Angular 8 Update using Ng-Update & Angular CLI v8

Angular 8 Update using Ng-Update & Angular CLI v8

In this article, you’ll learn about the required steps that you need to follow to appropriately migrate your existing Angular apps to Angular 8

In this article, you’ll learn about the required steps that you need to follow to appropriately migrate your existing Angular apps to Angular 8

Upgrade or update Angular 7 to Angular 8 is now easier than ever before, thanks to all the work that has been done in version 8 and the ng update command which allows you to update specific versions and dependencies.

Angular 8 is released with many new features for the core framework and the other libraries like Angular Material. The new version depends on the latest version of TypeScript and Node. Let's see how we can update the CLI to Angular CLI 8 and upgrade an existing project from using version 7 to Angular 8.

What is ng update?

ng update is a command available from Angular CLI used to update your application and its dependencies. You can use it to update all packages in the package.json file via the --all option that could take true and false or specific versions via the --packages option. You can see all available commands from the official docs.

How to Update/Upgrade to Angular 8

For most use cases and thanks to the work done in Angular 8, you can upgrade to the latest release using one command:

$ ng update @angular/cli @angular/core 

If you have issues. You can also check update.angular.io for more details.

How to Update/Upgrade to Angular 7

You can find more details about the update process from the update.angular.io official website.

Thanks to all the improvements done in Angular 6, it's now easier than ever to update to the latest version.

In most cases, you can update to v7 by running one simple command:

$ ng update @angular/cli @angular/core 

If you still need more details on the process, follow the next sections:

Updating from Angular 6 to Angular 7 (Basic Apps)

if your project is basic, you can simply try the following steps:

  • First, you need to remove the deprecated features of RxJS 6 using the auto-update rules from rxjs-tslint. You simply need to install the tool globally using the npm install -g rxjs-tslint command then run the rxjs-5-to-6-migrate -p src/tsconfig.app.json from the root of your project. Once it's done you can remove the rxjs-compat library.
  • Finally you simply have to run the ng update @angular/cli @angular/core command to update to v7 the core framework and the CLI.
Updating Advanced Apps

If your project uses advanced APIs like HTTP, you need to replace the old HttpModule and the Http service (which was deprecated in v6) with the new HttpClientModule and the HttpClient service that brings a lot of new powerful features.

Also if your applicaton makes use of the Angular Service worker, you need to migrate any versionedFiles to the files array.

Aside from what's stated above, you don't need to perform any changes in your project to migrate from v6.1 to v7.

Instructions for Old Angular Versions

Throughout this tutorial guide, you'll learn by example how you can update or migrate your Angular 5 project generated by Angular CLI to use Angular 6 (The latest version) and Angular CLI 6. We'll take you step by step to upgrade your existing Angular 5 projects (can be also applied to Angular 2 or Angular 4) to use the latest Angular features and dependencies.

In nutshell, these are the steps:

  • Update your Node.js to version 8 or later required by Angular 6
  • Update Http to HttpClient introduced in Angular 4.3+
  • Update animations import from @angular/core to @angular/animations
  • Update or install the Angular CLI to version 6 globally and locally per project
  • Displays packages that need updating using ng update
  • Update core packages using ng update @angular/core
  • Update RxJS package using ng update rxjs
  • Update Angular Material, if used, using ng update @angular/material
Requirements

Before you can update/upgrade your Angular 5 project, make sure you have the following requirements:

  • NodeJS 8+ installed on your machine
  • You are using the new Angular 4.3+ HttpClient and HttpClientModule. If that's not the case then don't worry the process is simple and transparent just replace HttpModule with HttpClientModule and use Http with HttpClient
  • You are importing animations from @angular/animations instead of @angular/core
Installing or Updating the Angular CLI to Version 6

Updating the Angular CLI is easy and it's a matter of installing the latest version from npm using the following command:

npm install -g @angular/cli 

You may need to add sudo depending on your npm configuration.

Also it goes without saying that you need Node.js 8+ and NPM installed on your system to be able to install and run Angular CLI 6.

Updating Angular 5 CLI to Version 6 (Method 2)

You can also uninstall the previous Angular CLI 5 version before you install the latest version using the following command:

npm uninstall -g angular-cli
npm cache clean   

Next run the npm install command globally:

npm install -g @angular/cli 

Upgrading Angular 4|5 Projects

First, start by installing the Angular CLI 6 locally using the following command (Make sure you are inside your project's root folder):

npm install @angular/[email protected] 

Updating Configuration Files

There are many differences between Angular 4|5 and Angular 6 such as

  • Angular 6 uses angular.json instead of angular-cli.json.
  • Different versions of dependencies in package.json etc.

You can update different configuration files automatically by running the following command from the project's root folder:

ng update @angular/cli 

Discovering Packages to Update

Angular CLI has a new utility that allows you to automatcially analyze your project's package.json file and displays dependencies that need to be updated.

Using you terminal from the root folder of your Angular 5 project run the following command:

ng update 

This is an example output from this command:

Upgrading Core Packages to Angular 6

Now you need to update the core packages/dependencies to Angular 6. Simply run the following command:

ng update @angular/core 

Upgrading RxJS

You can update RxJS using the ng update command:

ng update rxjs 

Upgrading Angular 2 Projects

Now how about existing Angular 2 projects, generated using the Angular CLI?

You can easily update them to use latest dependencies by following these instructions:

First check your versions of installed Angular CLI and other dependencies with:

ng --version 

In my case, I'm getting this output:

    @angular/cli: 1.0.0
    node: 7.9.0
    os: linux ia32
    @angular/animations: 4.1.2
    @angular/common: 4.1.2
    @angular/compiler: 4.1.2
    @angular/core: 4.1.2
    @angular/forms: 4.1.2
    @angular/http: 4.1.2
    @angular/platform-browser: 4.1.2
    @angular/platform-browser-dynamic: 4.1.2
    @angular/platform-server: 4.1.2
    @angular/router: 4.1.2
    @angular/cli: 1.0.0
    @angular/compiler-cli: 4.1.2

Since we have installed the latest Angular CLI globally. If you try to serve your project you'll be getting a warning of version mismatch:

Your global Angular CLI version (1.2.5) is greater than your local
version (1.0.0). The local Angular CLI version is used.
To disable this warning use "ng set --global warnings.versionMismatch=false".

Next open your project package.json file then change the Angular CLI version: You can check the npm info page for Angular CLI package from this link to find out the latest version.

 "@angular/cli": "1.2.5" 

Next, delete your project node_modules folder and run the following command:

npm install 

You don't need to change the versions of the other dependencies, the Angular CLI will take care of fetching latest versions.

Now you can check again for installed versions with:

ng --version 

In my case I'm getting this output:

    @angular/cli: 1.2.5
    node: 7.9.0
    os: linux ia32
    @angular/animations: 4.3.1
    @angular/common: 4.3.1
    @angular/compiler: 4.3.1
    @angular/core: 4.3.1
    @angular/forms: 4.3.1
    @angular/http: 4.3.1
    @angular/platform-browser: 4.3.1
    @angular/platform-browser-dynamic: 4.3.1
    @angular/platform-server: 4.3.1
    @angular/router: 4.3.1
    @angular/cli: 1.2.5
    @angular/compiler-cli: 4.3.1

As you can see Angular 4.3.1 is installed.

Conclusion

In this tutorial, we've seen step by step how to ng update the Angular CLI to version 6, how to upgrade an existing Angular 2 to Angular 4 and An Angular 4|5 to Angular 6.

Node vs Angular : Comparing Two Strong JavaScript Technologies

Just from being a simple client-side scripting language, JavaScript has evolved over the years to turn out to be a powerful programming language. Here Node.js is a cross-platform runtime environment while AngularJS is one of the top JavaScript framework. Angular helps the developers to build web applications which are dynamic in nature using HTML template language and following the MVC design pattern.

An Angular Roadmap — The Past, Present, and Future of Angular

An Angular Roadmap — The Past, Present, and Future of Angular

✅Interested in being an Angular developer in 2019? ... blog post it's most likely that you've written some code in javaScript in the past.

Paleolithic JavaScript — SproutCore

In the beginning, there was SproutCore. It was the first comprehensive JavaScript framework aimed at making it easy to build desktop-quality single-page web apps. It’s not that this wasn’t possible before. When Google released Gmail, it showed the world that web apps really could replace complex desktop applications. Google even open-sourced the Closure toolkit — a set of libraries and an optimizing compiler that it used to build Gmail.

The problem was that Google’s Closure tools weren’t very developer-friendly. They relied heavily on Java, which alienated web developers who were used to working with JavaScript, PHP, Ruby, and Python. Gmail was a great demonstration of what was possible, but developing similar applications still felt out of reach for many.

Some courageous developers managed to string together amazing single page apps using a combination of jQuery, duct tape, and hope. While these apps looked amazing to end-users, for the developers working on them, the apps quickly turned into hulking piles of technical debt that made the dev team dread heading to work in the morning.

As a result, a few enterprising developers began to work on frameworks that would bring Gmail-like apps within easy reach of web developers everywhere. SproutCore was the first of these frameworks to take off. It came with a complete set of widgets that made it possible to build complex web applications without even touching HTML or CSS.

This ended up being great for former desktop developers who had been dragged kicking and screaming onto the web. Several more frameworks popped up with similar goals; GWT and Cappuccino were the most prominent. These frameworks even avoided JavaScript by transpiling other languages into JS. Again, this was great for desktop developers. But it left passionate web developers out in the cold and made them feel as though their hard-won HTML, CSS, and JavaScript skills weren’t valuable.

This left an opening for a framework that truly embraced the web, instead of trying to plaster over it and pretend it was something else. A couple of early frameworks (Backbone and Knockout) appeared, and achieved a moderate amount of success. Ember also showed up around this time. It took SproutCore, stripped it down to its bones, and tried to rebuild it into something truly web-friendly. Ember wanted to be the Six Million Dollar Man of the JavaScript world: rebuilt better, stronger, and faster.

None of these frameworks rocketed to popularity. The world was waiting for something better. In 2010, that something better appeared — it was named Angular.

The Golden Age of Angular

Even before Angular version 1.0 had been released, Angular took the front-end development world by storm. Finally, we had an easy-to-use JavaScript framework that treated HTML as a first-class citizen. Developers and designers could now work together to build amazing single-page applications. This came as a relief to designers, who had been annoyed and offended because older frameworks had treated HTML and CSS as tools for barbarians, tools that no civilized developer should have to touch.

The first thing that seemed magical to developers trying Angular for the first time was two-way data binding. Prior to this, most developers had only seen this kind of data binding in desktop frameworks like WPF and Windows Forms. It was great to be able to bind forms and other UI elements to JavaScript model objects. While two-way data binding could cause performance problems when overused, teams that used it judiciously found that Angular enabled them to create complex front-end applications much more quickly than ever before.

Angular proved to be popular for more than just easy binding of data to HTML elements. Angular directives provided an easy way to create reusable HTML + CSS components. Although other JavaScript frameworks provided this before Angular, Angular was the first one that became extremely popular. Reusable components had long been in-use in server-side frameworks. ASP.NET user controls and partial templates in Rails and Django are but a few examples.

Finally, Angular made dependency injection popular in the front-end development world. Dependency injection had long been popular in enterprise applications, which is perhaps why it hadn’t caught on in the JavaScript world. Front-end developers have long been averse to what they see as needlessly complex enterprise software design patterns. This concern isn’t without merit. Have you ever, in the course of writing an application, said to yourself “What I really need here is a “SimpleBeanFactoryAwareAspectInstanceFactory?”

Dependency injection, though, has proven its worth. And Angular made dependency injection easy to use for an audience that hadn’t used it much in the past. Need an HTTP client? Or perhaps you’d like to do some animation? No problem. Angular had built-in services for those. Just ask for them, and Angular would inject them into your components. No need to instantiate anything yourself.

Or perhaps you wanted to use the browser’s window or location objects without making it impossible to unit test your components outside of a browser? Angular had you covered there too, with its built-in $window and $location services. At runtime, you’d get the browser objects you were expecting. And when running unit tests server-side in Node.js, you could pass mock services into your components to ensure they behaved as expected in various scenarios.

If all of this wasn’t enough, Angular also made it simple to register and inject your own services. For developers who were used to binding all their data to the DOM and hoping for the best, this was awesome. If you were writing a new front-end app that called for APIs that would cost your company a lot of money if overused, you’d probably prefer to be able to write tests ahead of time to ensure that your application doesn’t try to do something like calling the Twilio API 800 million times.

So you’d create a Twilio service that gets injected at runtime. At testing time, you’d create a mock service that records the cost of every API call your application is trying to make. You’d write tests that cover common usage scenarios and ensure that these scenarios don’t result in your company receiving a 7-figure bill. Overall, most developers found that Angular directives combined with dependency injection made it possible to write modular, testable front-end applications using tried-and-true software engineering techniques. Many development teams decided that this resulted in a happy state of affairs, and decided to go all-in on Angular.

The Angular Decline? The Rise of React

While things were mostly great in the world of Angular, it wasn’t all sunshine and lollipops. Developers were starting to run into severe performance problems when they tried to bind too many model objects to too many DOM elements. Some applications slowed to a crawl. Direct calls to $digest and other black-magic sorcery started becoming necessary to achieve acceptable performance. Around the same time, a new challenger appeared: React. At first, React didn’t seem to pose too large a danger to Angular. After all, these React weirdos had gone to the trouble of inventing JSX, which looked a lot like a way to mix markup into your code. Hadn’t we gone to a lot of trouble to invent templating languages for the explicit reason of avoiding mixing markup and code?

As it turned out, React’s approach was pretty popular in the front-end development community. It didn’t rocket to popularity, however. Angular was still dominant, and it looked like it would remain that way. Until that is, Angular’s popularity was given a good kick in the teeth from an unexpected source: the Angular team itself.

The Introduction of Angular 2

Angular 2 was first announced at the ng-europe conference in 2014. The Angular team’s plans came as a shock to the Angular community, to say the least. Reaction from Angular developers was swift and negative… and not without reason. Angular 2 would be getting rid of many familiar concepts from Angular 1, introducing a new, incompatible templating language (and oh, by the way) would also be programmed using an entirely new language.

AngularJS

Although both Angular 1 and Angular 2 were called ‘Angular,’ in reality, they were very different frameworks with a few things in common. To help prevent confusion, the Angular team started referring to the old version of Angular as ‘AngularJS’, and the new version as simply ‘Angular.’ This makes intuitive sense since AngularJS was written in JavaScript, and Angular was not. To keep the distinction between the frameworks clear, I’ll be referring to Angular 1 as AngularJS from this point forward.

As a result of all of this, AngularJS developers lost faith in the framework’s future. They threatened to move to a new framework on future projects, and that is precisely what many of them did. React was the biggest beneficiary of the mass exodus from AngularJS.

Although React didn’t do as much as AngularJS, in a way that was positive. If you’re using a view library that doesn’t try to include everything plus the kitchen sink, it’s a lot more difficult for the developers of that library to pull the rug out from under you in the future. In the beginning, using React was a bit of a pain compared to AngularJS. You had to cobble together a patchwork of libraries just to cover the functionality the AngularJS provided out of the box.

Many teams saw this as a good way to reduce risk, because it was unlikely that the developers of all of those libraries would decide to make backward incompatible breaking changes at the same time, which is essentially what Angular had done.

The Emergence of Vue

To compound AngularJS’ woes, another framework named Vue showed up at about the same time the drama over Angular 2 was occurring. Vue was inspired by AngularJS but aimed to simplify it and get rid of what Vue’s creator saw as unnecessary complexity (so Vue felt very familiar to existing AngularJS developers). Vue provided a safe haven for many AngularJS developers who didn’t want to move over to React.

This doesn’t mean that AngularJS developers were not waiting patiently for Angular 2 to appear. But it’s clear that there was a mass exodus from AngularJS to React and Vue due to the uncertainty caused by the plans for Angular 2.

Rising From the Ashes with Angular 2

Eventually, Angular 2 was released. As expected, it did away with many familiar concepts from AngularJS but kept a few of the best pieces like services and dependency injection. Fortunately for the sanity of developers, Angular uses plain TypeScript and not a fork as originally planned.

To make things more confusing, the Angular team maintained a fork of the new framework that used the Dart programming language instead of TypeScript. Initially, the TypeScript and Dart versions were developed in sync, generated from a single code base. Eventually, the TS and Dart versions of Angular decided to go their separate ways, and Angular Dart now exists on its own.

Even with this confusion, Angular’s popularity began to increase again after the Angular 2 release. It happened slowly. As often occurs in software development, trends shifted. Developers realized that a big, batteries-included framework might actually be useful. After all, when your application grows large enough, you end up actually needing all of those batteries.

Enterprise developers, in particular, began moving back to Angular. This makes sense. Usually, when you start an enterprise web app, you know it is going to be complex. There’s no point in starting with a tiny MVP when you know from the beginning all 87 things your application is going to be expected to do.

Where’s Angular 3?

Although Angular 2 wasn’t perfect, many developers of complex web applications began to realize that the new-and-improved Angular was a good fit for their needs. Fortunately for them, Angular had some exciting improvements in store. More importantly, the Angular team demonstrated that it could consistently publish new versions of the framework with few breaking changes between versions

In a move that seemed odd at the time, the Angular team decided to skip version 3 entirely and move to version 4. This was done for good reason: the team working on Angular’s router package had already pushed ahead and released version 3, while the remainder of Angular was still at version 2.3. They decided to keep all Angular package versions in sync moving forward, and bumping everything up to version 4 for the next release was the easiest way to achieve this.

Angular 4

Angular 4 had some significant changes, including added ahead of time compilation, which resulted in small production JavaScript bundles and shorter application load time. Support for server-side rendering was added, which was a boost for teams that wanted to render their app ahead of time to improve initial load performance. Many other improvements were added throughout the framework, but upgrading apps from Angular 2 to 4 was quick and painless in most cases.

Angular 4.3 and Angular 5

Angular 4.3 added a new HTTP client that was easier to use than the old HTTP service. In Angular 5, the old HTTP service was deprecated and would be dropped in the next release. In spite of this inconvenience, there was relatively little grumbling because the upgrade in most cases was straightforward. Angular 5 also added better internationalization support and further build optimizations.

Angular 6 and 7

Angular 6 and 7 were disappointing to some developers. There were no large changes, but there were many small quality of life improvements, especially to the Angular CLI tooling. The decreasing number of visible changes isn’t an indication that the Angular team has stopped innovating. Instead, it shows that the framework is mature, so the development team is now free to do more work behind the scenes, fixing bugs and improving performance.

The stability of the framework since the release of Angular 2 has drawn some old-school AngularJS developers back into the Angular world. It has also attracted the attention of enterprise development teams. When you’re building enterprise apps that may live for decades it’s ideal to use a framework that gets new releases on a predictable schedule but doesn’t change too rapidly. A developer who had only used Angular 2 could be up and running and contributing to an Angular 7 app within minutes.

The Future of Angular

Angular 8 and Angular Ivy

And that brings us to today. As we’ve seen, Angular has come a long way. It has gone from loved by web developers to being reviled to being admired, although it isn’t yet loved again like it was in its early days.

On the horizon, we have Angular 8. A ton of work has been done in Angular 8 to make it easy to use with the Bazel build system, which is absolutely amazing news for all 3 developers who are using it outside of Google. More excitingly, though, the Angular team is hard at work on a new rendered called Angular Ivy. It’s intended to be a drop-in replacement for the current rendered. For the most part, current apps won’t need to make any changes to use Angular Ivy.

If Angular Ivy is a drop-in replacement, why should developers care? Two important reasons: speed, and bundle size — two very important concerns. For a few years, it seemed like web developers had gone a bit crazy. Teams were shipping JavaScript bundles that were 5MB, 10MB, or even larger, and thinking that there was no problem with this. After all, the applications worked perfectly on the developers’ i7-powered MacBook Pros so they should work fine for everyone, right?

Unfortunately, in the real world, not everyone is running the latest and greatest hardware. Hundreds of millions of people access the internet solely on older Android phones with slightly more processing power than a potato, through internet connections only a little faster than dial-up. For these users, a huge JavaScript bundle takes forever to load, and even longer for their device to parse and run. Even in less extreme cases, there are countless users around the world who aren’t using the latest and greatest hardware. For them, massive JavaScript apps are usable (but painful).

Angular Ivy Expectations

The Angular Ivy renderer will help in several ways:

  1. It is being written with an eye on efficiency, so it will accomplish the same tasks while executing far fewer CPU instructions. This will improve both the battery life and the sanity of users with less-than-powerful devices.
  2. The renderer will be written in a much more modular fashion that the current renderer. This will make it much more amenable to tree-shaking and dead code elimination. As a result, your production JavaScript bundle will include only the code that is needed to run your application, instead of bundling together everything plus the kitchen sink as often happens with the current rendered.
  3. In addition to the bundle-size reduction and improved rendering speed, Angular Ivy has another few quality-of-life enhancements for Angular developers. Rebuild times are significantly faster. So if you’re running your app in development mode and waiting for your changes to appear, you’re now going to be spending a lot less time waiting.
  4. Template-type checking is improved, which means you’ll catch more errors at compile time instead of at runtime. Runtime template bugs are annoying, because they either bite you during testing, or they bite your users when they’re trying to use your app.
  5. The Angular Ivy template compiler will generate code that is human readable, which the current View Engine compiler doesn’t do. This will come in handy when trying to track down tough template bugs.

The net result: smaller apps, faster apps, happier developers, and happier users.

Angular’s Past, Present, and Future

If you’ve been using Angular from its early days all the way until now, then congratulations! While there have been plenty of rough patches, we’ve ended up with a fast, modern framework that is fun to use.

If you were an AngularJS developer but moved on to React, Vue, or something else, I encourage you to give Angular another look. It’s worth your time, even if you decide to stick with what you’re using now.

And if you’ve never used Angular at all, why not give it a shot?

We’ve just been on a whirlwind tour through Angular’s past, present, and future. Without a doubt, it has been quite a ride. Regardless of your Angular background, I hope you’ve enjoyed the tour!

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