Monitoring and Maintenance
Monitor production apps and keep them healthy.
Monitoring and Maintenance is a free Vue Academy lesson on CoddyKit — lesson 3 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Vue Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Life After Launch
Shipping is the start, not the end. A healthy app needs ongoing monitoring to catch errors, analytics to understand usage, and regular maintenance to stay secure and up to date.
Why Track Errors?
Errors that happen on users devices are invisible to you unless you collect them. Error tracking captures crashes in production so you can fix problems users hit, often before they report them.
Sentry for Error Tracking
Sentry is a widely used error-tracking service. Install its SDK and initialize it when your app starts to automatically capture unhandled errors.
npm install @sentry/vueInitializing Sentry
Initialize Sentry with your project DSN and the Vue app instance so it can hook into Vue error handling.
import * as Sentry from "@sentry/vue"
import { createApp } from "vue"
import App from "./App.vue"
const app = createApp(App)
Sentry.init({
app,
dsn: "https://example@sentry.io/123"
})
app.mount("#app")Capturing Custom Errors
Beyond automatic capture, you can report handled errors manually to get context on issues your code already catches.
try {
riskyOperation()
} catch (err) {
Sentry.captureException(err)
}Adding Analytics
Analytics tell you how users actually use your app: which pages they visit, what they click, where they drop off. This data guides product decisions.
Tracking Page Views
With Vue Router you can send a page-view event on each navigation using a router hook.
router.afterEach((to) => {
trackPageView(to.fullPath)
})Keeping Dependencies Updated
Outdated packages accumulate bugs and security holes. Periodically check for updates and apply them, testing as you go.
npm outdated
npm updateAuditing for Vulnerabilities
Run a security audit to find known vulnerabilities in your dependency tree and apply available fixes.
npm audit
npm audit fixMonitoring Production Performance
Real users have varied devices and networks. Use real-user monitoring (often built into error tools) and metrics like load time to ensure performance stays good after launch.
Handling Breaking Changes
Major version updates can introduce breaking changes. Read the changelog and migration guide, update in a branch, run your test suite, and fix issues before merging. Tests make this safe.
Quick Check
Test your knowledge of monitoring and maintenance.
Recap
After launch, monitor with error tracking (Sentry), understand usage with analytics, keep packages current with npm outdated and npm audit, and watch production performance. Handle breaking changes carefully using your test suite. Next you will explore advanced patterns and best practices.
Frequently asked questions
Is the “Monitoring and Maintenance” lesson free?
Yes — the full text of “Monitoring and Maintenance” is free to read here on the web, and the Vue Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Vue Academy course, upgrade to CoddyKit PRO.
What will I learn in “Monitoring and Maintenance”?
Monitor production apps and keep them healthy. You practise Vue Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Vue Academy?
No prior experience is required. Vue Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 3, so you can start here or from the beginning and move at your own pace.
How long does the “Monitoring and Maintenance” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Vue Academy lesson?
Yes. Every Vue Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Optimizing the Build Process
- Deploying to Hosting Platforms
- Monitoring and Maintenance