Angular 2 Lazy Loading

By Brian

  • The week, we want to dig into how to implement lazy loading in your Angular 2 application.
  • Remember that last week we implemented a View module and an Edit module.
  • Angular 2 Thoughts I was asked this past week what my thoughts were on Angular 2.
  • There is nothing in the code that tells us what component is supposed to load.
  • Lazy Loading was developed as a way of solving these issues and others.

If you are as confused by Angular 2 Lazy Loading as I was, you are going to love this article that demystifies the whole topic.

@JavaScriptKicks: Angular 2 Lazy Loading by davembush #javascript #angularjs via JavaScriptKicks

Last week when we took a look at Client side Routing, I mentioned that one of the reasons you’d want to implement a component in its own module is so that we could lazy load the component and its dependencies.

This week, we want to dig into how to implement lazy loading in your Angular 2 application.

What Is Lazy Loading?

Imagine that you’ve written an application that is divided into four main sections. The people using the site may only use one or two sections of the site at a time, or at all. Is it fair to make them download the entire site?

Or maybe you’ve written a monster site. Wouldn’t it make more sense to download only what you need as you need it? The perceived performance of a site written like this far exceeds the performance of a site that requires you to download everything at once.

And so, Lazy Loading was developed as a way of solving these issues and others. The idea is, rather than downloading everything, download only what is needed when it is needed.

Remember that last week we implemented a View module and an Edit module. We called them from our router by importing the modules and telling the router to load the components when a route was specified.

property in our route array.

import { NgModule } from [email protected] /core’; import { Routes, RouterModule } from [email protected] /router’; // import { ViewComponent } from ‘./view/view.component’; // import {ViewModule} from “./view/view.module”; // import {EditModule} from “./edit/edit.module”; // import {EditComponent} from “./edit/edit.component”; const routes: Routes = [ { path: ”, loadChildren: ‘./view/view.module#ViewModule’ //component: ViewComponent }, { path: ‘Add’, loadChildren: ‘./edit/edit.module#EditModule’ //component: EditComponent }, { path: ‘Edit/:id’, loadChildren: ‘./edit/edit.module#EditModule’ //component: EditComponent } ]; @NgModule({ imports: [ RouterModule.forRoot(routes) //ViewModule, //EditModule ], exports: [RouterModule], providers: [] }) export class GettingStartedWithAngular2RoutingModule { }

You’ll notice the format of the loadChildren string is:

But, there is nothing in the code that tells us what component is supposed to load. This is because the job of deciding what component to load has now been delegated to the module.

This is the part that remained a mystery to me for quite a while. I would look at the code demos but never saw the next part. Maybe this will save you some of that trouble.

In the view module, add this line to the imports array:

RouterModule.forChild([ {path: ”, component: ViewComponent} ])

Notice that we are using forChild here instead of forRoot but otherwise this looks the same as what we originally had for the View component prior to implementing lazy loading.

We can implement a similar line in the EditModule, except the component will be EditComponent.

RouterModule.forChild([ {path: ”, component: EditComponent} ])

because I want to show you what is happening under the hood.

file. These files hold the module and dependencies that we’ve lazy loaded.

If you load the application with the developer tools loaded and look at the network tab, you’ll see that one chunk is loaded immediately, for the view. The other is loaded when you navigate to the add or edit path.

Angular 2 Lazy Loading

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The BugTrapper Daily

By Brian

  • A selection of articles, blog posts, videos and photos recommended by Tadit Dash
  • The BugTrapper Daily
  • Please enable Javascript to correctly display the content on Paper.li
  • © Finity SA 2016

A selection of articles, blog posts, videos and photos recommended by Tadit Dash

@taditdash: The latest The BugTrapper Daily! Thanks to @taxindexorg @NctNct2016 @debasiskolsaha #angularjs #javascript

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The BugTrapper Daily

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fix(dateparser): add new date format for angular 1.5+ only · angular-ui/bootstrap@f2722b5 · GitHub

By Brian

  • fix(dateparser): add new date format for angular 1.5+ only
  • – Only add parsing ability for new date format for angular 1.5+ Fixes #6349
  • If you are using IE 11, make sure you turn off “Compatibility View” .
  • We recommend upgrading to the latest Internet Explorer , Google Chrome , or Firefox .
  • Personal Open source Business Explore

Native AngularJS (Angular) directives for Bootstrap. Smaller footprint (20kB gzipped), no 3rd party JS dependencies (jQuery, bootstrap JS) required. Please read the README.md file before submitting an issue!

@gitbootstrap: Bootstrap – AngularJS directives: fix(dateparser): add new date format for angular 1.5+ only

Please note that GitHub no longer supports old versions of Firefox.

We recommend upgrading to the latest Safari, Google Chrome, or Firefox.

– Only add parsing ability for new date format for angular 1.5+ Fixes #6349

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fix(dateparser): add new date format for angular 1.5+ only · angular-ui/bootstrap@f2722b5 · GitHub

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Angularjs Tutorial

By Brian

  • Watch YouTube videos with Chrome.
  • Yes, get Chrome now .
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A comprehensive tutorial/training on Angular.js. Covers: Controllers, Scope, $scope, Scope Inheritance, RootScope, Data Binding, AJAX, Factory vs Service vs …

@RakeshYadvanshi: I saved a @YouTube playlist Angularjs Tutorial

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

Angularjs Tutorial

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Amazon: A Smarter Way to Learn JavaScript: The new approach that uses technology to cut your effort in half eBook: Mark Myers: Kindle Store

By Brian

  • Format: Kindle Edition Verified Purchase
  • Read the Kindle edition on any Kindle device or with a free Kindle Reading App .
  • A Smarter Way to Learn HTML & CSS: Learn it faster.
  • A Smarter Way to Learn jQuery: Learn it faster.
  • You can also see more Kindle MatchBook titles or look up all of your Kindle MatchBook titles .

Buy A Smarter Way to Learn JavaScript: The new approach that uses technology to cut your effort in half: Read 1398 Books Reviews – Amazon.com

@JavascriptBot_: A Smarter Way To Learn Javascript: The New Approach That Uses Technology To Cut You here #angularjs @javascriptbot_

Format: Kindle Edition Verified Purchase

I have tried udemy courses as well as tuts premium courses but somehow the teachers go straight into complicated stuff I don’t quite get. This ebook is the perfect book for anyone wanting to learn javascript. As a matter of fact, most of those tutorials online don’t go into the simple details like this ebook does. I finally know how to splice, slice, push, pop, shift and unshift an Array. It’s also hard to forget this stuff when you right away get coding on Mark’s website.

As part of my learning, I’m also taking another class by Jeff Escalante, it’s called “Making Kittens fly with JavaScript”, I’m learning so much already because his course actually involves building a project from scratch. I tried learning javascript before from the “Eloquent Javascript” book and it was more intermediate than beginners so hopefully once I’m done with a smarter way to learn javascript and the other class I’m taking, I’ll be able to finally understand the content of that book.

And for those of you who want to take their javascript knowledge to the next level, I recommend you start with THINKFUL school, it’s an online school that focuses on front end and also involves doing projects from scratch in pure javascript, jquery and ajax. I’m planning to enroll once I finish this ebook, my other class, and the eloquent javascript book.

I recommend this ebook in the meantime to understand javascript better as you start getting into more advanced stuff in other courses. This book will really push you to learn the javascript fundamentals at last.

Format: Kindle Edition

This isn’t an ebook so much as it is a mini-course, and as such it is incredibly good value. Myers teaches you how to program using JavaScript, and does so in a very easy-to-follow, well-thought-out way. Each concept is carefully broken down and clearly explained in a bite-sized lesson; it is then followed up by exercises you can do in a little “sandbox” environment he provides. This learn and then do approach is very effective and helps the concepts stick. The sandboxes are handy because you can play with what you just learned immediately in a safe place.

I also appreciated his writing style in this book: he is very clear, but also quite lively, and the book is never dry. He is also politely firm in his instructions in a way that makes him sound confident of your eventual success. If you have ever wanted to learn how to program, or even if you just want to understand more of what your programmers are telling you, this is a great place to start.

Format: Kindle Edition

In creating his ebook “A Smarter Way to Learn JavaScript”, Mark Myers has done something I have never seen done before in an ebook. He has created the equivalent of an interactive tool that allows him to “reach” across the Internet and give you hands-on instruction to facilitate learning JavaScript. He has accomplished this in three ways. First, he has adopted a relaxed vs. formal language in his text, giving you the impression of learning JavaScript with a friend sitting next to you at the computer, as opposed to being in a formal classroom setting with a teacher. Second, he has broken down the elements of the syllabus into small, easy-to-capture lessons that aid in learning one concept at a time. Third, he has incorporated an interactive quiz / lesson recap tool that reinforces the lesson just completed, thus cementing your learning of the JavaScript language as you progress. Closely coupled with this is the fact that this ebook amounts to a home-study course, allowing you to complete your indoctrination to JavaScript at your leisure and in an environment of your choosing. As someone whose software knowledge has been limited to use of packaged software like MS Office and the like, I was surprised to find myself learning and coding in JavaScript as I progressed through the lessons. Mark has created a truly innovative way to learn JavaScript, leading to my high recommendation of this ebook to anyone, of any age, interested in mastering this software language.

Format: Kindle Edition Verified Purchase

Mark Myers is a genius and his simple method could literally change the way we learn to code in the future. As someone who has done it all…read numerous books, watched both paid and free video courses online, done the various free online tutorials and invested thousands at a programming bootcamp…I can say truthfully say that this is the most effective method I have ran across to date.

The short bite-sized snippets of information (known as chapters) are just enough where my brain can consume the info without becoming overwhelmed or shutting off. The interactive exercises that are presented at the end of each chapter then drive the principles of that chapter home but most importantly get your fingers used to typing and becoming familiar with the language and syntax. The timed exercises are also genius as it means that I now have to recall the information at a decent and comfortable speed.

Each lesson somewhat builds on principles (and cleverly integrates) what you have learned from past chapters so you never really get the chance to forget what you previously learned although there are 80-something chapters. At about half-way through the book I now find myself being able to understand and read code much more comfortably and fluently and I can’t wait to see what my level will be once I finish. If you’re thinking of learning how to program in JavaScript, I promise, this is the ONLY way to go.

Wow. I’ve tried a bunch of different books and online courses on learning JS and, by far, my favorite has been this one. Read more

Before I can urge my youngster to learn Javascript – I must put my toe in the water. I can read it but not write it. Now, I am well on the way to learning to write it. Read more

A smarter way to learn JavaScript has been instrumental in helping me add a new programming language to my repertoire. Read more

Fantastic book, with great exercises to go along with it. Highly recommend it!

This is the first time I am reading a language book that includes so much interactive exercises. Sometimes the repetition of the exercises bores me, but I believe this is what… Read more

Have been a software engineer for quite some time, but not in JavaScript. I found this book to be quite easy to understand (overall) and the author (Mark Meyers) walks us through… Read more

The book is an amazing entry level approach to learn JS if you actually do the online exercises… However, the online exercises seem to be poorly coded. Read more

Good book to learn JavaScript for the first time OR refresh your knowledge if you have learned JavaScript but haven’t used it for a while. Read more

Can’t say enough about this teaching method! It builds one step at a time on your previous learning making coding in this language much easier to learn…. Read more

I’ve tried several books and online programming courses but information never seems to “stick”. Read more

Amazon: A Smarter Way to Learn JavaScript: The new approach that uses technology to cut your effort in half eBook: Mark Myers: Kindle Store

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Welcome to the State of the Developer Nation survey

By Brian

  • I’m very happy, because I’m winner of a prize for participated in Developer Tools Benchmarking 2016 survey, Thanks @visionmobile
  • The State of the Developer Nation survey is the 12th Developer Economics survey by research firm VisionMobile.
  • Developer Economics is the largest independent survey.
  • All participants who complete the survey enter a prize draw (held in January).
  • We partner with the organisations, big and small, to make sure we have a representative sample across all developers.

The State of the Developer Nation survey is an independent survey tracking all trends on development, across tools, platforms, developer skills, salaries & more!

@giveawasy: #AngularJS devs Enter dev survey > Win #Unity3d plus subscription #nodejs #js #javascript…

TL:DR: It’s a survey made by developers, so the questions will be relevant plus you will get to learn something new – and it only takes 15 minutes!

We have a load of cool prizes up for grabs, including an Oculus Rift headset, a Pixel Phone, Udemy courses and many, many more. All participants who complete the survey enter a prize draw (held in January).

We’ll make the key findings from this survey available as a free report in February. After completing the survey, you’ll also get the chance to see how your responses compare to other devs’ in your country.

This is a survey that’s actually fun! Once you complete it, you’ll get to find out what kind of character you’d be in a fantasy world, based on your responses: A mage? A bard? A dragon slayer? Take the survey and find out!

If you lived in a fantasy universe, would you be a mage, a ranger or a fighter?

This survey is now more personalised than ever before! As soon as you finish the survey, you’ll get a personalised profile based on your choices, showing what type of developer you are. Trust us – the results will be full of surprises!

I’m very happy, because I’m winner of a prize for participated in Developer Tools Benchmarking 2016 survey, Thanks @visionmobile

@DiogoDRdeSa

By winning this prize, you have given me the opportunity to learn more about new technologies that I always wanted to learn. Thank you very much once again

@polydefkis12

Mi principal herramienta de trabajo es SAP, pero esta encuesta ya me ha dado mas amplia visión sobre otras formas de desarrollar

This was the first time I had fun completing a survey! Good Job!

I’m always happy to help the profession and it’s nice to get something back like this!

@andydentperth

I’m working as a developer nearly seven months, so it could say that my level is staying between student and professional. All the answers based on my experiences an extended working time. After taking the survey, I have realized what learning path to improve more knowledge as a developer. Thanks for the review.

By winning this prize, you have given me the opportunity to learn more about new technologies that I always wanted to learn. Thank you very much once again

@polydefkis12

Mi principal herramienta de trabajo es SAP, pero esta encuesta ya me ha dado mas amplia visión sobre otras formas de desarrollar

This was the first time I had fun completing a survey! Good Job!

I’m always happy to help the profession and it’s nice to get something back like this!

@andydentperth

I’m working as a developer nearly seven months, so it could say that my level is staying between student and professional. All the answers based on my experiences an extended working time. After taking the survey, I have realized what learning path to improve more knowledge as a developer. Thanks for the review.

We have dozens of prizes up for grabs in this survey! All winners will be determined in a prize draw that will be held in January. Check out the different types of prizes

These are the top prizes included in the survey! There’s a prize for all tastes!

Software, passes to cool dev conferences, and access to online courses – all the resources a developer needs!

These are prizes reserved for members of our panel . Not a member of our panel? Not a problem, you can sign up during the survey.

Developer Economics is the largest independent survey. Our Media Partners, large and small, are important pillars in our outreach to the global developer community, helping us reach developers of all shapes and sizes. See below the list of Media Partners are who are supporting the outreach for this survey.

The State of the Developer Nation survey is the 12th Developer Economics survey by research firm VisionMobile. This is an independent survey, aimed at measuring the pulse of the developer community. This survey tracks all the latest trends on development, across development tools, platforms, developer skills, monetisation, salaries – and much more!

Developer Economics is the largest developer research program, reaching and engaging thousands of developers of all shapes and sizes across the globe. Our vision: help developers make better business decisions.

Our Developer Economics surveys reach over 30,000 developers per year across 150+ countries. We explore trends across all types of developers, from hobbyists to enterprise, and across different types of development: mobile, IoT, desktop, cloud, web, AR/VR, and machine learning.

Our surveys are supported by the entire developer community: from the largest Internet and software companies to the smallest local Meetups. We partner with these organisations, big and small, to make sure we have a representative sample across all developers. And our partners help us, in return, to make sure we deliver something valuable back to the community.

Welcome to the State of the Developer Nation survey

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Build a Website and Android application

By Brian

  • The application has to done as a web application as well as an android mobile application.
  • I am looking for someone who is skilled in Angularjs, Nodejs, MongoDB and mobile application and can complete project by monday afternoon.
  • The project is ending in 6 days and has an average bid price of $159 USD .
  • Hire Freelancers who also bid on this project
  • Work on projects like this and make money from home!

Mobile Phone & Android Projects for $159. I am looking for someone who is skilled in Angularjs, Nodejs, MongoDB and mobile application and can complete project by monday afternoon. Dec 12th. This application has to done as a web application a…

@JoindaHunt: Build a Website and Android application by davidraj542 I am looking for someone who is skilled in Angularjs, Nodej…

I am looking for someone who is skilled in Angularjs, Nodejs, MongoDB and mobile application and can complete project by monday afternoon. Dec 12th. This application has to done as a web application as well as an android mobile application.

Build a Website and Android application

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javascript

By Brian

  • If the answers do not fully address your question, please ask a new question .
  • It was built at Google and provides a way to quickly build large, single-page web applications.
  • AngularJS is a full frontend MVC framework for JavaScript web applications.
  • AngularJs is a framework for client side JavaScript.
  • Angular is a hip JavaScript framework which is made for building large, single-page web applications.

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

@NodeJsQnA: What are the differences between Node JS, Ext JS, AngularJS? #javascript #nodejs #angularjs #extjs

For starters , Node Js is not for front end development , its actually a server-side javascript language. – anwerjunaid Jul 22 ’14 at 14:58

AngularJs is a framework for client side JavaScript. It gets executed on the browser after a page has arrived in that browser, manipulating, adding things or creating cool effects. NodeJs is usually server-side. It uses JavaScript code, but uses it on the server in order to render pages before users’ browsers are even involved. It acts as web server software, and sends its pages to users’ browsers. AngularJs is faster than NodeJs. The programming paradigm in AngularJs is object-oriented, functional, & event-driven, while in NodeJs event is of higher priority than object-oriented programming. – Irshad Khan Sep 21 ’15 at 6:32

AngularJS

AngularJS is a full frontend MVC framework for JavaScript web applications. It was built at Google and provides a way to quickly build large, single-page web applications. Like jQuery, it is included into a page using the tag, and is itself written in JavaScript. Unlike jQuery, it is meant to be a framework upon which an entire web application is built. It actually includes a minimal version of jQuery by default.

If you’re looking to learn AngularJS, I recommend EggHead’s video tutorials. You’ll need to have a very solid understanding of JavaScript first, since writing any Angular requires a deep understanding of prototyping, scope, and various other JavaScript aspects.

The AngularJS website has a page of example projects built with AngularJS, if you’re so inclined.

Node.js

Remember how I told you that JavaScript ran in the browser, but I mentioned that there was one big exception to that? Node.js is that exception. It’s a command-line tool that runs JavaScript on a machine without needing to run in a browser. It does this by using a version of Chrome’s V8 Engine, which is the JavaScript engine that runs inside Google Chrome.

Before Node.js, developers would have to use different languages for the backend and frontend of their application. For example, PHP, Java, ASP.Net would run on the server, and JavaScript would run in the client browser. Now with Node.js, developers can use JavaScript on the server as well as the client, meaning that developers can focus on learning one language. Whether this is a good thing is still up for debate (nsfw language).

Angular is a hip JavaScript framework which is made for building large, single-page web applications.

Node.js allows JavaScript to be run without a browser, and is commonly used to run web servers.

For the original article from which I took this answer, go here.

For a table with the exact differences between the two, go here.

So first off, node.js is different from Ext JS and Angular JS.

According to the node.js website,

Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.

Its for your server-side components. For example, setting up a simple webserver or REST API’s.

Angular and EXT JS are client-side JavaScript frameworks that make use of MV architectures that are used for making web applications. Angular is considered a MVW (model-view-whatever) framework and Ext JS is a MVVM (Model-view-view-model) and MVC (Mode-view-controller). Ext JS recently added MVVM in their newest version Ext.js 5

Ext JS also adds to the core layers of building blocks this by adding components like responsive design styles, layouts, UI components, theming, and etc.

Although angular doesn’t have built in themes and UI, there are alot of modules/predefined directives that you can use like UI-Bootstrap. Angular itself is HTML declarative meaning it provides a dynamic way to use your HTML. For example,

This div would repeat through an array of items which will render each item as a div with the name as a header and the price as a paragraph element. If the item is available, it will render that div (or won’t render if available !== true)

Tying it all together, you can utilize node.js on your backend and angular/ext.js on your front end. For example, you can set up a simple REST api for products. Angular would then make an HTTP request on products, get JSON from your api, and then iterate through products and render it without loading a seperate page. You can also do this similarly in ext.js, but I am unsure of the exact approach for it.

If you want to make more realtime/dynamic web applications, doing this is a solid way to go.

javascript

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