feature: create accordion component and story

src/components/Accordion/Accordion.examples.story.tsx

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+import React from 'react';
+import { Accordion } from './Accordion';
+import { Layout } from '../../storybook';
+import styled from 'styled-components';
+import { Gear } from '../../icons';
+import { rem } from 'polished';
+import { core } from '../../tokens';
+
+export default {
+  title: 'components/Accordion/examples',
+  component: Accordion,
+  argTypes: {
+    allowMultiple: { control: { disable: true } },
+    defaultIndex: { control: { disable: true } },
+    format: { control: { disable: true } },
+  },
+};
+
+export function AccordionWithSubcopy({ args }) {
+  return (
+    <Layout.StoryVertical center>
+      <Accordion {...args}>
+        <Accordion.Item
+          title="Accordion item title"
+          subcopy="Subcopy text"
+        >
+          Accordion content
+        </Accordion.Item>
+      </Accordion>
+    </Layout.StoryVertical>
+  );
+}
+
+AccordionWithSubcopy.storyName = 'Accordion - subcopy';
+
+export function AccordionWithIcon({ args }) {
+  return (
+    <Layout.StoryVertical center>
+      <Accordion {...args}>
+        <Accordion.Item
+          title="Accordion item with icon"
+          icon={<GearIcon />}
+        >
+          Accordion content
+        </Accordion.Item>
+      </Accordion>
+    </Layout.StoryVertical>
+  );
+}
+
+const GearIcon = styled(Gear)`
+  width: ${rem(22)};
+  margin-right: ${rem(10)};
+  path {
+    fill: ${core.color.text.primary};
+  }
+`;
+
+AccordionWithIcon.storyName = 'Accordion - icon';
+
+export function DisabledAccordion({ args }) {
+  return (
+    <Layout.StoryVertical center>
+      <Accordion {...args}>
+        <Accordion.Item
+          title="Disabled accordion item"
+          disabled={true}
+        >
+          Accordion content
+        </Accordion.Item>
+      </Accordion>
+    </Layout.StoryVertical>
+  );
+}
+
+DisabledAccordion.storyName = 'Accordion - disabled';
+
+export function AccordionWithError({ args }) {
+  return (
+    <Layout.StoryVertical center>
+      <Accordion {...args}>
+        <Accordion.Item
+          title="Accordion item with error"
+          hasError={true}
+        >
+          Accordion content
+        </Accordion.Item>
+      </Accordion>
+    </Layout.StoryVertical>
+  );
+}
+
+AccordionWithError.storyName = 'Accordion - error';
+
+export function AccordionWithAllowMultipleFalse({ args }) {
+  return (
+    <Layout.StoryVertical center>
+      <Accordion {...args} allowMultiple={false} defaultIndex={0}>
+        <Accordion.Item title="Accordion item 1">
+          Accordion content
+        </Accordion.Item>
+        <Accordion.Item title="Accordion item 2">
+          Accordion content
+        </Accordion.Item>
+        <Accordion.Item title="Accordion item 3">
+          Accordion content
+        </Accordion.Item>
+      </Accordion>
+    </Layout.StoryVertical>
+  );
+}
+
+AccordionWithAllowMultipleFalse.storyName =
+  'Accordion - allowMultiple is false';
+
+export function AccordionAllowMultiple({ args }) {
+  return (
+    <Layout.StoryVertical center>
+      <Accordion {...args}>
+        <Accordion.Item title="Accordion item 1">
+          Accordion content
+        </Accordion.Item>
+        <Accordion.Item title="Accordion item 2">
+          Accordion content
+        </Accordion.Item>
+        <Accordion.Item title="Accordion item 3">
+          Accordion content
+        </Accordion.Item>
+      </Accordion>
+    </Layout.StoryVertical>
+  );
+}
+
+AccordionAllowMultiple.storyName =
+  'Accordion - allowMultiple is true (default)';

src/components/Accordion/Accordion.minors.tsx

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+import React, { useState } from 'react';
+
+import {
+  Content,
+  ChevronUp,
+  CircleWarningIcon,
+  Header,
+  StyledChevronDown,
+  Subcopy,
+  Title,
+  TitleContainer,
+  TriggerContainer,
+  Wrapper,
+} from './Accordion.style';
+import { MinorComponent } from '../../utils';
+import { AccordionItemProps } from './Accordion.types';
+
+export interface Minors {
+  Item: MinorComponent<any>;
+}
+
+export function Item({
+  children,
+  title,
+  format,
+  index,
+  allowMultiple,
+  defaultActive,
+  setActiveIndex,
+  itemActive,
+  subcopy = '',
+  icon,
+  hasError = false,
+  disabled = false,
+}: AccordionItemProps) {
+  const [active, setActive] = useState<boolean>(defaultActive);
+  const isActive = allowMultiple
+    ? active && !disabled
+    : itemActive && !disabled;
+
+  return (
+    <Wrapper
+      active={isActive}
+      disabled={disabled}
+      format={format}
+      key={index}
+    >
+      <TriggerContainer
+        onClick={() => {
+          if (allowMultiple) {
+            setActive(!active);
+          } else {
+            setActiveIndex({ index });
+          }
+        }}
+        tabIndex={0}
+        format={format}
+        active={isActive}
+      >
+        <Header>
+          {hasError && <CircleWarningIcon />}
+          {!hasError && icon && icon}
+          <TitleContainer>
+            <Title>{title}</Title>
+            {subcopy && <Subcopy>{subcopy}</Subcopy>}
+          </TitleContainer>
+        </Header>
+        {isActive ? (
+          <ChevronUp width="24" />
+        ) : (
+          <StyledChevronDown width="24" />
+        )}
+      </TriggerContainer>
+      {isActive && <Content active={isActive}>{children}</Content>}
+    </Wrapper>
+  );
+}

src/components/Accordion/Accordion.props.story.tsx

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+import React from 'react';
+import styled, { css } from 'styled-components';
+import { rem } from 'polished';
+
+import { Accordion } from './Accordion';
+
+export default {
+  title: 'components/Accordion/props',
+  component: Accordion,
+  argTypes: {
+    allowMultiple: { control: { disable: true } },
+    defaultIndex: { control: { disable: true } },
+    format: { control: { disable: true } },
+  },
+};
+
+const formats = ['basic', 'secondary'];
+
+export function Formats({ args }) {
+  return (
+    <Container>
+      {formats.map((format) => (
+        <Accordion format={format} {...args}>
+          <Accordion.Item title={`Accordion format: ${format}`}>
+            Accordion content
+          </Accordion.Item>
+        </Accordion>
+      ))}
+    </Container>
+  );
+}
+
+const Container = styled.div`
+  width: 50%;
+  display: flex;
+  flex-direction: column;
+  gap: ${rem(8)};
+`;

src/components/Accordion/Accordion.story.tsx

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+import React from 'react';
+import { Story } from '@storybook/react';
+
+import { Accordion } from './Accordion';
+import { Props } from './Accordion.types';
+import styled from 'styled-components';
+import { Gear } from '../../icons';
+import { rem } from 'polished';
+
+export default {
+  title: 'components/Accordion',
+  component: Accordion,
+};
+
+const Template: Story<Props> = (args) => {
+  return (
+    <Container>
+      <Accordion {...args}>
+        <Accordion.Item title="Accordion item 1">
+          Accordion content
+        </Accordion.Item>
+        <Accordion.Item title="Accordion item 2">
+          Accordion content
+        </Accordion.Item>
+      </Accordion>
+    </Container>
+  );
+};
+
+const Container = styled.div`
+  width: 50%;
+`;
+
+export const Controls = Template.bind({});
+Controls.storyName = 'Accordion';