feat: Add Divider component

modules/preview-react/divider/LICENSE

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modules/preview-react/divider/README.md

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+
+# Canvas Kit Divider
+
+<a href="https://github.com/Workday/canvas-kit/tree/master/modules/preview-react/README.md">
+  <img src="https://img.shields.io/badge/PREVIEW-beta-blueviolet" alt="PREVIEW: Beta" />
+</a>  This component is work in progress and currently in prerelease.
+
+A divider to segment and visually organize content
+
+View the [documentation for Divider](https://workday.github.io/canvas-kit/?path=/docs/preview-divider-react)
+on Storybook.

modules/preview-react/divider/index.ts

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+export * from './lib/Divider';

modules/preview-react/divider/lib/Divider.tsx

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+import * as React from 'react';
+import {createComponent} from '@workday/canvas-kit-react/common';
+import {createStencil, handleCsProp, CSProps, calc, cssVar} from '@workday/canvas-kit-styling';
+import {system} from '@workday/canvas-tokens-web';
+
+export const dividerStencil = createStencil({
+  vars: {
+    space: cssVar(system.space.x4),
+  },
+  base: ({space}) => {
+    return {
+      display: 'block',
+      height: 1,
+      border: 'none',
+      borderTop: `1px solid ${system.color.border.divider}`,
+      margin: `${calc.divide(space, 2)} 0`,
+    };
+  },
+});
+
+interface DividerProps extends CSProps {
+  space?: string;
+}
+
+/**
+ * # Divider
+ * A divider to segment and visually organize content. By default, it renders a semantic `<hr>` element.
+ *
+ * [View Docs](https://workday.github.io/canvas-kit/?path=/docs/preview-divider-react)
+ *
+ * The `space` prop will equally apply top and bottom margin styles.
+ * In the example below, `x2` (0.5rem), adds `0.25rem` margin to the top and `0.25rem` to the bottom
+ *
+ * @example
+ * ```tsx
+ * import { Divider } from '@workday/canvas-kit-preview-react/divider';
+ * import {system} from '@workday/canvas-tokens-web';
+ *
+ * <Divider space={system.space.x2} />
+ *
+ * ```
+ *
+ * ## Accessibility
+ *
+ * Screen readers announce `<hr>` elements to alert users to a break in content. If you're using `Divider` as a purely decorative element and not a thematic break, you should use `aria-hidden` to prevent screen readers from announcing it.
+ *
+ * ```tsx
+ * <Divider aria-hidden={true} />
+ *```
+ */
+export const Divider = createComponent('hr')({
+  displayName: 'Divider',
+  Component: ({space, ...elemProps}: DividerProps, ref, Element) => (
+    <Element ref={ref} {...handleCsProp(elemProps, dividerStencil({space}))} />
+  ),
+});

modules/preview-react/divider/spec/SSR.spec.tsx

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+/**
+ * @jest-environment node
+ */
+import React from 'react';
+import {renderToString} from 'react-dom/server';
+import {Divider} from '../';
+
+describe('Divider', () => {
+  it('should render on a server without crashing', () => {
+    const ssrRender = () => renderToString(<Divider />);
+    expect(ssrRender).not.toThrow();
+  });
+});

modules/preview-react/divider/spec/tsconfig.json

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+
+{
+  "extends": "../../../../tsconfig.spec.json"
+}

modules/preview-react/divider/stories/Divider.stories.mdx

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+
+import {SymbolDoc, Specifications} from '@workday/canvas-kit-docs';
+
+import {Divider} from '@workday/canvas-kit-preview-react/divider';
+import {Basic} from './examples/Basic';
+import {CustomSpace} from './examples/CustomSpace';
+
+<Meta title="Preview/Divider" component={Divider} />
+
+# Divider
+
+A `Divider` segments and visually organizes content.
+
+## Installation
+
+```sh
+yarn add @workday/canvas-kit-preview-react
+```
+
+## Usage
+
+Use a `Divider` to separate content and create visual hierarchy. Typically they are used between paragraph sections to indicate a break or shift in content. However, they can also be used as decorative elements to provide greater emphasis and visual hierarchy.
+
+### Basic Example
+
+By default, `Divider` renders a `<hr>` (horizontal rule) element with `0.5rem` of margin on top and bottom. The `space` prop allows you to adjust the vertical margin evenly. In the example below, the `Divider`s provide a subtle deliniation between each profile card without being as visually prominent as a `Card`. The `space` is adjusted to `0.25rem` which applied `0.125rem` to the top and bottom margin.
+
+<ExampleCodeBlock code={Basic} />
+
+### Custom Space
+
+You might also want to apply custom space to `Divider` where the top and bottom margin are not equal. The best way to achieve this is with `createStyles` and the `cs` property. In the example below, the `Divider` is applied as a decorative element to add emphasis to the section heading. Custom styles are defined in the `createStyles` function outside the component and are passed to `Divider`'s `cs` prop. These styles remove the top margin and set the bottom margin to `1rem`.
+
+<ExampleCodeBlock code={CustomSpace} />
+
+## Component API
+
+<SymbolDoc name="Divider" hideDescription />

modules/preview-react/divider/stories/examples/Basic.tsx

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+import React from 'react';
+import {Divider} from '@workday/canvas-kit-preview-react/divider';
+import {createStyles} from '@workday/canvas-kit-styling';
+import {system} from '@workday/canvas-tokens-web';
+import {Avatar} from '@workday/canvas-kit-react/avatar';
+
+const sectionStyles = createStyles({
+  display: 'flex',
+  flexDirection: 'column',
+  gap: system.space.x4,
+  maxWidth: '40rem',
+});
+
+export const Basic = () => {
+  const lastIndex = maintainerList.length - 1;
+  return (
+    <section className={sectionStyles}>
+      {maintainerList.map((maintainerData, index) => (
+        <>
+          <ProfileCard {...maintainerData} />
+          {index !== lastIndex && <Divider space={system.space.x1} />}
+        </>
+      ))}
+    </section>
+  );
+};
+
+const maintainerList = [
+  {
+    id: '44883293',
+    name: 'Josh Bagwell',
+    bio: 'Software Development Engineer',
+  },
+  {
+    id: '338257',
+    name: 'Nicholas Boll',
+    bio: 'Principal Software Development Engineer',
+  },
+  {
+    id: '7966550',
+    name: 'Manuel Carrera',
+    bio: 'Sr. Software Development Engineer',
+  },
+  {
+    id: '146020',
+    name: 'James Fan',
+    bio: 'Sr. Software Development Engineer',
+  },
+  {
+    id: '48605821',
+    name: 'Raisa Primerova',
+    bio: 'Software Development Engineer',
+  },
+  {
+    id: '4818182',
+    name: 'Alan Smith',
+    bio: 'Principal Software Development Engineer',
+  },
+];
+
+const profileCardStyles = createStyles({
+  display: 'grid',
+  gridGap: '0.5rem',
+  gridTemplateColumns: '5rem 1fr',
+  gridTemplateRows: '1fr 1fr',
+});
+
+const profileCardAvatarStyles = createStyles({
+  gridColumn: '1',
+  gridRow: '1 / 3',
+});
+
+const profileCardHeadingStyles = createStyles({
+  ...system.type.body.large,
+  fontWeight: system.fontWeight.bold,
+  gridColumn: '2/3',
+  gridRow: '1',
+  margin: 0,
+});
+
+const profileCardBodyStyles = createStyles({
+  ...system.type.body.small,
+  gridColumn: '2',
+  gridRow: '2',
+  margin: 0,
+});
+
+interface ProfileCardProps {
+  id: string;
+  name: string;
+  bio: string;
+}
+
+const ProfileCard = ({id, name, bio}: ProfileCardProps) => (
+  <div className={profileCardStyles}>
+    <Avatar
+      size={Avatar.Size.xl}
+      url={`https://avatars.githubusercontent.com/u/${id}?v=4`}
+      altText={`${name}'s avatar`}
+      className={profileCardAvatarStyles}
+    />
+    <h3 className={profileCardHeadingStyles}>{name}</h3>
+    <p className={profileCardBodyStyles}>{bio}</p>
+  </div>
+);

modules/preview-react/divider/stories/examples/CustomSpace.tsx

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+import React from 'react';
+import {Divider} from '@workday/canvas-kit-preview-react/divider';
+import {createStyles} from '@workday/canvas-kit-styling';
+import {system} from '@workday/canvas-tokens-web';
+
+const headingStyles = createStyles({
+  ...system.type.body.large,
+  fontWeight: system.fontWeight.bold,
+  margin: 0,
+});
+
+const bodyStyles = createStyles({
+  ...system.type.body.small,
+  margin: 0,
+});
+
+const customDividerSpace = createStyles({
+  margin: `0 0 ${system.space.x4}`,
+});
+
+export const CustomSpace = () => {
+  return (
+    <section>
+      <h3 className={headingStyles}>Quote of the Day</h3>
+      <Divider cs={customDividerSpace} />
+      <p className={bodyStyles}>
+        "It is not our differences that divide us. It is our inability to recognize, accept, and
+        celebrate those differences." – Audre Lorde
+      </p>
+    </section>
+  );
+};

modules/preview-react/divider/stories/tsconfig.json

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+
+{
+  "extends": "../../../../tsconfig.stories.json"
+}

modules/preview-react/divider/stories/visual-testing/stories_Divider.tsx

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+import React from 'react';
+
+import {StaticStates, ComponentStatesTable} from '@workday/canvas-kit-react/testing';
+import {withSnapshotsEnabled} from '../../../../../utils/storybook';
+
+import {Divider} from '@workday/canvas-kit-preview-react/divider';
+import {system} from '@workday/canvas-tokens-web';
+
+export default withSnapshotsEnabled({
+  title: 'Testing/Preview/Divider',
+  component: Divider,
+});
+
+export const DividerStates = () => {
+  return (
+    <StaticStates>
+      <ComponentStatesTable
+        columnProps={[{label: 'Default', props: {}}]}
+        rowProps={[
+          {
+            label: 'Default Space',
+            props: {},
+          },
+          {
+            label: 'Custom Space',
+            props: {space: system.space.x8},
+          },
+        ]}
+      >
+        {props => {
+          return (
+            <div>
+              <h3 style={{margin: 0}}>Quote of the Day</h3>
+              <Divider {...props} />
+              <p style={{margin: 0}}>
+                "It is not our differences that divide us. It is our inability to recognize, accept,
+                and celebrate those differences." – Audre Lorde
+              </p>
+            </div>
+          );
+        }}
+      </ComponentStatesTable>
+    </StaticStates>
+  );
+};

modules/preview-react/index.ts

@@ -1,12 +1,13 @@
 export * from './color-picker';
+export * from './divider';
 export * from './form-field';
 export * from './loading-sparkles';
 export * from './menu';
 export * from './pill';
+export * from './radio';
 export * from './segmented-control';
 export * from './select';
 export * from './side-panel';
 export * from './status-indicator';
 export * from './text-area';
 export * from './text-input';
-export * from './radio';