Vue.js Key Concepts

• The following are key concepts in Vue.js: Components, Routes, Vue Lifecycle, State Management, API Endpoint, and .env File.

Components

• Components are reusable, self-contained pieces of UI.
• Components facilitate code reuse, better organization, and easier maintenance.
• A template is defined to contain HTML code:

<template>
  <div><h1>Hello, World!</h1></div>
</template>

Routes

• Routes define paths (URLs) and map them to specific components or views.
• They enable navigation without page reloads.
• Here is an example:

const routes = [
  { path: '/', component: Home },
  { path: '/about', component: About }
];

Vue Lifecycle

• The Vue Lifecycle is the sequence of events that a Vue component goes through from creation to destruction.
• Common lifecycle hooks include: beforeCreate(), created(), mounted(), updated(), and unmounted().

State Management

• State management constitutes the centralized management of application data across components.
• State management ensures a consistent and predictable state.
• Here is an example of how to manage state in Vue:

state: { count: 0 }
mutations: { increment(state) { state.count++; } }

API Endpoint

• An API endpoint is a URL specifying where to access a resource on a web server.
• API endpoints enable communication between frontend and backend.
• Here is an example of how to call an API endpoint:

const response = await
fetch('https://api.example.com/users');

.env File

• A .env file is a configuration file for storing environment-specific variables (e.g., API keys).
• The purpose of the .env file is to keep sensitive data out of the source code.
• Here is an example:

.env:
VUE_APP_API_URL=https://api.example.com