[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"contentNavigation":3,"source-jakub-andrzejewski":4,"newsletter-stats":12,"articles-feed-\u002Fsources\u002Fjakub-andrzejewski-1--019d6bd6-7fe0-7244-80dc-9a4e8751886a":14,"$fQa3xUpnRDPNiFFu2QS4K-DAjYmsapeR9fNhPNBdpkOc":-1,"home-tags":182},[],{"articleCount":5,"category":6,"id":7,"name":8,"slug":9,"sourceType":10,"url":11},7,null,"019d6bd6-7fe0-7244-80dc-9a4e8751886a","Jakub Andrzejewski","jakub-andrzejewski","rss","https:\u002F\u002Fdev.to\u002Fjacobandrewsky",{"confirmedCount":13},409,{"items":15,"page":180,"pageSize":181,"totalCount":5},[16,47,71,92,116,136,158],{"content":17,"createdAt":18,"id":19,"image":20,"isAffiliate":21,"isPublished":22,"publishedAt":23,"slug":24,"sourceId":7,"sourceName":8,"sourceType":10,"summary":25,"title":26,"updatedAt":27,"url":28,"urlHash":29,"tags":30},"As Vue applications grow, keeping the codebase clean becomes increasingly challenging. At first, everyone follows the same conventions. But over time, you start noticing things like: inconsistent component structure multiple ways of solving the same problem different Composition API patterns imports scattered everywhere code that's difficult to review and maintain This is where ESLint becomes much more than a tool for formatting—it becomes a way to enforce your project's architecture and design patterns. In this article, we'll explore: Why ESLint is more than a linter How it helps maintain a consistent architecture Useful Vue-specific rules Examples of enforcing project-wide patterns Best practices for scaling Vue applications Let's dive in. 🤔 ESLint Is More Than a Code Formatter Many developers think ESLint is only used to catch things like; unused variables, missing semicolons, incorrect formatting. While that's true, ESLint can do much more. With the right configuration, it can enforce: coding conventions project architecture Vue best practices Composition API patterns import organization component structure Instead of relying on code reviews to catch inconsistencies, ESLint prevents them before the code is even merged. 🟢 What Problem Does It Solve? Imagine a team of five developers. One component looks like this: <script setup> ... <\u002Fscript> <template> ... <\u002Ftemplate> <style> ... <\u002Fstyle> Another one: <template> ... <\u002Ftemplate> <script setup> ... <\u002Fscript> Someone uses: watch() Someone else always prefers: watchEffect() Some developers use relative imports: ..\u002F..\u002F..\u002Fcomponents\u002FButton.vue Others use aliases: ~\u002Fcomponents\u002FButton.vue None of these are necessarily wrong... but together they create inconsistency across the project. ESLint helps eliminate these differences by enforcing one agreed-upon way of writing code. 🟢 Enforcing Vue Block Order One of the simplest examples is keeping Vue Single File Components organized. Using the vue\u002Fblock-order rule, you can define the exact order of blocks. Example: <template> ... <\u002Ftemplate> <script setup lang=\"ts\"> ... <\u002Fscript> <style scoped> ... <\u002Fstyle> 🟢 Enforcing Composition API Patterns One of the biggest advantages of ESLint is enforcing how developers use Vue APIs. For example, you might decide that your project should always use: <script setup> Composition API defineProps defineEmits And avoid Options API or inconsistent component definitions. This ensures new components follow the same architecture from day one. 🟢 Restricting Specific APIs Sometimes you want to discourage certain patterns altogether. For example, you may decide: ❌ Avoid watch() unless absolutely necessary. Prefer: computed() or watchEffect() ESLint can restrict the use of specific APIs and encourage better alternatives. This keeps reactive logic predictable and easier to maintain. 🟢 Enforcing Import Conventions Large Vue projects often suffer from inconsistent imports. Example: import Button from '..\u002F..\u002F..\u002Fcomponents\u002FButton.vue' vs. import Button from '~\u002Fcomponents\u002FButton.vue' ESLint can enforce: path aliases import ordering grouped imports no duplicate imports The result is cleaner and more consistent code. 🟢 Preventing Architectural Violations ESLint can also help enforce architectural boundaries. For example: Components shouldn't access API clients directly. Feature modules shouldn't import from other features. UI components shouldn't depend on business logic. Using rules such as no-restricted-imports, you can prevent these patterns entirely. Example: 'no-restricted-imports': [ 'error', { patterns: [ '@\u002Fapi\u002F*' ] } ] Now components can't accidentally bypass your intended architecture. 🟢 Creating Custom Rules for Your Team One of ESLint's greatest strengths is extensibility. Beyond built-in rules, you can create custom rules—or use plugins—to enforce project-specific conventions. For example: composables must start with use stores must live in a dedicated folder feature modules cannot import each other utility functions must remain pure internal design system components must be used instead of native HTML elements As your project grows, these automated checks become far more reliable than relying solely on code reviews. 🟢 Why This Matters in Large Vue Applications Small projects can survive without strict rules. Large projects usually can't. Consistency helps: onboard new developers faster simplify code reviews reduce technical debt prevent architectural drift improve long-term maintainability Instead of debating coding style in every pull request ESLint enforces it automatically. 🧪 Best Practices Treat ESLint as an architecture tool—not just a linter Enable Vue-specific rules from eslint-plugin-vue Agree on project conventions early Enforce Composition API patterns consistently Use no-restricted-imports to protect architectural boundaries Automate linting in CI\u002FCD pipelines Keep rules practical—avoid overcomplicating your configuration 📖 Learn more If you would like to learn more about Vue, Nuxt, JavaScript or other useful technologies, checkout VueSchool by clicking this link or by clicking the image below: It covers most important concepts while building modern Vue or Nuxt applications that can help you in your daily work or side projects 😉 🧪 Advance skills A certification boosts your skills, builds credibility, and opens doors to new opportunities. Whether you're advancing your career or switching paths, it's a smart step toward success. Check out Certificates.dev by clicking this link or by clicking the image below: Invest in yourself—get certified in Vue.js, JavaScript, Nuxt, Angular, React, and more! ✅ Summary ESLint is much more than a tool for catching syntax errors or enforcing formatting. As Vue applications grow, consistency becomes just as important as functionality. By using ESLint to enforce architectural decisions, you ensure that every new piece of code follows the same standards—making your project easier to understand, review, and maintain for years to come. Take care! And happy coding as always 🖥️","2026-07-06T12:00:09.479Z","019f374c-d2f0-769a-8a4f-180c7f565bd4","https:\u002F\u002Fmedia2.dev.to\u002Fdynamic\u002Fimage\u002Fwidth=1200,height=627,fit=cover,gravity=auto,format=auto\u002Fhttps%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fevhhwr5be00v4h9dmmxi.png",false,true,"2026-07-06T08:38:53.000Z","enforce-better-vue-architecture-with-eslint","This article discusses how ESLint can be leveraged to enforce a consistent architecture and coding standards in Vue applications. It highlights the importance of using ESLint beyond formatting, showcasing its ability to maintain project-wide patterns, improve code review processes, and ensure best practices in Vue development, particularly with the Composition API.","Enforce Better Vue Architecture with ESLint","2026-07-06T12:00:24.181Z","https:\u002F\u002Fdev.to\u002Fjacobandrewsky\u002Fenforce-better-vue-architecture-with-eslint-3fb0","5987f1e0425bcd09cd7e156b69730144717e56a57baa8243a9f5f2c7670170ef",[31,35,38,41,44],{"color":32,"id":33,"name":34,"slug":34},"#10b981","019d6bd8-c9a8-7783-bd22-03145b355427","vue",{"color":32,"id":36,"name":37,"slug":37},"019f374d-0cc4-71ff-b906-ebaec8b0c343","eslint",{"color":32,"id":39,"name":40,"slug":40},"019d6bd8-ca21-71c5-a236-37d94fe57d24","composition-api",{"color":32,"id":42,"name":43,"slug":43},"019d9cf0-ca04-75bb-ad86-ce8da1c0be23","architecture",{"color":32,"id":45,"name":46,"slug":46},"019d6bd9-010e-772d-b2f0-9378a042a676","best-practices",{"content":48,"createdAt":49,"id":50,"image":51,"isAffiliate":21,"isPublished":22,"publishedAt":52,"slug":53,"sourceId":7,"sourceName":8,"sourceType":10,"summary":54,"title":55,"updatedAt":56,"url":57,"urlHash":58,"tags":59},"Performance has become one of the most important aspects of modern frontend development. Users expect websites to be fast and Google rewards fast websites. And yet... even experienced Vue developers still introduce performance issues that can significantly impact user experience. The tricky part? Most applications work perfectly fine during development. Problems usually appear later: larger datasets slower devices poor network conditions increased application complexity In this article, we'll look at 10 common Vue performance mistakes I still see in production applications and how to fix them. Let's dive in. 🤔 Why Vue Performance Matters Vue is already a highly optimized framework. However, even the best framework cannot compensate for inefficient application code. Poor performance can lead to: slow page loads delayed interactions poor Core Web Vitals scores increased battery usage frustrated users The good news? Most performance issues can be fixed with relatively small changes. 🟢 Mistake #1: Using Deep Watchers Everywhere A common mistake is enabling deep watchers on large objects. Example: watch( userData, () => { saveDraft() }, { deep: true } ) Deep watchers force Vue to traverse the entire object tree. For large datasets this can become very expensive. Instead: watch specific properties split large objects use computed values when possible 🟢 Mistake #2: Making Everything Reactive Not every piece of data needs reactivity. I often see code like this: const hugeDataset = ref(largeArray) When the data rarely changes, Vue still needs to create reactive proxies. For large collections this introduces unnecessary overhead. A better approach: const hugeDataset = shallowRef(largeArray) Or even: const hugeDataset = markRaw(largeArray) when reactivity isn't needed at all. 🟢 Mistake #3: Creating New Objects Inside Computed Properties Consider this: const userInfo = computed(() => ({ name: user.value.name, role: user.value.role })) A brand-new object is created every time the computed runs. This can trigger unnecessary component updates. Instead, prefer returning primitives when possible or memoizing expensive transformations. 🟢 Mistake #4: Using v-if Instead of v-show for Frequently Toggled Elements Many developers use: <div v-if=\"isOpen\"> Content <\u002Fdiv> But if the element is shown and hidden frequently, Vue must repeatedly: mount render destroy A better option: <div v-show=\"isOpen\"> Content <\u002Fdiv> This simply toggles CSS visibility. For frequently toggled UI elements, it's usually much faster. 🟢 Mistake #5: Rendering Huge Lists Without Virtualization Rendering thousands of DOM nodes is expensive. Example: <div v-for=\"user in users\" :key=\"user.id\" > {{ user.name }} <\u002Fdiv> This might work with 100 items. It won't feel great with 10,000. Instead consider: virtual scrolling pagination infinite loading Libraries like Vue Virtual Scroller can dramatically improve performance. 🟢 Mistake #6: Lazy Loading Nothing Many applications ship their entire codebase on the first page load. Example: import UserSettings from '.\u002FUserSettings.vue' This increases: bundle size download time parse time Instead: const UserSettings = defineAsyncComponent( () => import('.\u002FUserSettings.vue') ) Users only download code when it's actually needed. 🟢 Mistake #7: Fetching Data Sequentially A surprisingly common issue: const users = await fetchUsers() const posts = await fetchPosts() const comments = await fetchComments() Each request waits for the previous one. A faster approach: const [users, posts, comments] = await Promise.all([ fetchUsers(), fetchPosts(), fetchComments() ]) This can reduce loading times significantly. 🟢 Mistake #8: Forgetting About Image Optimization Images are often the largest assets on a page. Yet many applications still serve: oversized images uncompressed formats images outside the viewport For Vue and Nuxt applications: use WebP or AVIF lazy load images generate responsive sizes Image optimization frequently provides the biggest performance wins. 🟢 Mistake #9: Ignoring Component Re-Renders A component may render far more often than expected. For example: <ExpensiveChart :data=\"chartData\" \u002F> If chartData changes reference on every update, the chart keeps re-rendering. Common solutions: stabilize references use shallowRef avoid unnecessary reactive updates profile components with Vue DevTools Small changes here can have a huge impact. 🟢 Mistake #10: Never Measuring Performance The biggest mistake? Not measuring anything. Many teams optimize blindly. Instead, regularly check: Lighthouse Core Web Vitals Vue DevTools Chrome Performance Panel Network waterfalls Performance work should be data-driven. You can't improve what you don't measure. 🟢 Performance Checklist Before shipping a Vue application, ask yourself: ✅ Am I using deep watchers only when necessary? ✅ Do all objects really need reactivity? ✅ Are large lists virtualized? ✅ Are routes and components lazy loaded? ✅ Are API requests running in parallel? ✅ Are images optimized? ✅ Have I measured actual performance? If any answer is \"no\", there may be easy performance wins available. 🧪 Best Practices Use shallowRef for large datasets Avoid deep watchers whenever possible Lazy load routes and heavy components Virtualize large lists Optimize images aggressively Profile real-world user flows Monitor Core Web Vitals Measure before and after every optimization 📖 Learn more If you would like to learn more about Vue, Nuxt, JavaScript or other useful technologies, checkout VueSchool by clicking this link or by clicking the image below: It covers most important concepts while building modern Vue or Nuxt applications that can help you in your daily work or side projects 😉 🧪 Advance skills A certification boosts your skills, builds credibility, and opens doors to new opportunities. Whether you're advancing your career or switching paths, it's a smart step toward success. Check out Certificates.dev by clicking this link or by clicking the image below: Invest in yourself—get certified in Vue.js, JavaScript, Nuxt, Angular, React, and more! ✅ Summary Vue is fast by default. But performance problems often come from how we use the framework rather than the framework itself. In this article, you learned: 10 common Vue performance mistakes Why they impact real-world applications How to identify them Practical ways to fix them Best practices for building faster Vue apps Many of these issues are easy to overlook during development but become expensive at scale. By avoiding these mistakes and measuring performance regularly, you can build applications that feel fast, responsive, and enjoyable to use. Take care! And happy coding as always 🖥️","2026-06-15T08:00:09.697Z","019eca4b-8dce-754e-ad17-a0f9b1aef338","https:\u002F\u002Fmedia2.dev.to\u002Fdynamic\u002Fimage\u002Fwidth=1200,height=627,fit=cover,gravity=auto,format=auto\u002Fhttps%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fidhps7seqfikj9j24oz3.png","2026-06-15T07:08:48.000Z","10-vue-performance-mistakes-i-still-see-in-production-apps","This article discusses ten common performance mistakes that Vue developers often make in production applications, highlighting issues such as using deep watchers unnecessarily and making everything reactive. It emphasizes the importance of optimizing performance to enhance user experience and offers practical solutions to improve application efficiency.","10 Vue Performance Mistakes I Still See in Production Apps","2026-06-15T08:00:29.794Z","https:\u002F\u002Fdev.to\u002Fjacobandrewsky\u002F10-vue-performance-mistakes-i-still-see-in-production-apps-52a1","4bad7a0b92210da78523e2dbba139490f2eade4aa9b344635bb1bb7b69b6959a",[60,61,64,67,70],{"color":32,"id":33,"name":34,"slug":34},{"color":32,"id":62,"name":63,"slug":63},"019d6bd8-ca26-775c-b9b5-c3439dbe5789","performance",{"color":32,"id":65,"name":66,"slug":66},"019e3af5-4a35-705c-8ab1-4404b653e0e8","optimization",{"color":32,"id":68,"name":69,"slug":69},"019daac3-2f85-7393-b891-9da3891267ca","reactivity",{"color":32,"id":45,"name":46,"slug":46},{"content":72,"createdAt":73,"id":74,"image":75,"isAffiliate":21,"isPublished":22,"publishedAt":76,"slug":77,"sourceId":7,"sourceName":8,"sourceType":10,"summary":78,"title":79,"updatedAt":80,"url":81,"urlHash":82,"tags":83},"As frontend applications become more complex, debugging production issues becomes increasingly difficult. A user reports: \"The page feels slow.\" or: \"The dashboard sometimes freezes.\" But when you check your logs... everything looks fine. The problem is that traditional frontend monitoring often tells you what failed, but not why it happened. This is where observability comes in. And one of the most popular tools for modern observability is OpenTelemetry. In this article, we'll explore: What frontend observability is How it differs from traditional monitoring Why OpenTelemetry is becoming the industry standard How to add OpenTelemetry to a Vue application Best practices for collecting useful telemetry Let's dive in. 🤔 What Is Frontend Observability? Observability is the ability to understand what's happening inside your application by collecting telemetry data. Typically, this includes: traces metrics logs Unlike traditional monitoring, observability helps answer questions like: Why is this page slow? Which API request caused the delay? What happened before the error occurred? Which users are affected? Instead of simply knowing that something failed... 👉 You can understand the entire chain of events that led to the problem. 🟢 Why Is Frontend Observability Important? Most teams invest heavily in backend observability. They track: database queries API latency server errors infrastructure metrics But users interact with the frontend. And many issues happen before the request even reaches the backend. For example: slow component rendering blocked main thread failed network requests routing issues third-party script delays Without frontend observability these problems are often invisible. 🟢 What Is OpenTelemetry? OpenTelemetry (often called OTel) is an open-source observability framework used to collect and export telemetry data. It provides a standard way to collect: traces metrics logs And send them to tools such as: Grafana Jaeger Datadog New Relic Honeycomb Elastic The biggest advantage? Vendor-neutral instrumentation. You can change observability providers without rewriting your instrumentation. 🟢 How OpenTelemetry Helps Vue Applications Imagine a user loads a dashboard. Several things happen: Route change ↓ Component mounts ↓ API request starts ↓ Data is fetched ↓ UI renders Normally these events are disconnected. With OpenTelemetry you can trace the entire flow. This helps answer questions like: Which API call slowed down the page? How long did rendering take? Which routes are causing performance issues? 🟢 Setting Up OpenTelemetry in Vue Let's look at a simplified setup. Install the required packages: npm install \\ @opentelemetry\u002Fapi \\ @opentelemetry\u002Fsdk-trace-web \\ @opentelemetry\u002Finstrumentation-fetch \\ @opentelemetry\u002Finstrumentation-xml-http-request Basic initialization import { WebTracerProvider } from '@opentelemetry\u002Fsdk-trace-web' const provider = new WebTracerProvider() provider.register() This creates a tracer that can collect telemetry from the browser. 🟢 Creating Custom Traces One of the most powerful features is custom tracing. Example: import { trace } from '@opentelemetry\u002Fapi' const tracer = trace.getTracer('vue-app') Inside a component: const span = tracer.startSpan('load-users') try { await fetchUsers() } finally { span.end() } Now you'll see exactly how long that operation took. This becomes extremely useful when debugging production issues. 🟢 Tracking Route Performance Vue Router is another excellent place to add tracing. Example: router.beforeEach((to, from, next) => { performance.mark('navigation-start') next() }) router.afterEach(() => { performance.measure( 'navigation', 'navigation-start' ) }) Combined with OpenTelemetry exporters, this can help identify slow routes and navigation bottlenecks. 🟢 Monitoring API Requests Many performance problems originate from network calls. OpenTelemetry provides automatic instrumentation for: Fetch API XMLHttpRequest Example: registerInstrumentations({ instrumentations: [ new FetchInstrumentation() ] }) Now requests can automatically generate traces. You can see: request duration failures dependencies between actions without manually instrumenting every API call. 🧪 Best Practices Instrument critical user flows first Trace important API requests Avoid collecting unnecessary telemetry Sample traces in high-traffic applications Correlate frontend traces with backend traces Monitor route transitions and rendering bottlenecks Focus on actionable insights rather than collecting everything 📖 Learn more If you would like to learn more about Vue, Nuxt, JavaScript or other useful technologies, checkout VueSchool by clicking this link or by clicking the image below: It covers most important concepts while building modern Vue or Nuxt applications that can help you in your daily work or side projects 😉 🧪 Advance skills A certification boosts your skills, builds credibility, and opens doors to new opportunities. Whether you're advancing your career or switching paths, it's a smart step toward success. Check out Certificates.dev by clicking this link or by clicking the image below: Invest in yourself—get certified in Vue.js, JavaScript, Nuxt, Angular, React, and more! ✅ Summary Frontend observability helps you understand not just what went wrong, but why it happened. As applications grow in complexity, logs and error tracking alone are often no longer enough. OpenTelemetry gives you deeper visibility into your Vue application, helping you identify bottlenecks, improve performance, and deliver a better user experience. Take care! And happy coding as always 🖥️","2026-06-08T12:00:03.683Z","019ea71a-ac51-7489-bbe0-07745fbb62d0","https:\u002F\u002Fmedia2.dev.to\u002Fdynamic\u002Fimage\u002Fwidth=1200,height=627,fit=cover,gravity=auto,format=auto\u002Fhttps%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fiajryi395e201bloufp6.png","2026-06-08T08:59:35.000Z","frontend-observability-in-vue-apps-with-opentelemetry","This article discusses the importance of frontend observability in Vue applications, emphasizing how traditional monitoring falls short in diagnosing performance issues. It introduces OpenTelemetry as a solution for collecting telemetry data, providing insights into application behavior and performance. The article also includes a guide on setting up OpenTelemetry in Vue apps to enhance observability.","Frontend Observability in Vue Apps with OpenTelemetry","2026-06-10T14:35:13.766Z","https:\u002F\u002Fdev.to\u002Fjacobandrewsky\u002Ffrontend-observability-in-vue-apps-with-opentelemetry-3fb0","c8c141c41435740358afc38ce5d160217a0beb69c216de4d15879d516b3259e9",[84,85,88,91],{"color":32,"id":33,"name":34,"slug":34},{"color":32,"id":86,"name":87,"slug":87},"019ea71a-dc95-72b8-a7e3-70f9e2ac3710","opentelemetry",{"color":32,"id":89,"name":90,"slug":90},"019ea71a-dc9d-7607-9cfa-df0f31ab5876","observability",{"color":32,"id":62,"name":63,"slug":63},{"content":93,"createdAt":94,"id":95,"image":96,"isAffiliate":21,"isPublished":22,"publishedAt":97,"slug":98,"sourceId":7,"sourceName":8,"sourceType":10,"summary":99,"title":100,"updatedAt":101,"url":102,"urlHash":103,"tags":104},"Animations can make an application feel faster, smoother, and more polished. However, many developers think animations are only useful for things like: page transitions modals enter\u002Fleave effects But Vue provides another powerful pattern - State-driven animations. Instead of animating when elements are added or removed from the DOM, you animate changes in reactive state. This allows you to create rich interactive experiences while keeping your code declarative and easy to maintain. In this article, we'll explore: What state-driven animations are How they differ from regular Vue transitions What problems they solve How to implement them in Vue Best practices for creating smooth UI interactions Let's dive in. 🤔 What Are State-Driven Animations? Most Vue developers are familiar with the <Transition> component. Example: <Transition> <Modal v-if=\"isOpen\" \u002F> <\u002FTransition> This animates an element when it enters or leaves the DOM. But what if the element already exists and only its state changes? For example: a progress bar grows a card expands a chart updates a panel changes size a value changes position This is where state-driven animations shine. Instead of animating DOM insertion or removal, you animate changes caused by reactive state. 🟢 What Problem Do State-Driven Animations Solve? Without animations, state changes can feel abrupt. Example: <div :style=\"{ width: progress + '%' }\"><\u002Fdiv> When progress changes: progress.value = 80 The width instantly jumps. This works technically... but it doesn't feel great. 🟢 A Simple Example Let's create an animated progress bar. <script setup lang=\"ts\"> const progress = ref(20) function increase() { progress.value += 20 } <\u002Fscript> <template> <button @click=\"increase\"> Increase Progress <\u002Fbutton> <div class=\"progress-container\"> <div class=\"progress-bar\" :style=\"{ width: `${progress}%` }\" \u002F> <\u002Fdiv> <\u002Ftemplate> CSS: .progress-container { width: 100%; height: 12px; background: #eee; } .progress-bar { height: 100%; background: #42b883; transition: width 0.3s ease; } Now whenever progress changes, the bar animates smoothly. The animation is entirely driven by reactive state. 🟢 Animating Multiple Properties State-driven animations are not limited to width. Example: <div class=\"card\" :style=\"{ transform: expanded ? 'scale(1.1)' : 'scale(1)', opacity: expanded ? 1 : 0.7 }\" \u002F> CSS: .card { transition: transform 0.3s ease, opacity 0.3s ease; } Now changing: expanded.value = true animates scale and opacity at the same time. 🟢 Using Vue Reactivity with Animations One of the biggest advantages is that animations stay connected to Vue's reactivity system. Example: <script setup lang=\"ts\"> const isActive = ref(false) <\u002Fscript> <template> <button @click=\"isActive = !isActive\"> Toggle <\u002Fbutton> <div class=\"box\" :class=\"{ active: isActive }\" \u002F> <\u002Ftemplate> CSS: .box { width: 100px; height: 100px; transition: all 0.4s ease; } .box.active { transform: rotate(180deg); } Vue handles state. CSS handles animation. The result is clean and maintainable. 🧪 Best Practices Keep animations subtle and purposeful Prefer CSS transitions for simple effects Avoid animating expensive properties when possible Use transforms instead of layout-changing properties when appropriate Don't animate everything Keep durations short (typically 200–400ms) Use animations to communicate state changes, not distract users 📖 Learn more If you would like to learn more about Vue, Nuxt, JavaScript or other useful technologies, checkout VueSchool by clicking this link or by clicking the image below: It covers most important concepts while building modern Vue or Nuxt applications that can help you in your daily work or side projects 😉 🧪 Advance skills A certification boosts your skills, builds credibility, and opens doors to new opportunities. Whether you're advancing your career or switching paths, it's a smart step toward success. Check out Certificates.dev by clicking this link or by clicking the image below: Invest in yourself—get certified in Vue.js, JavaScript, Nuxt, Angular, React, and more! ✅ Summary State-driven animations are a powerful way to create smooth and engaging user experiences in Vue. While <Transition> is perfect for entering and leaving elements, state-driven animations excel when existing elements need to react smoothly to changing data. Used thoughtfully, they can make your applications feel significantly more responsive and professional. Take care! And happy coding as always 🖥️","2026-06-01T12:00:05.566Z","019e830e-2fa7-74ed-8c74-71fc2c69cb52","https:\u002F\u002Fmedia2.dev.to\u002Fdynamic\u002Fimage\u002Fwidth=1200,height=627,fit=cover,gravity=auto,format=auto\u002Fhttps%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fvih3y2fdc8upo7ni9m42.png","2026-06-01T09:54:37.000Z","state-driven-animations-in-vue-create-smooth-ui-transitions-with-reactive-state","This article explores state-driven animations in Vue, highlighting how they enhance UI transitions by animating changes in reactive state rather than just DOM insertion or removal. It provides examples and best practices for implementing these animations to create smoother, more interactive user experiences.","State-Driven Animations in Vue: Create Smooth UI Transitions with Reactive State","2026-06-10T14:35:13.767Z","https:\u002F\u002Fdev.to\u002Fjacobandrewsky\u002Fstate-driven-animations-in-vue-create-smooth-ui-transitions-with-reactive-state-d3i","b6046ff3585c584d9e28b56411b296d962249089895ddbb6902902fabcfdafec",[105,106,109,110,113],{"color":32,"id":33,"name":34,"slug":34},{"color":32,"id":107,"name":108,"slug":108},"019e830e-5378-722b-929b-a57d67bcf605","animation",{"color":32,"id":68,"name":69,"slug":69},{"color":32,"id":111,"name":112,"slug":112},"019d6bd8-ca8b-709c-b9a5-77d4910da162","ui-components",{"color":32,"id":114,"name":115,"slug":115},"019d6bd8-fba5-743f-8f9f-4e23c0b31581","tutorial",{"content":117,"createdAt":118,"id":119,"image":120,"isAffiliate":21,"isPublished":22,"publishedAt":121,"slug":122,"sourceId":7,"sourceName":8,"sourceType":10,"summary":123,"title":124,"updatedAt":125,"url":126,"urlHash":127,"tags":128},"When building Vue applications, performance usually feels great by default - Vue’s reactivity system is incredibly efficient. But as applications grow larger, you may eventually run into situations where: components re-render too often large lists become expensive UI updates feel sluggish unnecessary computations happen repeatedly This is where memoization becomes useful. And in Vue, one of the easiest ways to optimize rendering is with v-memo. In this article, we’ll explore: What memoization is What problem it solves How v-memo works in Vue Real-world examples Best practices and common mistakes Let’s dive in. 🤔 What Is Memoization? Memoization is an optimization technique where results are cached and reused instead of recalculating them again. Instead of: recomputing re-rendering recalculating You simply use the cached version. 🟢 What Problem Does Memoization Solve? In reactive applications, updates can trigger many re-renders even when most data has not changed for example: Parent component updates Entire list re-renders Hundreds of child components update unnecessarily This can hurt performance, responsiveness, and even battery usage on mobile devices. Without memoization every update causes new rendering work - even for unchanged content. With memoization Vue can skip rendering when dependencies stay the same which reduces DOM operations, Virtual DOM diffing, and in general component work. 🟢 What Is v-memo in Vue? v-memo is a Vue directive that memoizes part of a template. Basic example: <div v-memo=\"[value]\"> {{ expensiveContent }} <\u002Fdiv> Vue will only re-render this block when value changes. Otherwise Vue reuses the previous rendered result. Let’s imagine a large user list. Without v-memo <script setup lang=\"ts\"> const users = ref([ { id: 1, name: 'John' }, { id: 2, name: 'Alice' } ]) const counter = ref(0) <\u002Fscript> <template> <button @click=\"counter++\"> {{ counter }} <\u002Fbutton> <div v-for=\"user in users\" :key=\"user.id\" > {{ user.name }} <\u002Fdiv> <\u002Ftemplate> Every counter update re-renders the whole list even though users never changed. With v-memo we can: <script setup lang=\"ts\"> const users = ref([ { id: 1, name: 'John' }, { id: 2, name: 'Alice' } ]) const counter = ref(0) <\u002Fscript> <template> <button @click=\"counter++\"> {{ counter }} <\u002Fbutton> <div v-for=\"user in users\" :key=\"user.id\" v-memo=\"[user.id]\" > {{ user.name }} <\u002Fdiv> <\u002Ftemplate> And now counter updates still happen but unchanged list items are skipped. This becomes extremely valuable for large lists, dashboards, or tables. 🟢 When NOT to Use It v-memo is not needed everywhere as Vue is already highly optimized. Avoid using it for tiny components, static content, or premature optimization as overusing memoization can: reduce readability make debugging harder introduce stale UI bugs 🧪 Best Practices Use v-memo only for measurable bottlenecks Great for large dynamic lists Keep dependency arrays minimal Avoid premature optimization Profile performance before optimizing Combine with virtual scrolling for huge datasets Prefer stable keys and predictable state updates 📖 Learn more If you would like to learn more about Vue, Nuxt, JavaScript or other useful technologies, checkout VueSchool by clicking this link or by clicking the image below: It covers most important concepts while building modern Vue or Nuxt applications that can help you in your daily work or side projects 😉 🧪 Advance skills A certification boosts your skills, builds credibility, and opens doors to new opportunities. Whether you're advancing your career or switching paths, it's a smart step toward success. Check out Certificates.dev by clicking this link or by clicking the image below: Invest in yourself—get certified in Vue.js, JavaScript, Nuxt, Angular, React, and more! ✅ Summary Memoization is a powerful optimization technique that helps avoid unnecessary work. In this article, you learned: What memoization is What problem it solves How Vue’s v-memo works Practical examples for lists and components When to use it — and when not to Take care! And happy coding as always 🖥️","2026-05-18T12:00:05.150Z","019e3af5-2608-71df-9da8-92a67430a7ef","https:\u002F\u002Fmedia2.dev.to\u002Fdynamic\u002Fimage\u002Fwidth=1200,height=627,fit=cover,gravity=auto,format=auto\u002Fhttps%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F7b8usfxc7u7injpn8yor.png","2026-05-18T09:21:34.000Z","avoid-unnecessary-re-renders-in-vue-with-v-memo","This article discusses the use of the `v-memo` directive in Vue to optimize rendering by memoizing parts of a template, which helps avoid unnecessary re-renders, especially in large applications. It explains the concept of memoization, its benefits, and provides examples and best practices for effective use in Vue components.","Avoid Unnecessary Re-renders in Vue with `v-memo`","2026-06-10T14:35:13.762Z","https:\u002F\u002Fdev.to\u002Fjacobandrewsky\u002Favoid-unnecessary-re-renders-in-vue-with-v-memo-49bo","15f62df5f7c0b28470c39c37cedc4db4537ead55e3c1365af313657060bac4f8",[129,130,131,134,135],{"color":32,"id":33,"name":34,"slug":34},{"color":32,"id":62,"name":63,"slug":63},{"color":32,"id":132,"name":133,"slug":133},"019e3af5-4a29-759a-81b0-b6d502b2449e","v-memo",{"color":32,"id":65,"name":66,"slug":66},{"color":32,"id":114,"name":115,"slug":115},{"content":137,"createdAt":138,"id":139,"image":140,"isAffiliate":21,"isPublished":22,"publishedAt":141,"slug":142,"sourceId":7,"sourceName":8,"sourceType":10,"summary":143,"title":144,"updatedAt":145,"url":146,"urlHash":147,"tags":148},"When developers think about performance optimization, they usually focus on things like: lazy loading caching image optimization bundle size And while those things absolutely matter there’s another area that heavily impacts user experience -> Loading states and layout stability. A badly implemented loading experience can make an app feel slow, jumpy, or frustrating to use. This is strongly connected to an important Core Web Vital metric Cumulative Layout Shift (CLS). In this article, we’ll explore: What CLS is Why loaders are critical for perceived performance How poor loading states hurt UX Practical examples in Vue Best practices for stable layouts Let’s dive in. 🤔 What Is Cumulative Layout Shift (CLS)? CLS measures how much elements unexpectedly move during page loading. Example of bad CLS: Text suddenly jumps down Buttons move while you try to click Images appear late and push content around We’ve all experienced websites like this: 👉 You try to click something… and suddenly the layout shifts. Extremely annoying. Why does this happen? Usually because: content loads asynchronously elements have no reserved space loaders are missing images don’t define dimensions components suddenly appear Why does CLS matter? Because it affects user experience, accessibility, or mobile usability (and obviously Google Core Web Vitals). Even if your app is technically fast poor layout stability can make it feel slow. 👉 Users care more about perceived performance than actual milliseconds. A good loader communicates progress, prevents layout jumping, and makes apps feel responsive A bad or missing loader creates uncertainty. Users start thinking: “Did the app freeze?” “Is something broken?” “Why is everything moving?” 🟢 Implementing proper loaders in Vue Let's take a look at the following example: <script setup lang=\"ts\"> const users = ref([]) const loading = ref(true) onMounted(async () => { users.value = await fetchUsers() loading.value = false }) <\u002Fscript> <template> <div v-if=\"loading\" class=\"skeleton-list\"> <div v-for=\"n in 5\" :key=\"n\" class=\"skeleton-card\" \u002F> <\u002Fdiv> <UserCard v-else v-for=\"user in users\" :key=\"user.id\" :user=\"user\" \u002F> <\u002Ftemplate> <style scoped> .skeleton-card { height: 120px; border-radius: 12px; margin-bottom: 16px; } <\u002Fstyle> We fetch users, but when the fetch is in progress we display the same hard coded number of loaders\u002Fskeletons. When the users are loaded there is no layout shift as it occupies the same space improving perceived performance and User Experience. If we don't know how many results there will be, we have to assume some number but it is still better than not having skeletons at all :) Many apps still use simple spinners or text\u002Ficon loaders like: <div>Loading...<\u002Fdiv> But modern UX usually prefers Skeleton loaders because they mimic final layout, reduce layout shift, and improve perceived speed. 🧪 Best Practices Prefer skeleton loaders over tiny spinners Reserve space before content loads Keep loading and final layouts similar Always define image dimensions Avoid injecting large content suddenly Test CLS using Lighthouse or Core Web Vitals tools Think about perceived performance — not just raw speed 📖 Learn more If you would like to learn more about Vue, Nuxt, JavaScript or other useful technologies, checkout VueSchool by clicking this link or by clicking the image below: It covers most important concepts while building modern Vue or Nuxt applications that can help you in your daily work or side projects 😉 🧪 Advance skills A certification boosts your skills, builds credibility, and opens doors to new opportunities. Whether you're advancing your career or switching paths, it's a smart step toward success. Check out Certificates.dev by clicking this link or by clicking the image below: Invest in yourself—get certified in Vue.js, JavaScript, Nuxt, Angular, React, and more! ✅ Summary Loaders are much more important than most developers realize. In this article, you learned: What Cumulative Layout Shift (CLS) is Why poor loading states hurt UX How skeleton loaders improve perceived performance How to avoid layout jumping in Vue and other frameworks Best practices for stable, responsive interfaces Fast apps are great. But apps that feel smooth and stable are what users truly remember. Take care! And happy coding as always 🖥️","2026-05-11T12:00:12.770Z","019e16e8-bfd2-7191-94bc-00d70b24a540","https:\u002F\u002Fmedia2.dev.to\u002Fdynamic\u002Fimage\u002Fwidth=1200,height=627,fit=cover,gravity=auto,format=auto\u002Fhttps%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fbym0bvla6v4jibn66jc3.png","2026-05-11T09:29:43.000Z","why-loaders-matter-for-performance","This article discusses the importance of loaders in enhancing perceived performance and user experience in web applications, particularly focusing on the concept of Cumulative Layout Shift (CLS). It highlights how proper implementation of loaders in Vue can prevent layout shifts and improve user engagement by providing a stable loading experience. The article also offers practical examples and best practices for implementing effective loaders.","Why Loaders Matter for Performance","2026-06-10T14:35:13.764Z","https:\u002F\u002Fdev.to\u002Fjacobandrewsky\u002Fwhy-loaders-matter-for-performance-4b8a","d90fb6c45448cd6496f59658878a5381e26f71ac1b914ec7c7c4c29bf64f2c6e",[149,150,151,154,157],{"color":32,"id":33,"name":34,"slug":34},{"color":32,"id":62,"name":63,"slug":63},{"color":32,"id":152,"name":153,"slug":153},"019e16e8-dbfa-76d6-bb2d-793aee049186","loading",{"color":32,"id":155,"name":156,"slug":156},"019e16e8-dc00-714d-911a-a5bf39238587","user-experience",{"color":32,"id":45,"name":46,"slug":46},{"content":159,"createdAt":160,"id":161,"image":162,"isAffiliate":21,"isPublished":22,"publishedAt":163,"slug":164,"sourceId":7,"sourceName":8,"sourceType":10,"summary":165,"title":166,"updatedAt":167,"url":168,"urlHash":169,"tags":170},"When building modern web applications, security is not optional. One of the most important protections you can add is a Content Security Policy (CSP). But here’s the catch: 👉 CSP often blocks inline scripts and styles — which can break your app. So how do you keep your app secure without disabling useful features? That’s where CSP nonce comes in - it allows you to safely execute inline code without opening security holes. In this article, we’ll explore: What CSP nonce is What problem it solves How to implement it How it works automatically in Nuxt with nuxt-security Best practices and common pitfalls Let’s dive in. 🤔 What Is CSP Nonce? A nonce (short for number used once) is a unique, random value generated for each request. It is used in CSP to explicitly allow trusted inline scripts or styles. Example: <script nonce=\"abc123\"> console.log('Secure inline script') <\u002Fscript> And in your HTTP headers: Content-Security-Policy: script-src 'nonce-abc123' The browser will only execute scripts that have a matching nonce. CSP nonce is a whitelist mechanism: Only scripts with the correct nonce are allowed Everything else is blocked The nonce changes on every request This makes it extremely effective against XSS (Cross-Site Scripting) attacks. CSP nonce is commonly used for: SSR frameworks - Injecting initial state, Hydration scripts Analytics \u002F tracking snippets - Inline scripts required by providers Critical inline scripts - Small scripts needed before app bootstraps 🟢 What Problem Does CSP Nonce Solve? Without nonce, you usually face a trade-off: ❌ Allow inline scripts (unsafe) Content-Security-Policy: script-src 'unsafe-inline' Problem: Opens the door to XSS attacks Any injected script can run ❌ Block inline scripts completely Content-Security-Policy: script-src 'self' Problem: breaks inline event handlers breaks injected scripts (SSR hydration, state) breaks some frameworks 🟢 How to Implement CSP Nonce The process is relatively simple but let's break it down and explain each step individually. Step 1: Generate a nonce per request Example (Node.js): import crypto from 'crypto' function generateNonce() { return crypto.randomBytes(16).toString('base64') } Step 2: Add it to response headers const nonce = generateNonce() res.setHeader( 'Content-Security-Policy', `script-src 'nonce-${nonce}'` ) Step 3: Inject it into your HTML <script nonce=\"{{nonce}}\"> window.__INITIAL_STATE__ = {} <\u002Fscript> ⚠️ Critical rule The nonce in the header and HTML must match exactly. Otherwise, script will be blocked and app may break silently. 🟢 CSP Nonce in Nuxt (with nuxt-security) If you’re using Nuxt, things get much easier thanks to nuxt-security module that can: Automatically generate nonce per request Inject it into CSP headers Attach it to scripts\u002Fstyles It makes it much easier to work with CSP nonces in Nuxt. Let's take a look at the following configuration: export default defineNuxtConfig({ modules: ['nuxt-security'], security: { headers: { contentSecurityPolicy: { 'script-src': [ \"'self'\", \"'nonce-{{nonce}}'\" ] } } } }) What happens automatically: Nuxt generates a nonce per request Replaces {{nonce}} in headers Applies nonce to inline scripts You don’t need to manually wire everything You can read more here: https:\u002F\u002Fnuxt-security.vercel.app\u002F 🟢 Common Mistakes Let's take a look at the list of common mistakes to understand what to look for: ❌ Reusing the same nonce - Nonce must be unique per request and cryptographically random ❌ Forgetting to apply nonce in HTML - if you only set CSP header the scripts will still be blocked ❌ Mixing nonce with unsafe-inline - script-src 'unsafe-inline' 'nonce-abc' ❌ Caching issues - if HTML is cached nonce may not match header 🧪 Best Practices Generate nonce per request Use secure randomness (crypto) Never reuse nonce Avoid unsafe-inline Use frameworks\u002Ftools (like nuxt-security) Test CSP in report-only mode first Monitor browser console for CSP violations 📖 Learn more If you would like to learn more about Vue, Nuxt, JavaScript or other useful technologies, checkout VueSchool by clicking this link or by clicking the image below: It covers most important concepts while building modern Vue or Nuxt applications that can help you in your daily work or side projects 😉 🧪 Advance skills A certification boosts your skills, builds credibility, and opens doors to new opportunities. Whether you're advancing your career or switching paths, it's a smart step toward success. Check out Certificates.dev by clicking this link or by clicking the image below: Invest in yourself—get certified in Vue.js, JavaScript, Nuxt, Angular, React, and more! ✅ Summary CSP nonce is a powerful mechanism that allows you to safely use inline scripts while maintaining strong security. In this article, you learned: What CSP nonce is and how it works What problem it solves (security vs flexibility) How to implement it step by step How Nuxt + nuxt-security handle it automatically Common mistakes and best practices Take care! And happy coding as always 🖥️","2026-04-27T08:00:05.007Z","019dcdf3-df7e-70dd-ba04-801be7e72c7d","https:\u002F\u002Fmedia2.dev.to\u002Fdynamic\u002Fimage\u002Fwidth=1200,height=627,fit=cover,gravity=auto,format=auto\u002Fhttps%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fp5bl1ap8ran4lh39r6v8.png","2026-04-27T06:46:57.000Z","how-to-safely-allow-inline-scripts-without-breaking-security-with-csp-nonce","This article discusses how to implement Content Security Policy (CSP) nonce to safely allow inline scripts in web applications without compromising security. 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