Vue 3 Composition Api Cheat Sheet

The Vue 3 Composition API Cheat Sheet is a reference guide that provides a summary of the key features and syntax of the Composition API in Vue 3. It is designed to help developers quickly grasp and utilize the Composition API in their Vue.js projects.

FAQ

Q: What is Vue 3 Composition API?
A: Vue 3 Composition API is a new way of organizing and reusing logic in Vue.js applications.

Q: What are the benefits of using Composition API?
A: Composition API allows for better code organization, reusability of logic, and improved performance in Vue 3 applications.

Q: How is Composition API different from Options API?
A: Composition API is a function-based API, while Options API is an object-based API. Composition API provides more flexibility and easier code reuse compared to Options API.

Q: How do you define a component using Composition API?
A: Components using Composition API are defined using the 'defineComponent' function instead of the 'Vue.component' method.

Q: What is 'reactive' in Composition API?
A: 'Reactive' is a function in Composition API used to make a data property of a component reactive, so that it automatically updates when the property changes.

Q: What is 'ref' in Composition API?
A: 'Ref' is a helper function in Composition API used to create a reactive reference to a value. It is commonly used for primitive values like numbers and strings.

Q: What is 'computed' in Composition API?
A: 'Computed' is a function in Composition API used to define a computed property for a component. Computed properties are derived from other reactive properties and are automatically updated when the dependencies change.

Q: What is 'watch' in Composition API?
A: 'Watch' is a function in Composition API used to watch for changes in a reactive property. It allows you to perform certain actions or side effects when the property changes.

Q: What is 'onMounted' in Composition API?
A: 'onMounted' is a lifecycle hook in Composition API used to run a function when a component is mounted, similar to the 'mounted' lifecycle hook in Options API.

Q: Can you use Composition API with Vue 2?
A: No, Composition API is only available in Vue 3 and newer versions.