Unlocking Vue.js: Your Guide from Installation to Advanced State Management

Vue is an incredible JavaScript framework that takes your user interface development to the next level. It goes beyond just HTML, CSS, and JavaScript by offering a declarative and component-based programming model. This means that you can efficiently create user interfaces, whether they are simple or complex. Vue makes the process smoother and more streamlined, allowing you to focus on creating amazing experiences for your users while saving time and effort along the way.

Advantages of Using Vue.js

  1. One of the major advantages of Vue.js is its compact size. This means you can quickly download and integrate it into your project with ease, allowing for a seamless development experience.
  2. The main reason for the popularity of the Vue.js framework is its simple and intuitive structure.
  3. Vue.js offers a wide range of components that cater to various needs, making it highly versatile and compatible with existing applications.
  4. Vue.js’s flexible nature appeals to developers familiar with React.js, Angular.js, and other new JavaScript frameworks and makes it easy for them to understand.

Difference Between Vue, Angular, and React

difference-between-vue-angular-react
Fig. Difference Between Vue, Angular, and React

How to Install Vue CLI?

Installation Command

To use Vue CLI 4.x, it is necessary to have Node.js version 8.9 or above (v10+ is recommended). Fortunately, there are several tools available that allow us to manage multiple versions of Node on the same machine. Some popular options include “n”, “nvm”, or “nvm windows”. These tools provide the flexibility to easily switch between different versions of Node based on our project requirements.

npm install -g @vue/cli
# OR
yarn global add @vue/cli

We can check you have the right version with this command:

vue --version

Creating an Application

Run the following command in the terminal in order to create a Vue application:

vue create first-vue-app
vue CLI v5.8.8
: Please pick a preset: (Use arrow keys)
> Default {[Vue 3] babel, eslint)
   Default {[Vue 2] babel, eslint)
   Manually select features

Wait for the projects to be generated, and cd first-app.

Run

npm run serve

Options API vs. Composition API

option-api-vs-composition-api
Fig. Options API vs. Composition API

code-snippet

How Vue.js Application Renders?

Vue.js utilizes virtual DOM, which is a memory-based replica of the actual DOM. This virtual representation stays synchronized with the real DOM, ensuring efficient and optimized rendering of the user interface.

Related read: React Virtual Dom vs. Real Dom

Here is the rendering pipeline:

1. Compile: Vue.js components are compiled into a render function, which then generates virtual DOM trees.

2. Mount: The runtime render function is responsible for executing the rendering process. It operates by traversing the virtual DOM and creating corresponding nodes in the actual DOM based on its structure and properties.

3. Patch: The runtime render function is responsible for walking through the new DOM tree and comparing it to the old one. It identifies any updates or new nodes in the DOM and applies them accordingly.

rendering-pipeline
Fig. Rendering Pipeline

Template Syntax in Vue.js

Vue.js utilizes a template syntax based on HTML, which provides a seamless integration between HTML and JavaScript. The templates are diligently compiled by Vue, resulting in the generation of remarkably optimized JavaScript code. This proficiently enhances the performance of the application. Below are various approaches available for the template syntax;

Text Interpolation

Text interpolation in Vue.js is achieved by using double curly braces “{{ }}”. You can place variables or data inside these braces to dynamically display their values in the HTML template. For example, if you have a variable ‘message’ in your Vue component, you can display it in the template as ‘{{ message }}’, and Vue will automatically update the content whenever the ‘message’ changes.

Raw HTML

Vue.js allows you to render raw HTML content using the ‘v-html’ directive. This is useful when you want to inject HTML from a data property or computed property into your template. Be careful when using ‘v-html’ as it can pose security issues if the content comes from untrusted sources.

Attribute Bindings

Vue enables you to bind HTML attributes to data properties or expressions using directives like ‘v-bind’ or simply ‘:’ followed by the attribute name. This is handy for dynamically setting attributes like ‘src’, ‘href’, ‘class’, and more. For instance, to bind the ‘href’ attribute of a link to a variable ‘linkUrl’, you would use ‘v-bind:hrf= “linkUrl” or the shorthand ‘:href: “linkUrl”’.

Using JavaScript Expression

Vue.js templates allow you to use JavaScript expressions within double curly braces ‘{{ }}’. These expressions can include simple operations, calculations, and function calls. For example, you can do something like ‘{{ count * 2}}’ to display the result of ‘count’ multiplied by 2 in your template.

Directives

Vue.js provides a set of custom directives prefixed with ‘v-’ that you can use to add special behavior to your HTML elements. For example, ‘v-for’ is used for rendering lists, ‘v-if’ for conditional rendering, ‘v-on’ or ‘@’ for event handling, and ‘v-model’ for two-way data binding to form elements. Directives improve the abilities of your templates and allow you to create dynamic and interactive web applications.

Reactivity Fundamentals

Options API 

Composition API 

Declare reactive state using data option To declare a reactive state using the ref() function 
Functions can be defined in the methods option Functions can be defined using the function keyword 
Functions can be called in lifecycle hooks, mounted is one of the hooksFunctions called in onMounted() listener

ref() Example

import { ref } from 'vue'
const count = ref(0)

console.log(count) // {value : 0}
console.log(count.value) // 0

console.value++
console.log(count.value) // 1

setup() Example

<script>
import { ref } from 'vue'

export default {
setup() {
const count = ref(0)

// expose to template and other options API hooks
return {
count
}
},

mounted() {
console.log(this.count) // 0
}
}
</script>

<template>
<button @click="count++">{{ count }}</button>
</template>

What is State Management?

state-management
Fig. State Management

State management is an imperative aspect of software development, encompassing the meticulous handling of data that accurately represents the state of a software application at any given instance. This concept holds the utmost significance, particularly in the realm of intricate applications such as web applications, mobile apps, and desktop software. The effectiveness of state management directly contributes to the creation of robust, easily maintainable, and highly scalable applications.

example-state-management

Simple State Management with Reactivity API

The most effective approach for sharing the state is to generate a reactive object by utilizing the reactive () method. Subsequently, proceed to import the aforementioned object into numerous components.

Simple-State-Management-with-Reactivity-API.

component-management-with-Reactivity-API

DEMO

Watch our enlightening Vue.js video to level up your knowledge ⬇️

coma

Conclusion

In the ever-evolving world of web development, staying ahead of the curve is essential. Vue.js, with its simplicity, flexibility, and progressive nature, is a standout choice for developers looking to build modern, responsive, and interactive web applications.

In this journey to get started with Vue.js, we have explored the core concepts that make this framework a valuable addition to your toolkit. From its HTML-based template syntax to its component-based architecture, Vue.js empowers developers to create dynamic and efficient user interfaces.

Vue.js is the ideal framework for both experienced developers seeking a more streamlined approach to web interface creation and beginners excited to embark on their web development journey. By embracing Vue.js, you gain access to the ability to craft extraordinary user experiences. Begin your Vue.js adventure today and unveil a universe of endless possibilities in the realm of web development.

Content Team

This blog is from Mindbowser‘s content team – a group of individuals coming together to create pieces that you may like. If you have feedback, please drop us a message on contact@mindbowser.com

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