feat: New Component SiteAlert

src/components/SiteAlert/SiteAlert.stories.tsx

@@ -0,0 +1,149 @@
+/*  eslint-disable jsx-a11y/anchor-is-valid */
+
+import React from 'react'
+
+import { SiteAlert } from './SiteAlert'
+import { Link } from '../Link/Link'
+
+export default {
+  title: 'Components/SiteAlert',
+  component: SiteAlert,
+  parameters: {
+    docs: {
+      description: {
+        component: `
+### USWDS 2.0 SiteAlert component
+
+Source: http://designsystem.digital.gov/components/site-alert
+`,
+      },
+    },
+  },
+  argTypes: {
+    slim: {
+      control: {
+        type: 'boolean',
+      },
+    },
+    showIcon: {
+      control: {
+        type: 'boolean',
+      },
+    },
+    variant: {
+      control: {
+        type: 'select',
+        options: ['info', 'emergency'],
+      },
+      defaultValue: 'info',
+    },
+  },
+}
+
+const infoHeading = 'Short alert message'
+
+const additionalContext = (
+  <p className="usa-alert__text">
+    Additional context and followup information including{' '}
+    <Link className="usa-link" href="#">
+      a link
+    </Link>
+    .
+  </p>
+)
+
+const emergencyHeading = 'Emergency alert message'
+
+const infoWithList = (
+  <ul className="usa-list">
+    <li>
+      The primary informational message and{` `}
+      <Link href="#">a link</Link>
+      {` `}for supporting context.
+    </li>
+    <li>
+      Another message,{` `}
+      <Link href="#">and another link</Link>.
+    </li>
+    <li>A final informational message.</li>
+  </ul>
+)
+
+const emergencyWithList = (
+  <ul className="usa-list">
+    <li>
+      The primary emergency message and{` `}
+      <Link href="#">a link</Link>
+      {` `}for supporting context.
+    </li>
+    <li>
+      Another message,{` `}
+      <Link href="#">and another link</Link>.
+    </li>
+    <li>A final emergency message.</li>
+  </ul>
+)
+
+const shortAlertContent = (
+  <p className="usa-alert__text">
+    <strong>Short alert message.</strong>
+    &nbsp;Additional context and followup information including&nbsp;
+    <Link href="#">a link</Link>.
+  </p>
+)
+
+export const standardInformationalSiteAlert = (): React.ReactElement => (
+  <SiteAlert variant="info" heading={infoHeading}>
+    {additionalContext}
+  </SiteAlert>
+)
+
+export const standardEmergencySiteAlert = (): React.ReactElement => (
+  <SiteAlert variant="emergency" heading={emergencyHeading}>
+    {additionalContext}
+  </SiteAlert>
+)
+
+export const informationalAlertWithNoHeader = (): React.ReactElement => (
+  <SiteAlert variant="info">{shortAlertContent}</SiteAlert>
+)
+
+export const emergencyAlertWithNoHeader = (): React.ReactElement => (
+  <SiteAlert variant="emergency">{shortAlertContent}</SiteAlert>
+)
+
+export const informationalAlertWithList = (): React.ReactElement => (
+  <SiteAlert variant="info" heading={infoHeading}>
+    {infoWithList}
+  </SiteAlert>
+)
+
+export const emergencyAlertWithList = (): React.ReactElement => (
+  <SiteAlert
+    variant="emergency"
+    heading={emergencyHeading}
+    aria-label="Site alert">
+    {emergencyWithList}
+  </SiteAlert>
+)
+
+export const slimEmergencyAlert = (): React.ReactElement => (
+  <SiteAlert slim variant="emergency">
+    {shortAlertContent}
+  </SiteAlert>
+)
+
+export const emergencyAlertNoIcon = (): React.ReactElement => (
+  <SiteAlert showIcon={false} variant="emergency">
+    {shortAlertContent}
+  </SiteAlert>
+)
+
+export const alertWithCustomControls = (argTypes): React.ReactElement => (
+  <SiteAlert
+    slim={argTypes.slim}
+    showIcon={argTypes.showIcon}
+    variant={argTypes.variant}>
+    {shortAlertContent}
+  </SiteAlert>
+)

src/components/SiteAlert/SiteAlert.test.tsx

@@ -0,0 +1,124 @@
+/*  eslint-disable jsx-a11y/anchor-is-valid, react/jsx-key */
+import React from 'react'
+import { render } from '@testing-library/react'
+
+import { Link } from '../Link/Link'
+
+import { SiteAlert } from './SiteAlert'
+
+const testChildren = (
+  <p className="usa-alert__text">
+    some default text&nbsp;
+    <Link href="#">with a link</Link>.
+  </p>
+)
+
+const testDefaultProps = {
+  heading: 'test heading',
+  children: testChildren,
+}
+
+const testChildrenWithList = (
+  <ul>
+    <li>
+      some default text&nbsp;
+      <Link href="#">with a link&nbsp;</Link>
+    </li>
+    <li>
+      another list item&nbsp;
+      <Link href="#">with a link</Link>
+    </li>
+    <li>another list item, no link</li>
+  </ul>
+)
+
+describe('SiteAlert component', () => {
+  it('renders without errors', () => {
+    const { getByTestId, getByRole } = render(
+      <SiteAlert variant="info" {...testDefaultProps} />
+    )
+
+    expect(getByTestId('siteAlert')).toBeInTheDocument()
+    expect(getByRole('link')).toBeInTheDocument()
+  })
+
+  it('accepts a className', () => {
+    const { getByTestId } = render(
+      <SiteAlert
+        variant="info"
+        className="custom-class-name"
+        {...testDefaultProps}
+      />
+    )
+
+    expect(getByTestId('siteAlert')).toHaveClass(
+      'usa-site-alert usa-site-alert--info custom-class-name'
+    )
+  })
+
+  it('accepts a custom aria-label', () => {
+    const { getByTestId } = render(
+      <SiteAlert
+        variant="emergency"
+        aria-label="custom aria label"
+        {...testDefaultProps}
+      />
+    )
+
+    expect(getByTestId('siteAlert')).toHaveAttribute(
+      'aria-label',
+      'custom aria label'
+    )
+  })
+
+  it('renders a passed in heading', () => {
+    const { getByRole, queryByText } = render(
+      <SiteAlert variant="info" {...testDefaultProps} />
+    )
+
+    const heading = getByRole('heading')
+    expect(heading).toBeInTheDocument()
+    expect(heading).toHaveClass('usa-alert__heading')
+    expect(queryByText('test heading')).toBeInTheDocument()
+  })
+
+  it('renders emergency site alert without errors', () => {
+    const { getByTestId } = render(
+      <SiteAlert variant="emergency" {...testDefaultProps} />
+    )
+
+    expect(getByTestId('siteAlert')).toHaveClass(
+      'usa-site-alert usa-site-alert--emergency'
+    )
+  })
+
+  it('renders passed in link', () => {
+    const { getByRole } = render(
+      <SiteAlert variant="info">{testChildren}</SiteAlert>
+    )
+
+    expect(getByRole('link')).toBeInTheDocument()
+    expect(getByRole('link')).toHaveClass('usa-link')
+  })
+
+  it('renders a passed in list', () => {
+    const { getAllByRole } = render(
+      <SiteAlert variant="emergency">{testChildrenWithList}</SiteAlert>
+    )
+    expect(getAllByRole('link')).toHaveLength(2)
+  })
+
+  it('renders slim and no icon when passed both, and does not apply no-header class', () => {
+    const { getByTestId } = render(
+      <SiteAlert variant="info" slim={true} showIcon={false}>
+        {testChildren}
+      </SiteAlert>
+    )
+    expect(getByTestId('siteAlert')).toHaveClass(
+      'usa-site-alert usa-site-alert--info usa-site-alert--no-icon usa-site-alert--slim'
+    )
+    expect(getByTestId('siteAlert')).not.toHaveClass(
+      'usa-site-alert--no-heading'
+    )
+  })
+})

src/components/SiteAlert/SiteAlert.tsx

@@ -0,0 +1,49 @@
+import React from 'react'
+import classnames from 'classnames'
+
+interface SiteAlertProps {
+  variant: 'info' | 'emergency'
+  children: React.ReactNode
+  heading?: string
+  showIcon?: boolean
+  slim?: boolean
+  className?: string
+}
+
+export const SiteAlert = ({
+  variant,
+  children,
+  heading,
+  showIcon = true,
+  slim = false,
+  className,
+  ...sectionProps
+}: SiteAlertProps & JSX.IntrinsicElements['section']): React.ReactElement => {
+  const classes = classnames(
+    'usa-site-alert',
+    {
+      'usa-site-alert--info': variant === 'info',
+      'usa-site-alert--emergency': variant === 'emergency',
+      'usa-site-alert--no-heading': heading === undefined && !slim,
+      'usa-site-alert--no-icon': !showIcon,
+      'usa-site-alert--slim': slim,
+    },
+    className
+  )
+  return (
+    <section
+      data-testid="siteAlert"
+      className={classes}
+      aria-label="Site alert"
+      {...sectionProps}>
+      <div className="usa-alert">
+        <div className="usa-alert__body">
+          {heading && <h3 className="usa-alert__heading">{heading}</h3>}
+          {children}
+        </div>
+      </div>
+    </section>
+  )
+}
+
+export default SiteAlert

src/index.ts

@@ -90,6 +90,8 @@ export { StepIndicatorStep } from './components/stepindicator/StepIndicatorStep/
 
 export { Search } from './components/Search/Search'
 
+export { SiteAlert } from './components/SiteAlert/SiteAlert'
+
 /** Truss-designed components */
 export {
   Modal,