Using the CSS contain property: A deep dive

CSS containment, represented by the CSS contain property, is a web standard aimed at enhancing webpage performance by allowing browsers to treat specific elements as independent from the rest of the page. This optimization technique involves creating virtual boundaries around elements to improve rendering efficiency, focusing on four main containment types: layout, paint, size, and style. By employing these containments, developers can reduce the impact of element changes on the overall webpage, thereby improving load times and user experiences, especially in dynamic content scenarios. The tutorial emphasizes the importance of understanding browser processes, like layout calculations, painting, and reflow, to effectively implement CSS containment for performance gains. Practical examples demonstrate how containment can prevent layout shifts, optimize animations, and improve the handling of hidden elements, though the benefits may vary based on the application size. Despite its potential, CSS containment is not universally adopted, but its support across major browsers suggests a promising future for broader use in performance optimization strategies.