Faster first paint
The browser can focus on above-the-fold assets first.
Lazy Load Images
Use lazy loading, placeholders, and responsive image sources so media-heavy pages stay fast while still looking polished.
Lazy Load Images
Section titled “Lazy Load Images”This tour helps you think about image performance as part of the page design itself. In Wappler, lazy loading is not only about turning on a feature. It is about deciding which images deserve immediate attention, which ones can wait, and how to preserve perceived quality while the page stays fast.
Why lazy loading matters
Section titled “Why lazy loading matters”Image-heavy pages often feel slow because too many assets compete for the first render. Lazy loading helps you prioritize the images users need immediately and delay the rest until they are likely to be seen.
Less bandwidth waste
Users do not download every image before they need it.
Better long pages
Large galleries and content pages stay more responsive.
Prioritize the first screen
Delay media below the fold
Measure whether the page feels faster, not just lighter
Responsive images still matter
Section titled “Responsive images still matter”Lazy loading does not replace responsive image strategy. Use the right source sizes for the layout so mobile devices do not download desktop-sized imagery unnecessarily.
Use srcset or responsive image variants when available
Match image dimensions to the real layout
Treat lazy loading and responsive sizing as complementary
Patterns that hold up in production
Section titled “Patterns that hold up in production”The best lazy-loading results come from combining performance choices with good visual fallbacks.
Use placeholders to protect layout stability
Section titled “Use placeholders to protect layout stability”A page feels broken when content jumps as images arrive. Reserve space with dimensions, placeholders, or container structure so the layout stays calm while assets load.
Stable layout
Prevent large jumps while images appear.
Preview state
Use placeholders or low-detail previews where appropriate.
Predictable rhythm
The page should remain readable before full media arrives.
Reserve image space early
Use placeholders only when they help orientation
Prefer calm loading over flashy loading
Choose what not to lazy load
Section titled “Choose what not to lazy load”Hero images, logos, or the first key visual on the page often need to load immediately. The goal is not to lazy load everything. The goal is to delay only what is not yet important to the user.
important: Avoid lazy loading critical above-the-fold media that defines the first impression of the page.
Load critical hero media eagerly
Delay long-tail galleries and article imagery
Test first-view content on slower connections
Verify the whole page experience
Section titled “Verify the whole page experience”A lazy-loaded page is only successful if users still understand the page immediately. Check the first viewport, scroll behavior, and how captions or linked actions appear while images are still arriving.
Check first viewport clarity
Scroll through on desktop and mobile
Make sure image-linked actions stay usable
Wrap-up
Section titled “Wrap-up”Continue into galleries or motion once your image loading strategy is solid.
Next steps
Section titled “Next steps”Choose a related media tour to continue.