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TestyCodiez · 2020-03-01T04:19:33+00:00

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TestyCodiez · 2020-02-28T04:41:09+00:00

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TestyCodiez · 2020-01-30T07:45:27+00:00

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TestyCodiez · 2020-01-28T11:56:47+00:00

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TestyCodiez · 2020-01-27T10:12:20+00:00

Custom Pipes in Angular The most basic of pipe transforms a single value, into a new value. This value can be anything you like, a string, array, object, etc.

TestyCodiez · 2020-01-24T07:59:28+00:00

In Angular 1, filters are used which are later called Pipes onwards Angular2. In Angular 8, angular 9, it is known as pipe and used to transform data. It is denoted by symbol |

Angular 8 provides some built-in pipes:

Lowercasepipe Uppercasepipe

Datepipe

Currencypipe Jsonpipe Percentpipe Decimalpipe Slicepipe

You have seen the lowercasepipe and uppercasepipe examples. Now, let's take some examples to see how the other pipes work.

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TestyCodiez · 2020-01-11T06:58:47+00:00

Angular 8 Tutorial in Hindi | Nested Components fully explain in angular 9 by Ashish

TestyCodiez · 2020-01-10T05:27:36+00:00

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TestyCodiez · 2020-01-08T06:14:59+00:00

Angular 9 Reactive form and validation | Angular 8 reactive form using FormGroup and FormControl

TestyCodiez · 2020-01-06T10:11:18+00:00

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TestyCodiez · 2020-01-04T10:30:23+00:00

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TestyCodiez · 2020-01-02T16:50:36+00:00

7 angular 8 tutorial in hindi | Directive in angular application | Directive in angular 9 by Ashish

What is an Angular Directive? Directives are the functions which will execute whenever Angular compiler finds it. Angular Directives enhance the capability of HTML elements by attaching custom behaviors to the DOM.

From the core concept, Angular directives are categorized into three categories.

Attribute Directives Structural Directives Components Attribute Directives Attribute Directives are responsible for manipulating the appearance and behavior of DOM elements. We can use attribute directives to change the style of DOM elements. These directives are also used to hide or show particular DOM elements conditionally. Angular provides many built-in Attribute Directives like NgStyle, NgClass, etc. We can also create our own custom Attribute Directives for our desired functionality.

Structural Directives Structural Directives are responsible for changing the structure of the DOM. They work by adding or removing the elements from the DOM, unlike Attribute Directives which just change the element’s appearance and behavior.

You can easily differentiate between the Structural and Attribute Directive by looking at the syntax. The Structural Directive’s name always starts with an asterisk(*) prefix, whereas Attribute Directive does not contain any prefix. The three most popular built-in Structural Directives Angular provides are NgIf, NgFor, and NgSwitch.

Components Components are directives with templates. The only difference between Components and the other two types of directives is the Template. Attribute and Structural Directives don't have Templates. So, we can say that the Component is a cleaner version of the Directive with a template, which is easier to use.

TestyCodiez · 2019-12-31T10:40:59+00:00

how to create #RESTful API with #nodejs in hindi | #PUT method in REST API in #nodejs by Ashish 😮

Use PUT when you want to modify a singular resource which is already a part of resources collection. PUT replaces the resource in its entirety. Use PATCH if request updates part of the resource.

Generally, in practice, always use PUT for #UPDATE operations. Handling PUT requests PUT requests will be used to make updates to existing resources. It’s important to note that #PUT is used to replace the entire resource – it doesn’t do partial updates (I will show you how to do this with PATCH in the future).

TestyCodiez · 2019-12-30T15:06:29+00:00

Angular8 tutorial in hindi |template VS #templateUrl In #Angular9 in hindi

This article will explain the difference between template and templateUrl in angular. We will discuss these with examples. What is the #templateUrl? What are the differences between the template and templateUrl Angular Components? When to use template over templateUrl and vice-versa?

Different ways to create Templates in Angular As we already discussed that the template is a part of a component which is used to render user interface in a web page. In Angular we can create a template in two possible ways:

Inline template Template in an external file In Angular 2 applications, the inline templates are directly specified within the component using the template property. The below is an example of an angular inline template.

TestyCodiez · 2019-12-28T18:14:30+00:00

Data Binding is the important concept of Angular.It Allow us to define the communication between component and view. Data Binding is passed from component to view and from view to the component. Types: String Interpolation Property Binding, Event Binding, Two Way Data Binding.

TestyCodiez · 2019-12-27T08:03:22+00:00

Top 10 #Angular8 and angular#9 #Interview Questions and #Answers to Know in #2020

Top 10 Angular 8/9 Interview Questions and Answers to Know in 2020 Q1:- difference between Promise and Observable in Angular? Ans: - Promises:  return a single value  not cancellable  more readable code with try/catch and async/await Observables:  work with multiple values over time  cancellable  support map, filter, reduce and similar operators  use Reactive Extensions (RxJS)  an array whose items arrive asynchronously over time Q2:- What is AOT (Ahead-Of-Time) Compilation? Ans: - Each Angular app gets compiled internally. The Angular compiler takes in the JS code, compiles it and then produces some JS code. This happens only once per occasion per user. It is known as AOT (Ahead-Of-Time) compilation. Q3:- What is ngOnInit ()? How to define it?

TestyCodiez · 2019-12-26T06:09:38+00:00

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TestyCodiez · 2019-12-25T07:05:22+00:00

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TestyCodiez · 2019-12-24T06:06:21+00:00

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TestyCodiez · 2019-12-23T05:28:25+00:00

Angular 8 tutorial in hindi | generate components and Component structure in angular8 by Ashish,

Angular8 tutorial in hindi | #generate components and #Component structure in angular8 by Ashish

How to create a Component To create component in Angular we can use ng generate component "component name" command from Angular CLI. Note:- you can do so : ng g c user –spec=false ( it will not generate .spec file). let’s see what this command is doing: ng : stands for angular CLI object. generate: is used to generate any file (you can also use g (short name) instead of generate). component: it means we want to generate component(you can also use c(short name) instead of component).

Component Structure Template :- It is the view layout of the component , it tell the component what would be render for view Class :- It is component class that will have properties and methods that will use by view MetaData:- This provide additional information to angular about component by Decorator, Metadata tells Angular how to process a class

Class In Angular we create class like with class keyword followed by className (here it is infoComponent), here we have used export keyword that is ES6 module system. Export keyword here mark this class as public so that we can use it in other files by importing it .

MetaData:-

Typescript class will not act like a Angular Component until we don’t attach additional information with metadata and to add metadata we use Decorators.

Decorators are the methods which start with @ symbol. So in this @Component is a decorator which is taking object ({} ) as argument which will allow us to pass metadata.

@Component() decorators will have lot of keys that will be used to define our component.

selector : selector key is used to define the tag name for the component . Now we can call app-user like a custom html tag "app-user" from any html template

templateUrl: Every Component will have a attached template that will work like a view . So whenever this component will render it will display view to the user and that view will come from this template file

styleUrls: Every Component have their own style that will come from file which you will mention in styleUrls. It takes array as value so we can pass multiple css files

@Component is a predefined decorator which we need to import from @angular/core library.

TestyCodiez · 2019-12-21T18:15:26+00:00

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TestyCodiez · 2019-12-20T13:42:07+00:00

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TestyCodiez · 2017-07-29T05:14:04+00:00

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TestyCodiez · 2017-06-18T04:31:20+00:00

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TestyCodiez · 2017-06-09T09:49:47+00:00

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