What is Ngrepeat?

What is Ngrepeat?

Angular-JS ng-repeat directive is a handy tool to repeat a set of HTML code for a number of times or once per item in a collection of items. ng-repeat is mostly used on arrays and objects.

How do you use ngFor?

To Use ngFor directive, you have to create a block of HTML elements, which can display a single item of the items collection. After that you can use the ngFor directive to tell angular to repeat that block of HTML elements for each item in the list.

What can I use instead of NG-repeat?

You can consider using transclusion inside a custom directive, to achieve the behavior you are looking for without using ng-repeat.

What is difference between ngFor and Ng-repeat?

ng-repeat created inherited child scope for each element of collection, while *ngFor creates local variable in the that block.

How do you use NG disability?

Definition and Usage The ng-disabled directive sets the disabled attribute of a form field (input, select, or textarea). The form field will be disabled if the expression inside the ng-disabled attribute returns true. The ng-disabled directive is necessary to be able to shift the value between true and false .

What is ngIf and ngFor?

NgIf conditionally displays items by adding or removing them from the DOM depending on the condition. NgFor renders a list of items from iterable objects.

What is * in * ngFor?

In *ngFor the * is a shorthand for using the new angular template syntax with a template tag, this is also called structural Directive.It is helpful to know that * is just a shorthand to explicitly defining the data bindings on a template tag.

Is ng-repeat a directive?

AngularJS ng-repeat Directive The ng-repeat directive repeats a set of HTML, a given number of times. The set of HTML will be repeated once per item in a collection. The collection must be an array or an object.

What is $Index in AngularJS?

The $index variable is used to get the Index of an item repeated using ng-repeat directive in AngularJS.

Why do we use NG?

We use the NgFor directive to loop over an array of items and create multiple elements dynamically from a template element. The template element is the element the directive is attached to. We can nest muliple NgFor directives together.

Why we use $$ in AngularJS?

We use $$ to avoid the internal variable conflicts and not to expose for external use.

What is life cycle of AngularJS?

Now that you understand the components involved in an AngularJS application, you need to understand what happens during the life cycle, which has three phases: bootstrap, compilation, and runtime.

Can I use ngFor and ngIf together?

Best way to use ngFor and ngIf together is to use element to write one of the structural directive. ng-container allows us to create a separate section in a template without adding it to DOM. The ng-container does not get added to the DOM, but content inside it is rendered.

What is trackBy in ngFor?

Angular provides a method called trackBy , which is used to track our incoming data every time we get a request from an API. Suppose we have some data coming from an API request into the collection, and we need to change the data over the web page using the ngFor directive.

What is * ngIf in Angular?

A shorthand form of the directive, *ngIf=”condition” , is generally used, provided as an attribute of the anchor element for the inserted template. Angular expands this into a more explicit version, in which the anchor element is contained in an element.

How do I use track in NG-repeat?

To avoid this problem, you can use “track by” with ng-repeat. In track by you have to use angular expression that will be used to uniquely identify the each items in collection or model. “track by” tells the angular js that how angular js will track the association between DOM and the model (i.e. collection).

What is [( ngModel?

ngModel Usage With Example The ng-model directive binds the value of HTML controls (input, select, text-area) to application data. It is a part of the FormsModule. This directive is used by itself or as part of a larger form. It accepts a domain model as an optional Input.