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How do you implement lazy loading for images in a React app?

Asked on Dec 20, 2025

Answer

Lazy loading images in a React app can significantly improve performance by deferring the loading of images until they are needed. This can be achieved using the `loading="lazy"` attribute in HTML5 or by utilizing libraries like `react-lazyload` or `IntersectionObserver` API for more control.

<!-- BEGIN COPY / PASTE -->
    import React from 'react';

    const LazyImage = ({ src, alt }) => (
      <img src={src} alt={alt} loading="lazy" />
    );

    export default LazyImage;
    <!-- END COPY / PASTE -->

Additional Comment:

Using the `loading="lazy"` attribute is the simplest method and is natively supported in modern browsers.
For more advanced scenarios, consider using the `IntersectionObserver` API to implement custom lazy loading logic.
Libraries like `react-lazyload` offer additional features such as placeholders and fade-in effects.
Ensure that your images have width and height attributes to prevent layout shifts.

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Ask any question about Web Development here... and get an instant response.

How do you implement lazy loading for images in a React app?

Asked on Dec 20, 2025

Answer

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