5 Features To Watch Out For in Angular v4

“5 Features To Watch Out For in #Angular v4” by @scotch_io #javascript #AngularJS

  • They include but not all:

    Angular v4 is in RC; this means you can start using it in your project hoping that no breaking changes will be released at final.

  • With Angular v4 (RC), you can use the syntax to handle such case:

    Let’s have a look at a possibly realistic example:

    We are simulating an HTTP async request with Observable that returns a user payload if successful.

  • Now, TypeScript allows you to explicitly say a variable can have any of those types:

    The above example simple says:

    This feature is now compliant in Angular (v4), so you could do stuff like this:

    Server-side rendering is the act of spitting the same HTML content in virtual DOM to the server so that they are rendered appropriately by the browser on request.

  • The project was maintained entirely outside Angular, but from Angular v4 forward, Universal will become a core Angular module.
  • Angular v4 ships flattened versions of modules in the ECMAScript Module format.

By now, most probably, we have come in peace with the fact that Angular will be rolling out features using semantic versioning. This means…
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How To Debug an Angular 1 Application via DevTools

  • I’ll list a few important concepts, but for an in-depth tutorial on debugging JavaScript in the console I highly recommend reading through the DevTools documentation on you might set breakpoints to explore the code and check the value of variables mid-execution.
  • Recently, a friend asked me to help debug their Angular 1 application but I didn’t have immediate access to the source code and the deployed code was minified without source maps.
  • For illustration, here is the same statement executed against the Angular 1 TodoMVC app to list its controllers and providers:

    This snippet has come in handy many times.

  • Unlike providers, controllers are not registered on the application’s  instance.
  • To begin, select an element whose controller you want to inspect:

    Then via the console execute this line:

    Alternatively, you can use  to target an element and use the same code snippet:

    Once you’ve captured a reference to the controller for a particular element, you can inspect the scope and any properties attached to the controller itself and even explore up and down the scope tree to look for shadowed properties and explore child scopes.

The browser provides powerful tools for debugging web applications, including those built with Angular 1. I’ll list a few important concepts, but for an in-depth tutorial on debugging JavaScript in the console I highly recommend reading through the DevTools documentation on developers.google.com.
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Form Debugging With AngularJS Batarang

Form #Debugging With #AngularJS Batarang via @CsharpCorner  #Angular #Angular2

  • Angular Batarang is a tool for watching the scope of Angularjs (Angular1.x) Applications .
  • I highly recommend you use Batarang for watch scope and form validation status.
  • Figure 3: Watch Scope

    Major advantage of Batarang is you can view the form validation status.

  • Batarang shows a clear picture of your application from root scope to every single model value.
  • For Mozilla, Firefox lovers cannot use Angular Batarang but some 3rd party (AngScope) add-ons are available to inspect the scope of AngularJS Application.

This blog helps you to understand form debugging with AngularJS Batarang.
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angular-dynamic-forms

angular-dynamic-forms | Module to build forms from #JSON schemas  #AngularJS #javascript

  • You invoke the directive using an element ( ) – other options (such as class, attribute, and comment) are unsupported (for now).
  • In accordance with how AngularJS handles this attribute elsewhere, your entire form’s data will be available in keys of whichever model you specify here (though nested forms are an exception, unless you specify a key in the outer form’s model as the [ ][] of the inner form).
  • Any other attributes you specify on the element are copied across to the or [ ][] element that the directive builds to replace itself with.
  • This allows you to nest s inside each other in the same way as [ ][] (which is one reason this directive implements this pseudo-transclusion).
  • The directive makes every attempt to set up the forms it generates to be valid HTML forms, complete with the ability to have their data submitted to the server by the browser’s native form submission mechanism and still have the data in the same structure that it takes on in your AngularJS models.

angular-dynamic-forms is an angular-js module for building Forms in AngularJS From JSON schemas.
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Form Debugging With AngularJS Batarang

Form #Debugging With #AngularJS Batarang via @CsharpCorner  #Angular #Angular2

  • Angular Batarang is a tool for watching the scope of Angularjs (Angular1.x) Applications .
  • I highly recommend you use Batarang for watch scope and form validation status.
  • Figure 3: Watch Scope

    Major advantage of Batarang is you can view the form validation status.

  • Batarang shows a clear picture of your application from root scope to every single model value.
  • For Mozilla, Firefox lovers cannot use Angular Batarang but some 3rd party (AngScope) add-ons are available to inspect the scope of AngularJS Application.

This blog helps you to understand form debugging with AngularJS Batarang.
Continue reading “Form Debugging With AngularJS Batarang”

AngularJS Tutorial

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Easy guide to AngularJS offline tutorial
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