面试题与答案

Vue components are reusable and self-contained units that encapsulate a specific piece of functionality. They promote code reusability, maintainability, and separation of concerns in a Vue application.

Vuex is the state management library for Vue.js applications. It helps manage the state of the application in a centralized store, making it easy to maintain and share state across components.

Two-way data binding in Vue.js allows automatic synchronization of data between the model and the view. It is achieved using the v-model directive, which binds an input element to a variable and updates both the input value and the variable when either changes.

A computed property in Vue.js is a property whose value is derived from other reactive data. It is recalculated only when its dependencies change, providing a way to perform calculations on the fly without re-rendering unnecessarily.

Mixins in Vue.js are a way to reuse and share logic across multiple components. They allow you to encapsulate and distribute reusable functionality by merging the properties and methods of a mixin into a component.

Scoped slots in Vue.js allow a child component to communicate data to a parent component. It provides more flexibility in passing data from child to parent.

Mixins allow you to reuse and share logic across multiple components, while extends in Vue.js create an extended constructor for a component, inheriting options from another component.

The key attribute in Vue.js is used to give each rendered element a unique identifier, helping Vue efficiently update the DOM by reusing existing elements instead of re-rendering.

The v-model directive in Vue.js is used for two-way data binding on form input elements. It automatically syncs the input value with a variable in the data.

Provide/inject in Vue.js allows a component to provide data that can be injected into its descendants. It helps in prop drilling by providing a clean way to share state without using props.