web performance optimization Lazy Load JavaScript[s] my idea of lazy loading javascript files - like you already do with images and iframes…
frontend WebP image and background usage in web projects UPDATE: I was late at the image-set party, please read this blog post, how to support avif and webp images in your project.With Firefox 65 joining the WebP party and thanks to
plain js javascript - choosing the right timeout is easy Every once in awhile I see code that debounces expensive events like resize or scroll: someTimeout = window.setTimeout(debounceScroll, 10); and I wonder about the magic numbers, developers choose. magic numbers In the
js jquery event delegation in plain js When you add an event handler, do you delegate it? Thanks to jQuery, I do. jQuery 1.3 shipped a function called .live() with which you could add event handlers for elements, that