Page 8 - Vue.js

Hydration mismatches in Vue and Nuxt are among the most frustrating debugging experiences in SSR development. The browser console shows "Hydration completed but contains mismatches," the UI flickers, and the error is hard to reproduce. This article explains the causes systematically and shows how to fix them for good.

With defineCustomElement(), any Vue component can be turned into a real, standards-compliant custom element that behaves like a native HTML element in any environment, even one that does not use Vue itself. This article walks through the API in detail, how Shadow DOM encapsulation prevents styling conflicts, and where the limitations compared to a normal Vue component lie.

Vue memory leaks almost always originate in the same three places: forgotten event listeners, timers that never get stopped, and watchers without cleanup when a component unmounts. Chrome devtools heap snapshots let you confirm any suspicion with solid evidence, instead of changing code based on guesswork that does not even touch the actual leak.

Nuxt modules are the tool for extending the build process, the runtime, and even the developer tooling of a Nuxt project. In this article we build a module step by step that hooks into the build process, ships typed options, and finally registers its own tab in Nuxt DevTools.

Code reviews in Vue teams rarely fail because of a lack of willingness, they fail because of a missing framework. Without clear criteria, reviews turn into subjective style debates instead of real quality checks. This article shows which review patterns actually matter, from component design through reactivity mistakes to Pinia store quality and TypeScript integration.

A big-bang rewrite fails more often than it succeeds. The better strategy: introduce Vue step by step into existing PHP monoliths, Twig templates, and jQuery applications, island by island, without interrupting ongoing operations.

Measuring Web Vitals in a single page application is not trivial, because classic metrics were designed for server rendered multi page websites. With the web-vitals library, correct timing and true real user monitoring, LCP, INP and CLS can be reliably captured in Vue apps as well.

Anyone who builds Vue projects without a well-thought-out file structure ends up fighting unclear ownership and circular dependencies by the time a second developer joins. Feature-based Vue architecture with clearly defined layers and composables as its core solves this problem structurally, before it slows down everyday work.

Vue transitions are powerful, but full of hidden traps. A wrongly chosen CSS property triggers layout reflow and makes the animation stutter. A missing key change lets elements disappear without the transition ever firing. This article explains how Vue transitions actually work, which CSS properties run smoothly, and which patterns reliably deliver beautiful animations in practice.

Copy-paste between Vue components is a silent maintenance problem: when the same fetch logic, the same validation code, or the same scroll behavior is duplicated across ten components, you end up with a system that has to be touched ten times for every bug fix. Vue Composables solve this problem structurally by encapsulating reactive logic in useX functions that snap together like building blocks.