Mobile First vs Desktop Fallback'''mobile-first, it's not just a buzzword - it's faster! When you start with smaller screens in mind:
- '''less CSS
@media (min-width: 768px) { /'' desktop styles ''/ }vs
body, html {margin:0;padding-top :4rem;}CSS Grid for LayoutsGrid is your secret weapon! No more floating divs and clearfix hacks. Just define columns in CSS:
<div class="grid-container"><!-- items -->
And the magic happens with
. grid {display: grid;gap :1rem;grid-template-columns :repeat(auto-fit, minmax(20em, auto));}Lazy Loading Images<img src="image. jpg" loading=lazy>
Saves bandwidth and speeds up page load times. Perfect for images that aren't in the viewport initially.
Don't forget to test on real devices!Use your smartphone or tablet, not just desktop browsers - real-world testing reveals issues early. Remember:
Test Early Test Often ⬆