How to fix Suspense boundary was not provided a fallback component in React

ReactBEGINNERMEDIUM

This error occurs when you create a React Suspense component without providing the required fallback prop. The fallback prop is mandatory for Suspense to work properly, as it specifies what UI to display while child components are loading or suspending.

What this error means

This error indicates that a `<Suspense>` component has been created without the required `fallback` prop. In React, the Suspense component is designed to handle loading states for components that suspend during rendering, such as lazy-loaded components or components fetching data with Suspense-enabled libraries. The `fallback` prop is essential because it defines what UI should be displayed while the suspended component is loading. Without it, React doesn't know what to render during the loading period, resulting in this error. The fallback can be any valid React element, typically a loading spinner, skeleton screen, or placeholder text. This error commonly appears when using `React.lazy()` for code splitting, when components use Suspense-enabled data sources like React Query or SWR, or in Next.js applications where certain hooks like `useSearchParams()` require Suspense boundaries.

How to fix "Suspense boundary was not provided a fallback component"

1Add a fallback prop to your Suspense component

The simplest fix is to add a fallback prop with a loading UI:

jsx

import { Suspense } from 'react';

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <LazyComponent />
    </Suspense>
  );
}

The fallback can be any valid React element. Common patterns include loading spinners, skeleton screens, or simple text.

2Use a loading spinner or skeleton component for better UX

Instead of plain text, provide a more polished loading experience:

jsx

import { Suspense } from 'react';

function LoadingSpinner() {
  return (
    <div className="spinner-container">
      <div className="spinner" />
    </div>
  );
}

function App() {
  return (
    <Suspense fallback={<LoadingSpinner />}>
      <LazyComponent />
    </Suspense>
  );
}

For even better UX, use skeleton screens that mimic the layout of the content being loaded.

3Wrap lazy-loaded components with Suspense

When using React.lazy(), always wrap the component in Suspense:

jsx

import { lazy, Suspense } from 'react';

const LazyComponent = lazy(() => import('./LazyComponent'));

function App() {
  return (
    <Suspense fallback={<div>Loading component...</div>}>
      <LazyComponent />
    </Suspense>
  );
}

You can wrap multiple lazy components with a single Suspense boundary, and they will all share the same fallback UI.

4For Next.js apps, wrap client-side hooks with Suspense

In Next.js, hooks like useSearchParams() require Suspense boundaries:

jsx

'use client';

import { Suspense } from 'react';
import { useSearchParams } from 'next/navigation';

function SearchParamsComponent() {
  const searchParams = useSearchParams();
  return <div>{searchParams.get('query')}</div>;
}

export default function Page() {
  return (
    <Suspense fallback={<div>Loading search...</div>}>
      <SearchParamsComponent />
    </Suspense>
  );
}

This is required because these hooks can cause client-side rendering bailouts that need proper loading states.

5Verify fallback is provided when nesting Suspense boundaries

When using nested Suspense components, ensure each one has a fallback:

jsx

function App() {
  return (
    <Suspense fallback={<div>Loading page...</div>}>
      <Header />
      <Suspense fallback={<div>Loading content...</div>}>
        <Content />
      </Suspense>
      <Footer />
    </Suspense>
  );
}

This creates granular loading states where different parts of your UI can load independently, providing better perceived performance.

How to fix Suspense boundary was not provided a fallback component in React

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