What is the recommended API for building components in modern Vue 3?

The Composition API is recommended for modern Vue 3 components because it groups related logic together and improves reuse.

How do you create a reactive counter from a single number in Vue 3?

Use ref(), for example: const count = ref(0). Access or update the value in JavaScript with count.value.

What is the difference between v-if and v-show in Vue?

v-if adds or removes elements from the DOM, while v-show keeps them in the DOM and only toggles their CSS display.

Free online course Master Vue JS API

Duration of the online course: 6 hours and 14 minutes

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Build modern Vue 3 apps faster with the Composition API. Take this free online course to create reactive UIs, cleaner components, and job-ready projects.

In this free course, learn about

Vue 3 Composition API and Real-World Projects

About the free online course

Upgrade your Vue 3 skills by learning how to build cleaner, more scalable components with the Composition API. This free online course focuses on the patterns and mental models that help you move from copying snippets to confidently structuring real applications. If you want to ship features faster, reduce tangled component logic, and make your code easier to test and maintain, the Composition API is one of the most valuable tools in the modern Vue ecosystem.

You will practice creating reactive state the right way, including handling simple values like counters and understanding what Vue tracks under the hood. Along the way, you will get comfortable with the template features developers use every day, such as binding dynamic attributes, controlling what renders on the page, and connecting form elements to state without writing repetitive boilerplate. Instead of memorizing rules, you will learn when to reach for each approach and why it matters in real projects.

The course also clarifies important distinctions that often confuse beginners and slow down experienced developers, such as how conditional rendering choices impact performance and behavior, and why providing stable identifiers is critical when rendering lists. These details are the difference between an app that looks correct in simple demos and an interface that remains reliable when data changes, components re-order, or users interact rapidly.

By the end, you will feel comfortable choosing the recommended API for building components in Vue 3, organizing logic in a way that scales, and implementing the reactive UI patterns that front-end and full-stack roles expect. Whether you are strengthening your foundations or refreshing your Vue knowledge for modern best practices, this course gives you practical confidence you can apply immediately.

Course content

Video class: Master Vue.js Composition API: Build 10 Stunning Projects for Real-world Expertise! 6h14m
Exercise: Which API is recommended for building components in modern Vue 3?
Exercise: How should you create a reactive counter based on a single number?
Exercise: Which syntax is the shorthand for binding the img src attribute?
Exercise: What is the key difference between v-if and v-show?
Exercise: Why should you provide a unique key for elements rendered with v-for?
Exercise: What does v-model provide when used on inputs, selects, or textareas?

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Learn aboutVueJS

Explore the best free online VueJS courses and learn to build fast, interactive web applications with this popular JavaScript framework. Study Vue fundamentals, components, routing, state management, and real-world app development at your own pace. Enroll for free, improve your front-end skills, and earn a certificate upon completion.