Vue Js 3 Tutorial

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In this tutorial we learn how to use the popular Axios API for HTTP requests in Vue.

We cover some of its benefits, error handling and the convenience methods that allow us to easily get, post, update and delete data.

If you want to follow along with the examples in this lesson, you will need an app generated by the Vue CLI. If you already have one from a previous lesson, you can use it instead. Axios is a simpler alternative to the native Javascript Fetch API.

It has some additional benefits lilke automatic JSON data transformation.

  1. Like the Fetch API, it’s a promise-based HTTP client and works in the browser.
  2. It also works isomorphically on Node.js, which means it can share a codebase in both the browser and Node.js.
  3. Axios was inspired by theHTTP service in Angularand is built with the following features.
  4. MakesXMLHttpRequestsfrom the browser. Makeshttprequests from Node.js. Supports thePromise API.
  5. Intercepts requests and responses. Transform request and response data. Ability to cancel requests. Automatic transformation of JSON data.
  6. Client side support for protecting againstCross Site Request Forgery (XSRF).
  7. In this lesson we will show examples of how to use Axios with theJSONPlaceholderservice.

It’s a free online REST API with fake data that makes it easy for us to focus on learning Axios with Vue, instead of worrying about setting up a database.

Everything we learn here will be applicable to whatever API you’re using, like Firebase. You can install Axios with npm by executing the following command in your project folder. tipIf you’re working in VSCode, you can go toTerminal>New Terminalto open a terminal or command prompt with the project folder already selected. Alternatively, you can useyarnorbower. Once the installation is complete, you should see Axios in the list of dependencies in yourpackage.jsonfile.

When we want to use it in a component in Vue, we have to import the axios package above the config object in the component’s script block. If you want to load Axios through a CDN, you can use JsDeliver or unpkg. Axios allows us to send HTTP requests in one of two ways. We can pass a configuration object to its constructor that consists of at least the request method (get, post etc.) and the url we want to send the request to.

If we’re creating or updating data, we also include a data object. Alternatively, we can use one of the following convenience methods. These methods take up to three arguments, with only the first parameter (the url we want to send the request to) being required.

We will use these methods in this lesson. To keep the demonstrations simple, we’ll do everything in the mounted Lifecycle hook. To receive data with Axios, we use thegetconvenience method with the URL of the API we send the request to as argument.

For our example, we want to fetch only a single blog post from JSONPlaceholder so the url ishttps://jsonplaceholder.typicode.com/posts/1.

How to install Axios

The get method will return a response object and because Axios is promise-based, we can chain athenblock to the request to handle the response.

As an example, let’s add athenblock and use it to log the data we get back to the console.

If we open the developer tools and go to the console, we will see an object in the log.

What else

If we expand this object and then itsdataproperty, we will see the post data. So if we want to access values like the post title, we have to do it throughresponse.data.

But logging the data to the console isn’t very useful, so let’s show it in the template block.

  1. The blog posts from JSONPlaceholder contain 4 properties.
  2. We’ll output everything except theuserIdin the template block.
  3. Getting multiple posts works the same, except the API path is different and we output them in the template with the v-for directive.
  4. To send data with Axios, we use the post convenience method with the URL of the API we send the request to as the first argument, and the data we want to send as the second argument.
  5. For our example, we want to create a blog post on JSONPlaceholder so the url ishttps://jsonplaceholder.typicode.com/posts.
  6. We will also log the data we just sent.
  7. If we open the developer tools and take a look in the console, we should see the object with data we just sent.
  8. In the data property we can see that our new post has been added asid:101.
  9. The data can also come from a pre-existing object like a data property that captured form input.
  10. If we run the example in the browser, we should see the same response in the browser’s console.
  11. ToPUTupdate data with Axios, we use the put convenience method with the URL of the API we send the request to as the first argument, and the data we want to update as the second argument.
  12. For our example, we want to update the post withid:1on JSONPlaceholder, so the url ishttps://jsonplaceholder.typicode.com/posts/1.

Computed Properties

We will also log the data we just updated. noteAs mentioned in the HTTP & Fetch lesson, when using PUT as the update method we have to specify all the keys even if we don’t update their values.

If open the developer tools and take a look in the console, we should see the object with data we just updated.

In the data property we can see that post 1 has been updated with the values we specified.

Ability to easily identify why component re-rendered

ToPATCHupdate data with Axios, we use the patch convenience method with the URL of the API we send the request to as the first argument, and the data we want to update as the second argument.

For our example, we want to update the post withid:1on JSONPlaceholder, so the url ishttps://jsonplaceholder.typicode.com/posts/1.

We will also log the data we just updated. If open the developer tools and take a look in the console, we should see the object with data we just updated.

In the data property we can see that post 1 has been updated with the values we specified. noteWe cover the differences between PUT & PATCHin the HTTP & Fetch lesson if you are unsure which to use to update your data. To delete data with Axios, we use thedeleteconvenience method with the URL of the resource we want to delete in the API as the argument.

For our example, we want to delete the post withid:1on JSONPlaceholder so the url ishttps://jsonplaceholder.typicode.com/posts/1.

We will also log the data we just deleted. This time when we take a look in the console, the data property will be empty.

  • Axios returns anerrorobject that we can use in a chained catch block to see what went wrong and were.
  • As an example, we’ll use the wrong url in a GET request and log the error in acatchblock.

Because the resource doesn’t exist, we see a 404 error in the console. If we want more information about the error, we can use thetoJSONJavascript method on it.

Further Reading

This time our error has a lot more information. For more information on the topics covered in this lesson, please see the relevant sections below. Want to master The Vue 3? Then here is the list consisting of The Best Vue 3 Tutorial for beginners.

Before we start the collection let’s know why VueJS getting Popular and why you need tutorials. VueJS is lightweight, easy to learn, and pleasant to write in. Besides, it is one of the powerful and flexible frontend frameworks.

It has familiar templating syntax and use of components, integrating or migrating existing projects to Vue is faster and smoother. For this reason, Vue. js is a good option for startups, as well as it is useful in large-scale applications. Furthermore, It is currently one of the most emerging front-end technologies. Unlike React.js and Angular, it supports compact file size.

In fact, Vue.js is a combination of Angular and React.js because it uses concepts such as directives and components to control and render user interfaces.

Vue.js also provides the ability to control HTML already rendered by the server, which is not the case with React.js.

The Axios API and convenience methods

Why choose Vue? Constant growth. Friendly learning curve. Ease of integration.

#3. Folder Structure

Outstanding resources. Welcoming & helpful community. Enjoyable developer experience.

Compared to Angular and React (the two most popular javascript frameworks), Vue is a lot simpler to understand for programmers and non-programmers. Also, it splits up HTML, CSS, and Javascript so you can focus on constructing each individual component exactly as you’d like.

Unique key

Vue also offers the best parts of the other front-end frameworks, plus many more features that are unique to Vue. Following are some of them:. Vue uses component-based architecture for structure and reusability.

It also keeps HTML, CSS, and JS separate in their components. Besides, it also offers a full GUI to serve, build, and create projects.

What is Axios?

Vue uses hot reloading when it’s run as an app. Hot reloading updates only what has changed on a page without a refresh. Also, VueJS has a great tooling feature that is the new Vue CLI i.e.

#7. Conditionals and Loops

x to kick start a new Project with things like Routing, Unit Testing, CSS Preprocessors, State Store, Linting, Typescript, PWA, etc.

  • Simple and easy to learn.
  • Ease in integration.
  • Highly Customizable.
  • Computed Properties.
  • Well, Angular had a complex structure and it has been hard to learn in the past.
  • Version 2 (Angular) compared to AngularJS was simplified and streamlined a lot.
  • Although, it’s still very formal, rigid, and hard to learn for some developers.

On the other hand, one of the best and yet most challenging aspects of React is JSX.

#11. Props

It condenses HTML, CSS, and JS into one language.

This makes everything simpler for developers, but harder for designers. Well, Vue solves all of the issues mentioned above.

Unlike Angular, it is easy to learn. And unlike JSX, Vue components separate HTML, CSS, and JS. It’s much easier for designers to work in a Vue component. And keeping everything clean isn’t entirely up to the developer. Vue is subjectively the easiest framework to learn and implement.

And it stays as easy as it is without sacrificing a rich and powerful feature set.

You can start your first project with Materio Free Vuetify VueJS Admin Dashboard Template. It is the latest most developer-friendly 🤘🏻 & highly customizable✨ Admin Template based on Vuetify.

provide / inject

Besides, it offers ultimate convenience and flexibility. So, you’ll be able to build whatever application you want with very little hassle. It is one of the best Vuejs examples of utilizing Vuejs in a project. Furthermore, you can use this one of the best innovative free Vuejs admin templates to create eye-catching, high-quality, and high-performing single-page applications. Besides, your apps will be completely responsive, ensuring they’ll look stunning and function flawlessly on desktops, tablets, and mobile devices.

You can also check the best laravel admin templates based on VueJS. 1 Simple Dashboard, 1 Chart Library. Single vertical menu. Simple Light/Dark theme. Basic Cards, pages, and tables. Simple From Elements⚡.

Performance optimization

Single vertical menu. Check the Figma Version:. Well, starting with anything requires guidance from an experienced person. As you are a beginner you can’t do complex things on your own. In the web development world, it is even harder to begin directly as there are lots of complex structures. Although, when it comes to Vue JS, it is comparatively easy to learn and start with.

Yet, you will need guidance here. So, to help you start with VueJS we have made a list that consists of the best Vue 3 tutorial for beginners. Advantages of Learning from Tutorials:. You can adapt the concepts easily. Can learn to develop real-world apps practically. Guidance is to the point. Before we start the collection of Vue 3 Tutorial For Beginners you can check some useful collections for beginners such as Vue JS Project Ideas For Beginners, VueJS Admin Templates Free Download, best VueJS Backend frameworks.

You can also check the bestVue editor for faster web development.

  1. Now let’s start the collection. In this Vue 3 tutorial for beginners, you’ll learn Vue.js (using version 3 – the latest major version) from the ground up & use it to make a couple of nice web projects – a reaction timer & the beginning of a small, simple blog. In this video, you’ll also get a quick intro to Vue & the new features Vue 3 has to offer.
  2. From Hello World to deploying VueJS Applications, this vue 3 tutorial for beginners is a comprehensive tutorial for beginners on Vue JS 3. In this Vue 3 tutorial for beginners, you’ll learn the fundamentals of Vue JS (v3) in this project-based crash course.

List Rendering

Vue js tutorial full course for beginners to advanced. Building 10 projects in 10 hours Using Vue 3 composition API – setup, teleport, reactivity, and ref. Besides this Vue 3 Tutorial for beginners will start from the very basics and teach you how to use TensorFlow and firebase with your vuejs in this full course of 10 hours by building 10 different apps.

A comprehensive Vue 3 Tutorial for beginners. This vue 3 tutorial for beginners deals with composition API in detail.

Conclusion

The Composition API is the biggest new feature introduced by Vue.js 3. It’s 100% optional but definitely worth a closer look as it allows you to write leaner, more elegant code – especially in bigger apps and components. This course is your first step on your path to Vue Mastery.

This Intro to Vue 3 crash course will give you a solid foundation of Vue.js skills. Throughout the tutorial, you’ll build an app to put concepts into practice.

Below you will find the starting and ending code for each lesson.

In this Vue 3 tutorial for beginners, you’ll learn how to use Vue 3 with typescript. Starting with Intro & Setup, this tutorial covers types and pros, computed values, Hylia font, and final styles. Vue Components using TypeScript. In this Vue 3 tutorial for beginners, you’ll know what front-end development means and what Vue.js is before jumping into installing the required tools and libraries and setting up our code really easily using the Vue CLI!

Attribute Binding

From the basic intro to vue 3 to use it in real-life application, this course is the ultimate source for vuejs beginners. Vueschoolis a great source of tutorials, short lessons, and courses to Learn Vue.js and modern, cutting-edge front-end technologies.

How to PATCH update data with axios.patch

It offers both free and premium courses. It is fully dedicated to Vue. The courses start from a very beginner level and bring you all the way to being a notable Vue.js developer.

Besides, the new courses are added regularly. On this learning platform, you will learn everything there is to know about Vue while building a production-ready forum application using the Vue-CLI, the managing state with Vuex, single-file components, and Vue router, building Vue plug-ins, adding third-party authentication, and a real-time database usage with Firebase.

Vuemasteryoffers a large number of courses and tutorials. They also provide useful articles and blogs on VueJS.

Besides, it is one of the most preferred Vuejs resources.

  • To be the ultimate learning resource for Vue Developers; Vuemastery does this by:.
  • Creating weekly tutorials in video and article format.
  • Co-producing the Official Vue.js News.
  • Producing exclusive content for our subscribers.
  • 25% of your monthly payment goes to the Vue Project.

Global API tree-shaking

Here you’ll get an amazing collection of articles related to VueJS. Besides, Vuedosecontains very detailed and noteworthy articles and tutorials.

Up Next

You can subscribe to receive all the articles in the mail.

This vue js tutorial will teach you how to build Vue apps through nine interactive screencasts.

Here, you’ll learn basic Vue.js concepts. Besides, this course covers the minimum JavaScript needed to get started with Vue, the basics of Vue, and two more advanced examples that build on the ideas discussed and focus on fixing some aspects of the existing codebase.

Through nine interactive screencasts, this tutorial aims to both help and inspire you.

Dynamic CSS

Alligatoris a free blogging platform with an impressive amount of posts on anything front end. Here you’ll get useful tips and comprehensive guides for Vuejs.

You will start from a Hello World to more complex concepts like lazy-loading, using third-party tools (Google Analytics, Firebase, Google Maps, Socket.io, etc.), handling online/offline, or using Apollo and GraphQL.

You’ll find many tutorials, videos, and resources that will teach you everything from the basic fundamentals of Vue to advanced Vue techniques.

In this Vue 3 tutorial, you’ll learn to build a search system that uses text input to filter articles from an array. By the end of this tutorial, you’ll have created a Vue 3 project, built two components with the Composition API.

Using what you learn in the Vue 3 Masterclass you’ll be able to develop any sort of Vue application. Your personal website, e-commerce, a SAAS for horse breeders – you name it! The Masterclass is built on practical examples, where you’ll be coming along, building together a complete forum website, and all that this entails.

Including user roles and permissions, databases, markdown, and SEO to name a few features.

Handling User Events

With help of this course, you’ll learn the basics of Vue. Also, you’ll be able to master this amazing technology from scratch.

Besides, you will learn the complete basics in this tutorial, from learning what Vue is to how to set it up and then progress onwards to actually working with its components, understanding the UI development, and even going over the entire syntax.

That is not all, you will also design an entire project using this framework to help you get a hands-on experience with Vue.

You will learn the theory as well as practical applications of this framework and how it can simplify your programming life.

In this course, we will teach you the fundamental concepts of Vue.js and create a solid foundation for your Vue journey.

The Vue.js Fundamentals course covers:. Introduction to two-way data binding. Template syntax and expressions. Vue directives, loops, and conditional rendering.

Handling user Inputs. This Vue 3 tutorial for beginners is for developers who want to move fast with Vue 3.

This book covers the traditional way of building Vue apps – the Options API – as well as the new Composition API and even see how you can mix and match them together.

There are 8 modules; 4 introduce fundamental skills (Options API; Composition API; Vuex and Vue Router).

The remaining four modules are projects, so you can see how to apply the fundamental skills in real apps. After covering Vue; you’ll get to learn Vuex, Vue’s state management solution, and Vue Router, for front-end routing.

How to send data with axios.post

The course culminates with a capstone project, using the three core Vue libraries (Vue, Vuex, Vue Router) to build an application. What you’ll learn:.

Vue JS 3 from scratch Options and Composition API. Creating reusable components. Design Patterns. Front-end Routing.

  • This is a project-based course for learning Vue.js. Throughout this vue 3 course, you’ll be able to build some small projects such as Toast notification and Carousel image slider.
  • The main project is building a real-world project called Vue Drive, a Google Drive clone with Vue js 3 composition API.
  • From basics to building a real-life vue 3 app, this Vue JS 3 course is a must to have for beginners.

What you’ll learn:. Build the real-world project with Composition API.

Learn how to use Vue js 3 for building web user interfaces. Build web applications with Vue js 3. Dive deeper into Vue js 3. You’ll learn how to build reusable components and make them flexible with props, lifecycles, and slots. Besides, you’ll use directives to build functionality with markup and learn to make your own custom directives.

And learn what’s new in Vue 3 and how to abstract functionality with the new Composition API. Here You’ll learn:.

Understand how to create interesting Vue applications. Use Vuex to manage and update data stored in the application state.

Navigate users between pages using Vue Router. Authenticate users with an advanced OAuth2 flow.

Build a beautiful drag and drop image upload. Style content intelligently using CSS Grids. Install Vue 2 through CDN, NPM, and the Vue CLI. Understand how to build a basic Vue 2 App.

Understand core fundamentals at a basic level of Vue 2. This course will provide you Understand the basics of Vue.js and the theory behind using Front-end JavaScript Frameworks.

Preparing the Application

Also, through this course, you will learn the necessary skills to develop intermediate-level Single Page Applications (SPA) by using Vue.js.

  • Besides, you will start with an introduction to Vue.js, why it is useful, and an explanation of its basic structure.
  • After that, you will cover some crucial materials around Vue.js like directives, renderers, user input handlers, and Vue components.

How to get data with axios.get

This ebook helps you get the philosophy of Vue 3 (currently 3.2.20), the new tools (like ES2015, TypeScript, Vue CLI), the essential libraries (vue-router, @vue/test-utils, Axios), and each part of the framework in a pragmatic way.

Conditional Rendering

You will be also able to kickstart your project by the end of the reading and build your amazing apps.

This vue 3 book revolves around best practices, advanced patterns, and techniques for the development of Vue applications.

Besides, it covers both Vue 2 and Vue 3 and is a one-stop resource for many crucial concepts that should help you solve and avoid many pain points when developing Vue applications.

In addition, this book covers many advanced topics, such as scalable project architecture, cutting-edge techniques for handling async operations and API states, performance optimization, state management patterns, and more.

Furthermore, each chapter in the book can be read independently, so you can immediately dive into the topic that interests you the most.

The book starts with recipes for implementing Vue.js 3’s new features in your web development projects and migrating your existing Vue.js apps to the latest version.

You will get up and running with TypeScript with Vue.js and find succinct solutions to common challenges and pitfalls faced in implementing components, derivatives, and animation, through building plugins, adding state management, routing, and developing complete single-page applications (SPAs).

Last Touches

As you advance, you’ll discover recipes to help you integrate Vue.js apps with Nuxt.js in order to add server-side rendering capabilities to your SPAs.

Besides, you’ll then learn about the Vue.js ecosystem by exploring modern frameworks such as Quasar, Nuxt.js, Vuex, and Vuetify in your web projects.

Finally, the book provides you with solutions for packaging and deploying your Vue.js apps. This book will help you understand how you can leverage Vue effectively to develop impressive apps quickly using its latest version – Vue 3.0. Besides, the book takes an example-based approach to help you get to grips with the basics of Vue 3 and create a simple application by exploring features such as components and directives.

You’ll then enhance your app-building skills by learning how to test the app with Jest and Vue Test Utils. As you advance, you’ll understand how to write non-web apps with Vue 3, create cross-platform desktop apps with the Electron plugin, and build a multi-purpose mobile app with Vue and Ionic.

Furthermore, you’ll also be able to develop web apps with Vue 3 that interact well with GraphQL APIs.

How to handle errors in Axios

Finally, you’ll build a chat app that performs real-time communication using Vue 3 and Laravel.

Other Useful Books:. So, here was the collection that consists of 10+ Vue 3 TutorialFor Beginners. Besides, this collection also consists of Vue 3 books, courses, and articles that can be helpful to you while starting with VueJS. Well, Vuejs is no doubt one of the best progressive JavaScript frameworks.

Proxy-based reactivity

Companies like Google, Apple, Behance, Trivago, Gitlab, Dribbble, BMW are using VueJS for its simplicity and ability to deliver the best results.

It is indeed the best choice to start with as it has a very supportive community. Kick start your journey as a VueJS Web Developer with help of these vue js 3 tutorials. Do share this collection with your colleagues.

Vue 3 Tutorial For Beginners

We hope you find this collection helpful. We tend to hear more and more about the upcoming 3rd major release of Vue.js. While not everything is certain yet by following discussions, we can safely assume that it’s going to be a huge improvement over the current version (that is already outstanding).

Creating the Application with Vue CLI

Vue team is doing an amazing job of improving framework APIs. Evan You described goals for Vue 3 as:. Make it smaller. Make it more maintainable. Make it easier to target native.

Make your life easier. And I am sure by looking at RFCs and talks that all of the above goals will be achieved without a problem.

In this article, I would like to guide you through some of the changes that seem most interesting to me in terms of their impact and possibilities. Before digging into certain APIs, as a performance freak I would like to talk about the performance of Vue 3.

And there is a lot to talk about! We can find significant improvements in almost every surface! Let’s start with the bundle size of Vue 3.

How to PUT update data with axios.put

Currently minified and compressed Vue runtime weights around 20kB (22.8kB for current 2.6.10 version).

  • Vue 3 bundle is estimated to weigh around half of it, so only ~10kB!
  • Above many other optimizations like better modularization Vue 3 source code will be tree-shakeable.

Handling User Input

It means that if you don’t use some of its features (like component or v-show directive) they won’t be included in your production bundle.

Currently, no matter what features we use from Vue core they are ending up in our production code because Vue instance is exported as a single object and bundlers can’t detect which properties of this object were used in the code.

Time slicing

To make global API tree-shakeable Vue team decided to import the majority of them through named exports so bundlers can detect and remove unused code:.

This is a breaking change as previously global APIs will now be available only through named exports.

This change affects:. Vue.compile (only in full builds). Vue.set (only in 2.x compatibility builds, you’ll find out soon why). Vue.delete (same as above).

It will take some time until we can fully benefit from this feature because It needs to be adopted in the ecosystem.

Vue team will release compatibility builds so we should be able to use plugins that use old APIs as well but with a cost of performance impact.

There is more than JavaScript APIs to be tree-shakeable. Under the hood Vue compiler (the tool that is transforming Vue template to render function) will detect directives used in templates and tree-shake them as well.

For example below template:. after being processed by Vue compiler will look more or less like this:.

Lesson Project

Everyone will benefit from global API tree-shaking (especially our users), but I think people that make small, lightweight websites and use just a subset of Vue functionalities for interactivity as a replacement for libraries like jQuery will value it the most.

Bundle size can significantly impact your app loading time, but after being downloaded, it also should render fast and perform smooth.

Vue core team is very aware of that, and this is why we have great improvements in runtime performance as well. Let’s start with one of the most impactful - new reactivity system based on JavaScript Proxies.

Methods

The current Vue reactivity system is based on Object.defineProperty, which has some limitations.

The most common and frustrating one is the fact that Vue is not able to track property additions/deletions of reactive objects.

We needed to use Vue.set and Vue.delete for this purposes to keep the reactivity system working as intended.

With JS Proxies we can finally get rid of this ugly workaround. The real impact of Proxies can be seen in much faster component initialization and patching.

According to tests it’s around 2x faster! The reason for this improvement is especially significant due to the fact, that with getters/setters Vue had to recursively go through all the objects and their properties and transform them.

With proxies this process is much easier. It’s important to mention that by using JS Proxies Vue 3 will drop support for Internet Explorer (not Edge) but don’t worry - there will be a compatibility build for those who want to support IE.

Update According to tweet from Evan You this feature is not gonna be included in Vue 3.

Another really exciting but rarely mentioned performance feature of Vue 3 is experimental support for Time Slicing. I will use a metaphor to explain what Time Slicing is.

I want you to imagine a line for ice creams. A very long one, because those are the best ice creams in town. After one person is served, there is another, after another, etc.

And for some reason, there is no information about the available flavors. To get this information, you need to ask the lady that sells the ice cream directly.

What’s next

With such a situation, we will probably end up with 2 lines - one for people convinced that they want to buy ice cream (waiting in patience) and one for people who wants more information about the flavors before they decide if they want ice cream or not.

How to delete data with axios.delete

The latest should get this information as soon as possible. Unfortunately, there is only one lady selling ice creams, and she will not answer any question before serving all the clients in the “main” line.

This is not the best experience for not yet convinced clients and most of them will probably find it not worth waiting.

To solve this problem, the lady could answer one question after every 2-3 served clients.

Both groups should be happy with this solution. This is exactly how CPU works with web apps.

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We have a “main” line (which is called “main thread”) that needs to fulfill all of its main tasks (scripting, rendering etc) before it can respond to user interactions.

For some pages, this can result in a very bad user experience depending on how much it takes for your Vue components to load or re-render.

To make it more reliable it’s much better to “cut” this script evaluation into pieces and see if there is user input to be processed after each of them.

This way app will remain responsive no matter how many renders or re-renders need to happen.

That's exactly how it’ll work in Vue 3. This is how Evan You presented the Time Slicing feature in Vue 3.

Summary

Noticed the small gaps in the script execution timeline, these are meant to handle user input.

Tools are equally important as out of the box performance. According to this, we can see a new lifecycle hook in Vue 3 - renderTriggered. We can use it to track and eliminate unnecessary component re-renders, which is a very powerful weapon in runtime performance optimization when we combine it with Time Slicing.

There is much more than what you’ve seen above in Vue 3, but those are probably the most impactful changes. The majority of unmentioned improvements will lie hidden in the code generated by the Vue compiler or is tied to implementation details and algorithms.

There are few improvements worth mentioning though:. Output code will be easier to optimize for JavaScript compiler.

Output code will be generally much better optimized.

  • Unnecessary parent / children re-renders will be avoided due to improved patching algorithms .
  • Also, in upcoming days, you can expect an in-depth article from Evan You about performance optimizations they made specifically for Vue compiler (I’ll update the article with a link once it’s published).
  • Even though Vue is already established as one of the best-performing frameworks out there, we will see major improvements in the 3rd release.

Especially in its bundle size and runtime performance. There are also countless micro-optimizations made. I think Vue 3 fits perfectly in the modern mobile-first and performance-oriented web.

The vue create command

Don’t forget that Vue is the only major framework fully driven by the community.

All changes listed in this article (and many more) are discussed in the form of RFCs here together with the community.

You can help the core team and express your opinion about active RFCs or even propose your own improvements.

#13. Vue Router

Let’s make Vue better together 😉. In the next article, we will explore how new Vue 3 APIs will affect the way we’re writing web apps.

  • We will take a look at various APIs, including recently popular Composition API, and see how we can use it to write better and more maintainable code.
  • In this article, you’ll learn the fundamentals of Vue.js. Even though the article uses Vue 3, the fundamentals apply to older Vue versions too.

We’ll cover how to:. create a Vue application with Vue CLI. use conditional rendering.

Learning Platforms that provides Vue 3 Tutorial for beginners:

make use of dynamic CSS. handle user inputs and events. use methods and computed properties. use HTML attribute binding. We’ll start by creating a skeleton application with the CLI.

The Vue command-line interface allows us to create and configure new Vue projects from scratch. That is, instead of adding packages and configurations ourselves, the CLI does that for us. Let’s install the Vue command-line interface. The tutorial assumes you don’t have Vue CLI installed on your machine. To install it, run the following command:.

#8. Lifecycle Hooks

  • Alternatively, you can install it using Yarn as follows:.
  • Once you’ve run any of the above commands, the installation starts, and it will take a few seconds or minutes.
  • Once the installation finishes, you can create projects with the following command:.
  • Once we’ve run the vue create command, we’ll be prompted with a handful of questions.
  • The purpose of these questions is to configure the project to suit our needs.
  • Figure 1: The Vue CLI welcome screen.