What is 'preloading' in the context of code splitting?
In the context of code splitting, preloading is a technique that tells the browser to load resources that will be needed soon, but not immediately. For example, you might preload a code chunk when a user hovers over a button that will require that chunk when clicked. This can be implemented by triggering the dynamic import early but not using the result yet, or through resource hints like <link rel="preload">. Preloading improves perceived performance by starting to load resources before they're explicitly needed, making interactions feel more responsive.