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Today in Top Angular News – Thursday, September 13

Today in Top Angular News – Thursday, September 13

Today’s topics include Angular, frontend, webdev, webdeveloper, Developers, javascript, JustPublished, Firebase, Infragistics, IgniteUI, WebDevelopment, Vuejs, Angularjs, and FrontendFriday. Special thanks to contributors uncle_dallas, @nishu0505, Nishu Goel, +Juri Strumpflohner, Juri Strumpflohner, debug_mode, Juri Strumpflohner,, Mantra Malhotra, @rintoj, Rinto Jose, @saidhayani, SaidHayani@, and @luukgruijs, Luuk Gruijs.

Lazy Loading In Angular

Code splitting allows us to break our application into smaller modules (chunks). In a standard case when you login into the application through a login page or when your application startup page gets loaded, it actually downloads all the dependent Angular modules and dependencies. Implementing the lazy loading helps us to decrease the startup time of application and our application does not need to load everything at once. Let us take a module structure as below,

Normally in this scenario angular will load all the modules at once when the application starts, and this is exactly where the lazy loading comes into play. Let’s say we now want transport module, then it will be:

Now the user navigates to HR module, then it will be:

Now as we are not loading all the modules on one go it will decrease the startup time and will make our application more efficient. Continue reading

Using @ViewChild in Angular – Nishu Goel – Medium

Using @ViewChild in Angular
A ViewChild is a component, directive, or element as a part of a template. If we want to access a child component, directive, DOM element inside the parent component, we use the decorator @ViewChild() in Angular. Since the child component can be located inside the parent component, it can accessed as @ViewChild. Continue reading

Learning Angular 2: Conditionally add styles to an element

Here we’re going through a couple of ways to conditionally apply some styles to a DOM element in Angular 2. A rather unconventional way would be to return the styling property as a string and then to directly set it on the desired element:

Note the in the code above. The allows us to gain access to the via

This way you can deliberately modify the properties of the native DOM element. Well, Angular 2 isn’t only build for the browser, but it can potentially also be rendered on the server or render native elements on a mobile device (via NativeScript for instance). So in this article you learned about three possibilities to style your DOM elements from within Angular 2. Continue reading

Tuning Angular’s Change Detection

I’m totally aware that there are already quite some good articles out there which go very deep into Angular’s change detection. Tero Parviainen had the same question and wrote an in depth article on the topic: Change And Its Detection In JavaScript Frameworks

In a nutshell, you usually have a model (i.e. a JavaScript object)…

…and some UI part (usually HTML) which visualizes the data of your model:

Change detection is the process of keeping both in sync. Whenever one of our asynchronous activities kicks in, say in the component, change detection is triggered from the root to the bottom. Continue reading

Top 10 JavaScript Charting Libraries For Your Web Development

Related Blog: 7 Blockchain Web Development Tools To Grow Your Stack
1) Flot
License: Free
Flot is one of the oldest charting libraries for web development and mainly focuses on the simple use and interactive features. 7) Highcharts
License: Free for non-commercial, paid for commercial uses
Highcharts is one of the popular interactive charting libraries for web development, and like others, it is based on HTML5 / SVG / VML, which means it does not require additional add-ons. Read More: 5 Ways Artificial Intelligence Can Improve Web Development
8) Sigma.js
License: Free
Sigma is one of the powerful JavaScript libraries for web development which mainly focused on presenting interactive graphs and networks for the web. Continue reading

Understanding, creating and subscribing to observables in Angular

  • Observables are a new way of pushing data in JavaScript.

Observables can have multiple values over time
Now if you keep that subscription to the newsletter open, you will get a new one every once and a while. An observable is a Producer of multiple values, “pushing” them to subscribers. On the parameter that was given when creating the observable there are three functions available to send data to the subscribers of the observable:
“next”: sends any value such as Numbers, Arrays or objects to it’s subscribers. During observable execution there can be an infinite calls to the, however when observer.error() or observer.complete() is called, the execution stops and no more data will be delivered to the subscribers. Continue reading

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