New features in Vue CLI 3.0

New features in Vue CLI 3.0

In this tutorial, learn about the new features shipping with Vue CLI 3.0. Understand the need for the new tool and the benefits of upgrading.

In this tutorial, learn about the new features shipping with Vue CLI 3.0. Understand the need for the new tool and the benefits of upgrading.

Vue JS created by Evan You and over 200 open source community lovers which has accumulated more than 121,000 stars on GitHub is a very progressive framework for building user interfaces. It consists of an approachable core library that focuses developers on the view layer of the web applications only, and an ecosystem of supporting libraries that helps you tackle complexity in large single-page applications.

A few months ago, Vue CLI version 3.0 was released by the Vue JS team. In this post, you will be shown all the exciting new features that this new version shipped with and notes on how to get started.

On the road to Vue version 3

As the Vue JS team is working on the next biggest version of Vue which will be version 3, a lot of momentum is being gathered as we wait. I think the CLI tool being in version 3 is most definitely in line with the Vue calendar for releases to match 3.0 when it finally comes out, this can be at any moment in 2019. Shortly after the release of the CLI version 3.0, Vue 2.6 was released. This was also strategic as it was released on the fifth anniversary of Vue.

Need for a new CLI tool

As Vue continues to record massive success in the adoption war among frontend JavaScriptframeworks, the team has made it a priority to continue to break down barriers to entry especially for beginners and people who are new to the Vue community. This prompted the decision to totally re-write the CLI tool because of the constant feedback from developers highlighting the struggles and sometimes confusion with lots of configuration while trying to bootstrap Vue projects. So, to bring even more clarity to the setup process, the new CLI tool was built.

Built for the future

This new version of the CLI has two distinct platforms of support that makes it very progressive and ahead of its time as the JavaScript community keeps evolving.

  1. Modern mode.
  2. Web components.
Modern mode

This is what the Vue team calls their new Babel incorporation into the CLI tool to accommodate all the newest JavaScript features in ES2015+ and at the same time still ship bundles with polyfills to cater for older and yet-to-be-updated browsers. When building for production with the following command:

    vue-cli-service build --modern

The Vue CLI will outputs two versions of the application: a modern version targeting modern browsers and a kind of legacy bundle supporting older browsers. There are no extra requirements to use the modern mode. The generated HTML file automatically employs the techniques discussed in Phillip Walton’s excellent post:

  • The modern bundle is loaded with <script type="module">, in browsers that support it; they are also preloaded using <link rel="modulepreload">instead.
  • The legacy bundle is loaded with <script nomodule>, which is ignored by browsers that support ES modules.
  • A fix for <script nomodule> in Safari 10 is also automatically injected.

After testing, a simple beginner app created with the Vue CLI shows that the modern bundle is 16% smaller than the normal bundle.

Web components

Vue components can now be built into web components with a line of command:

    vue-cli-service build --target wc --name my-element src/MyComponent.vue

A JavaScript bundle is generated registering the internal Vue component as a native custom element on the page, which can then be used as <my-element>. Multiple Vue components too can be built into a bundle with multiple chunks with this command:

    vue-cli-service build --target wc-async 'src/components/*.vue'

By including a small entry file from the resulting bundle, it registers all components as native custom elements, but only fetches the code for the underlying Vue component when the corresponding custom element is first instantiated on the page.

Instant prototyping

Sometimes, we do not really want to wait for npm installations or creation of a full fledged project to create a quick component. With the new CLI, you can now create standalone single file Vue components with all the powers of a Vue project from any file location in your machine - this is my favorite feature.

To be able to access this super feature, you have to install the Vue CLI service globally with this command:

    npm install -g @vue/cli-service-global

That’s all, you can go ahead and create a file anywhere on your machine. If your single file is called test.vue ``for instance then you can serve it on a development server just as you would with a complete Vue project with this command:

    vue serve test.vue

This spins up your Vue app in localhost, exactly as it will with a full project, awesome right?

Extensibility with plugins

This new CLI tool was re-written from the ground up to be plugin-based. This means that all the custom and default features like ESLint and Babel are treated as plugins. Plugins can inject dependencies and files during the app’s scaffolding phase, and tweak the app’s webpack config or inject additional commands to the CLI service during development. Plugins affect Vue core component and files and with the Plugin API by Vue, developers can create their own plugin. There is now a kind of plugin marketplace (think VS Code extensions) in Vue through the CLI. Plugins can be easily added using a line of command like this:

    vue add pluginName

Where pluginName can be TypeScript, Vuex or any other plugin. The add command acts exactly like it does in Angular with “ng add”. If you are interested in writing your own plugin, check out the plugin dev guide. The idea of choosing templates on startup is now a thing of the past, now you select presets: default presets or custom presets where you can choose your own plugins to get started with.

Graphical user interface

In the bid to totally break entry barriers to getting started with Vue, the Vue team also built a fully functional GUI tool for the CLI with a shiny looking configuration dashboard.

With this GUI tool, you can do almost everything you can with the CLI: create a project, serve it up, perform linting and even build it out for production. You can also install plugins and dependencies with it, also handle basic debugging and a whole lot more. The only thing I found was not yet supported in the GUI tool is accessing the single file Vue components. To use the GUI tool, you have to simply run the ui ``command in your machine:

    vue ui

The dashboard like the one pictured above would run on an available port on your localhost.

Rich features out-of-the-box

At the core, Vue CLI provides a pre-configured build setup built on top of webpack 4. To help reduce the amount of configuration developers have to go through, every Vue CLI 3 project comes with out-of-the-box support for:

  • Pre-configured webpack features such as hot module replacement, code-splitting, tree-shaking, efficient long term caching, error overlays, etc.
  • ES2017 transpilation (plus common proposals like object rest spread and dynamic import) and usage-based polyfills injection via Babel 7 + preset-env
  • Support for PostCSS (with autoprefixer enabled by default) and all major CSS pre-processors
  • Auto-generated HTML with hashed asset links and preload/prefetch resource hints
  • Modes and cascading environment variables via .env files
  • Modern mode: ship native ES2017+ bundle and legacy bundle in parallel (details below)
  • Multi-page mode: build an app with multiple HTML/JS entry points
  • Build targets: build Vue Single-File Components into a library or native web components (details below)

Also optionally, you can add these plugins to your preset on startup: **TypeScript **, PWA, Vue Router & Vuex, ESLint / TSLint / Prettier, Jest or Mocha, Cypress or Nightwatch and many others alike. Vue CLI makes sure all the above features work nicely together so that you do not have to do any config dirty work yourself.

Using Vue CLI 3.0

To use the new version 3, uninstall the old CLI tool:

    npm uninstall -g vue-cli

Then install the new CLI with this command:

    npm install -g @vue/cli

Also to create a new Vue project with the CLI, there is a new syntax:

    vue create myapp

Where myapp is the name of the** Vue app** you intend building.


You have been introduced to all the new features of the Vue CLI 3.0 and the reasoning behind the features. The GUI and the instant prototyping features are my personal favorites, what are yours?

What are the differences between the various JavaScript frameworks? E.g. Vue.js, Angular.js, React.js

What are the differences? Do they each have specific use contexts?

What are the differences? Do they each have specific use contexts?

Ember.js vs Vue.js - Which is JavaScript Framework Works Better for You

Ember.js vs Vue.js - Which is JavaScript Framework Works Better for You

In this article we will discuss full details and comparison of both Ember.js and Vue.js

JavaScript was initially created to work for web applications. But today they have become the favorite of mobile app developers. Most of the developers prefer to work with frameworks based on JavaScript. It simplifies coding. You can use JavaScript with almost any framework.

The use of a particular framework will decide how easy and fast it is to create the app. So, you must choose the best one suited for the app that you are planning to build. You must make a wise choice so that you benefit in the end. Among the crowded market, two of the frameworks stand out. We will make a comparison between Ember.js and Vue.js.

Why Do You Select A Particular Framework?

Before we start comparing the two frameworks, we should understand the factors that lead to the choice of a framework. Each developer chooses a framework before he or she goes to work on an app. Let us see the reasons for the selection.

● The codes must be easy to understand and transparent.

● The framework should give the maximum power with the least amount of coding.

● The framework should provide a well laid out structure to work on.

● Does the framework support an in-built router or an external plug-in router?

● The framework should be able to transfer more data on a full page-load so that it becomes a single-page app. A single-page app is more beneficial for the application.

● In single page architectures if there is a need for users to share links to sub-screens within the interface, then the framework should have the capacity to route based on the URL.

● A tighter template option can help in enabling two-way binding.

● The framework should not conflict any third-party library.

● Testing the codes inside the framework should be easy.

● The framework should provide the HTTP client service for AJAX calls

● The documentation is essential. It should be complete and up-to-date.

● The framework should be compatible with the latest version of the browser.

● The framework has to fulfill the above conditions for easy construction of the app. You must ensure that the framework you choose meets the conditions.

Vue.js Explained

Developers are always looking at new frameworks to build their apps. The main requirements are speed and low cost. The framework should be easy to use by even new developers. You should be able to use it at low cost. Other considerations are about simple coding, proper documentation, etc.

Vue.js combines a lot of good when it comes to software language for web app development. The architecture of Vue.js is easy to put in use. The apps developed using Vue.js are easy to integrate with new apps.

Vue.js is a very lightweight framework. It makes it fast to download. It is also much faster than other frameworks. The single-file component nature of the framework is also beneficial. The size has made it very popular.

You can further decrease weight. With Vue.js you can separate the template-to-virtual DOM and compiler. You can only deploy the minified and zipped interpreter which is only 12 KB. You can compile the templates in your machine.

Another significant advantage of Vue.js is that it can integrate easily with existing applications created with JavaScript. It will make it easy for using this framework to make changes to applications already present.

Vue.js also integrates easily with other front-end libraries. You can plug in another library and make up for any deficiency in this framework. This feature makes this tool a versatile one.

Vue.js uses the method of rendering on the streaming-side server. You can render your component and get a readable stream. You can then send this to the HTTP server. It makes the server highly responsive. Your users will get the rendered content very quickly.

Vue.js is very SEO friendly. As the framework supports server-side rendering, the views are rendered directly on the server. The search engines list these.

But the most important thing for you is the ease with which you can learn Vue.js. The structure is elementary. Even new developers will find it easy to use it to build their apps. This framework helps in developing both small and large templates. It helps to save a lot of time.

You can go back and check your errors very easily. You can travel back and inspect all the states apart from testing your components. It is another important feature as far as any developer is concerned.

Vue.js also has very detailed documentation. It helps in writing your applications very quickly. You can build a web page or app with the basic knowledge of HTML or JavaScript.

● Vue.js has pure architecture. It helps in integration with other apps

● Vue.js is lightweight and fast. It can be made lighter by deploying only the interpreter

● You can separate the compiler and the template-to-virtual DOM.

● Due to smooth integration, you can use this to make changes to existing apps

● To make up for any shortfall, you can plug-in any library and makeup.

● As Vue.js uses streaming-side server rendering, your users can get quick responses.

● The server-side rendering also helps in being ranked higher by search engines.

● It has a simple structure. Easy to use for any new developer

● You can go back and check and correct your errors.

● You can check all the existing states.

● Detail documentation also helps build the web page or application very quickly.

Ember.js Decoded

Ember.js is an MVVM model framework. It is open-source software. This platform is mostly used for creating complex multi-page applications. It maintains up-to-date features without discarding any of the old features.

With this framework, you have to follow the architecture of the framework strictly. The JS framework is very tightly organized. It reduces the flexibility that other frameworks might offer.

There is a very refined and developed control system for its platforms and tools. You can integrate it with the new version with the tools provided. There is strict guidance about avoiding outdated APIs.

You can understand Ember’s APIs easily. They are also easy to work. You can make use of highly complex functionalities simply and straightforwardly.

The performance is better as similar jobs are processed together. It creates batches of similar bindings and DOM updates to improve the performance. It means that the browser needs to process them in one go. It will avoid recomputing for each task, wasting a lot of time.

You can write the codes in a simple manner and modules. You can use any of Ember’s APIs. It is possible due to the presence of Promises everywhere.

Ember comes with a well-written guide. The API is recorded in a useful manner. It is a front-end framework that is loaded. Ember has a router, pipeline, services, etc. of its own.

The basis for views, controllers, models, and framework is the Ember Object Model. All components come from the same objects. The framework is firm and steady. The reason is that all elements have similar jobs and characteristics.

Ember has made the general application, organization, and structure clear so that you don’t make any mistakes. You will have no chance to complicate the application unnecessarily. If you have to go out of the defined limits, you will have to force your way out.

The language used for templating in Embers is Handlebars. This language helps Embers to keep its logic out of view. The clean syntax of Handlebars makes it easy for you to read and understand the templates. Handlebar templates are faster to load.

Another advantage you gain from Handlebar is that you don’t have to update your template every time you add or remove data from the page. It will be done automatically by the language itself.

A community that is continually improving the framework supports Ember. They are updating the framework with the latest technology. They also make sure that backward compatibility is possible.

● Ember.js is an open-source MVVM model framework suitable for complex multiple-page applications.

● It offers both the latest and old features.

● It has a very tightly structured framework which doesn’t offer much flexibility

● A very refined control system helps you to integrate with new versions without any problem.

● There is strict guidance about avoiding outdated API versions.

● Ember’s APIs help you to use complex functionalities in a simple manner

● There is no recomputing for each task as the framework allows the browser to do similar functions together.

● Promises allow you to write modular and straightforward code using any API of Ember.js.

● Ember.js is a fully loaded, front-end framework.

● The framework is stable because all components have the same functionalities and properties.

● It has well-defined limitations which will prevent your complicating your application

● Handlebars, the language used by Ember.js allows you to read and understand templates easily. It also helps to load the templates faster.

● Handlebars will ensure to update the template every time you add or remove data.

● Ember.js has an active community that updates the framework regularly and facilitates backward compatibility.

A Comparison Between Ember.js And Vue.js

This article intends to compare the features of both frameworks. Let us see how the characteristics of these frameworks compare. It will help you to make use of the right framework for your web application.

When you need a modern engine for an old application, it is Vue.js which will help you. It combines the best properties of other frameworks. Vue.js is a developing framework. A ready-to-use library of interface elements does not exist. However, many third-party libraries can help you.

Ember.js offers you a well-organized and trustworthy framework. When the development team is big, this is the framework that suits best. It allows everyone to understand the written code and contribute to a common project. The technology will be up-to-date, and the platform will be stable.

Vue.js can help you use the syntax of different kinds. It helps in writing the codes with ease. It is also an SEO friendly framework. Ember is a fully loaded front-end framework and can help you develop the applications very fast. But it is not suitable for developing small projects.

It is not easy to say this is better than that. It will depend on what kind of project you have undertaken. Both have their pluses and minuses. The below table will help in a better comparison.

Final Thoughts

It is not easy to conclude as to which is better. It all depends on the application that you want to develop. Both frameworks are developing. Both are getting updates. Both the communities are working on the frameworks.

While Vue.js is more comfortable for writing codes, Ember is a full-stack framework allowing the development of apps very fast. It is suitable for big projects. It is too complicated to be used for smaller projects.

We hope you had a great time reading this article. If you’ve any questions or suggestions related to this blog, then feel free to ask them in the comment section. Thank You.!