Component {
       className,
       triggerHref,
       role,
+      type,
       onSelectionChange,
       tabContentClassName,
       ...other
@@ -241,7 +248,9 @@ export default class Tabs extends React.Component {
     });
 
     const classes = {
-      tabs: classNames(`${prefix}--tabs`, className),
+      tabs: classNames(`${prefix}--tabs`, className, {
+        [`${prefix}--tabs--fixed`]: type === 'fixed',
+      }),
       tablist: classNames(`${prefix}--tabs__nav`, {
         [`${prefix}--tabs__nav--hidden`]: this.state.dropdownHidden,
       }),