export const metadata = { title: admin-component-must-be-arrow-function - ESLint plugin rules, }

{metadata.title}

This rule requires admin widget and UI route components to be arrow functions, not function declarations.

Severity

error. This rule is enabled in the recommended preset.

What it Targets

This rule targets files in your project's src/admin/widgets directory and page.tsx files in your project's src/admin/routes directory. It reports a default-exported component that's declared as a function declaration.

The following code is reported by the rule:

export default function MyWidget() {
  return null
}

Instead, declare the component as an arrow function:

const MyWidget = () => {
  return null
}

export default MyWidget

Why it's Important

Medusa only picks up admin widget and UI route components declared as arrow functions. Declaring them as function declarations causes them not to be registered, which can lead to runtime errors.

Learn more in the Admin Development Constraints documentation.

Fixable

This rule is auto-fixable. Run the linter with the --fix option to apply the fix automatically.