Canceling HTTP requests in Vue prevents unnecessary network usage, avoids race conditions, and improves application performance when components unmount or routes change. As the creator of CoreUI with extensive Vue.js experience since its early versions, I’ve implemented request cancellation in numerous data-driven applications and component libraries. From my expertise, the most effective approach is using AbortController with the Composition API to automatically cancel requests on component cleanup. This technique ensures clean component lifecycle management and prevents memory leaks from pending requests.