<ul><li>Code splitting divides application into smaller chunks to optimize bundle size.</li><li>Splitting by page is a common approach improving initial load time.</li><li>However, navigation delays can occur between pages.</li><li>Preloading is introduced to load code before user requests, reducing navigation delays.</li><li>Challenges include determining what to preload and when to preload it.</li><li>Various preloading strategies exist, such as mouseover-based and viewport-based.</li><li>Timing challenges include preloading too early or too late.</li><li>Browsers provide limited APIs for designing smart preloading.</li><li>Declarative navigation is crucial for effective preloading.</li><li>Legacy codebases with imperative navigation may face difficulties in implementing preloading.</li><li>Different frameworks have varying levels of support for preloading strategies.</li></ul>

The Truth About Preloading in Modern Web

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