

I would go as far as saying that this should be integrated in modules/resize/resize.js as a replacement for window's resize event when ResizeObserver is available. It leverages events from the MutationObserver module (observer.js) to trigger onResize core handler. Use with e() and updateOnWindowResize: false. If (!('ResizeObserver' in window)) return Ĭonst observer = new ResizeObserver((entries) => ) Ĭbug(``) This clearly breaks proper slide sizing which uses Swiper's internal methods updateSize() and updateSlides().Ĭbug(` container=`, container) async "below-the-fold" CSS is loaded and resizes.swiper-container becomes visibile and swiper is initialized via IntersectionObserver browser loads swiper via ES modules (deferred).swiper loaded "below-the-fold", then lazy initialize it using IntersectionObserver as even async styles are likely to have been loaded at this point. swiper-container's style should already be loaded and therefore there would be no problem. One reason to NOT implement the ResizeObserver API would be that if the slider is shown above-the-fold, then all. async CSS is loaded that changes the size of.


When some size property changes values it means element size changed. The easiest way is to check element size in some time intervals. It means we need to have some own solution to do it.

In this short article, we would like to show how to monitor size changes of div (or any element) in pure JavaScript.īy default, there are no built-in events that monitor element resize events.
