UI Component

UI Component Creation Skill

Checklist (MUST complete all)

• Create component file
• Create *.stories.tsx for Storybook
• Use semantic colors for monetary values (see AGENTS.md)
• Verify Storybook: pnpm --filter @mf-dashboard/web test:storybook

Component Types

1. Pure UI Components (components/charts/ or components/ui/)

Data-agnostic, reusable components. Receive all data via props.

// components/charts/my-chart.tsx
"use client";

interface MyChartProps {
  data: Array<{ label: string; value: number }>;
  // ... props only, no data fetching
}

export function MyChart({ data }: MyChartProps) {
  return (/* pure rendering */);
}

2. Data-Fetching Components (components/info/)

IMPORTANT: Only create .client.tsx when interactivity is required (useState, useEffect, event handlers, etc.). If the component only displays data, keep it as a Server Component.

Server Component Only (no interactivity)

// components/info/my-info.tsx
import { getMyData } from "../../lib/queries";

export function MyInfo() {
  const data = getMyData();
  return (
    <Card>
      <CardHeader>
        <CardTitle>My Info</CardTitle>
      </CardHeader>
      <CardContent>{/* render data */}</CardContent>
    </Card>
  );
}

With Client Component (interactivity required)

// components/info/my-info.tsx
import { getMyData } from "../../lib/queries";
import { MyInfoClient } from "./my-info.client";

export function MyInfo() {
  const data = getMyData();
  return <MyInfoClient data={data} />;
}

// components/info/my-info.client.tsx
"use client";

interface MyInfoClientProps {
  data: MyData;
}

export function MyInfoClient({ data }: MyInfoClientProps) {
  const [state, setState] = useState(/* ... */);
  return (/* interactive UI */);
}

File Locations

• Pure charts: apps/web/src/components/charts/
• UI primitives: apps/web/src/components/ui/
• Data-fetching: apps/web/src/components/info/
• Queries: apps/web/src/lib/queries.ts

Storybook Template

// components/info/my-info.stories.tsx
import type { Meta, StoryObj } from "@storybook/react";
import { MyInfoClient } from "./my-info.client";

const meta = {
  component: MyInfoClient,
} satisfies Meta<typeof MyInfoClient>;

export default meta;
type Story = StoryObj<typeof meta>;

export const Default: Story = {
  args: {
    data: {
      // mock data here
    },
  },
};

Semantic Colors (MUST use)