Lazy-load images
Forces loading=lazy and async decoding on every image to save bandwidth and memory.
Code to copy
// Add native lazy loading and async decoding to every image.
function lazify() {
document.querySelectorAll('img').forEach(function (img) {
try {
if (!img.loading || img.loading === 'auto') img.loading = 'lazy';
img.decoding = 'async';
} catch (e) {}
});
}
lazify();
new MutationObserver(lazify).observe(document.documentElement, {
childList: true, subtree: true
});How to use this example
- Copy the code with the button above.
- Install JustZix (2 minutes) and open the extension on the target page.
- Add a new rule matching that page.
- Paste the code into the rule's JavaScript panel and save — it runs on every page visit.
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