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How can I implement lazy loading for images to improve site performance?
Asked on Jan 14, 2026
Answer
Lazy loading images can significantly enhance site performance by deferring the loading of images until they are needed, typically when they enter the viewport. This technique reduces initial page load time and bandwidth usage. You can implement lazy loading using native browser support with the `loading` attribute or JavaScript libraries for more control.
<!-- BEGIN COPY / PASTE -->
<!-- Native lazy loading with the loading attribute -->
<img src="image.jpg" alt="Description" loading="lazy">
<!-- END COPY / PASTE -->Additional Comment:
- Native lazy loading is supported in most modern browsers, making it a simple and effective solution.
- For older browsers, consider using a JavaScript library like LazyLoad or implementing Intersection Observer API for more control.
- Ensure that images have appropriate `alt` attributes for accessibility.
- Test lazy loading implementation to verify that images load as expected when they come into view.
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