Tutorial: Learning by Snippets25

Introduction

is a popular JavaScript framework for building user interfaces. It's known for its simplicity, flexibility, and powerful features. In this tutorial, we'll learn the basics of by going through a series of code snippets.

Creating a Vue Instance

To create a Vue instance, we use the `new Vue()` constructor:```javascript
const app = new Vue({
// Options...
});
```

Data Binding

uses a reactive data binding system. When a data property changes, automatically updates the UI. To bind data to an HTML element, use the `v-model` directive:```html

```

Event Handling

To handle events in , we use the `@` symbol followed by the event name. For example:```html
Click Me
```

Conditional Rendering

provides conditional rendering directives, such as `v-if` and `v-else`. These directives allow us to show or hide elements based on certain conditions:```html

Hello

Goodbye```

Iteration

To iterate over an array or object, we use the `v-for` directive. For example:```html

{{ item }}

```

Components

Components are reusable Vue instances. They can be defined and used throughout your application. To define a component, use the `()` method:```javascript
('my-component', {
// Component definition...
});
```

Computed Properties

Computed properties are functions that return dynamic values based on the state of the Vue instance. They are cached until their dependencies change:```javascript
computed: {
fullName() {
return + ' ' + ;
}
}
```

Methods

Methods are functions that can be called from the Vue instance. They can perform actions or manipulate data:```javascript
methods: {
handleClick() {
alert('Hello world!');
}
}
```

Watchers

Watchers monitor specific properties or expressions for changes. When a change occurs, the watcher function is called:```javascript
watch: {
message: {
handler(newValue, oldValue) {
// Do something...
}
}
}
```

Lifecycle Hooks

Lifecycle hooks are methods that are called during different stages of a Vue instance's lifecycle. They allow us to perform specific actions at certain points in time:```javascript
created() {
// Initialize component
},
mounted() {
// DOM is mounted
},
destroyed() {
// Component is destroyed
}
```

Router

The Vue Router is an official library for managing client-side routing in applications. It allows us to define routes and navigate between them:```javascript
import VueRouter from 'vue-router';
const router = new VueRouter({
routes: [{
path: '/home',
component: Home
}]
});
```

Redux

Redux is a popular state management library that can be used with . It helps us centralize and manage the state of our application:```javascript
import Vuex from 'vuex';
const store = new ({
state: {
count: 0
},
mutations: {
increment(state) {
++;
}
},
actions: {
incrementAsync({ commit }) {
setTimeout(() => {
commit('increment');
}, 1000);
}
}
});
```

Conclusion

In this tutorial, we explored the basics of through a series of code snippets. We covered data binding, event handling, conditional rendering, iteration, components, computed properties, methods, watchers, lifecycle hooks, router, and Redux. This foundation will help you build powerful and interactive applications.

2025-02-08

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