Table of Contents
- 1 Can you have ngFor and ngIf together?
- 2 Can we use two structural directive in a single HTML element?
- 3 What is the difference between ngIf and ngFor?
- 4 How do I use ngFor and ngIf together in angular 8?
- 5 What is ngIf and ngFor in Angular?
- 6 Why * is used in ngIf?
- 7 What is ngif, else and then in angular?
- 8 What is ngfor in Angular 2?
Can you have 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.
Can we use two structural directive in a single HTML element?
Comparing Component and Structural Directives A component directive can be created multiple times, that is, every component in Angular will have a @Component decorator attached, while we cannot apply more than one structural directive to the same HTML element.
How does ngIf work in angular2?
NgIflink. A structural directive that conditionally includes a template based on the value of an expression coerced to Boolean. When the expression evaluates to true, Angular renders the template provided in a then clause, and when false or null, Angular renders the template provided in an optional else clause.
How can I use two ngFor in same tag?
Now, we will use *ngFor to display these names in the interface. In this example, we are creating an item using the let keyword of the friendlist array. It will iterate over each item in the array, and will print out the item name and item age, or any other object key we have in the array object.
What is the difference between ngIf and ngFor?
Basic Difference between ng-if, ng-show and ng-hide The ng-if directive removes or recreates a portion of the DOM tree based on an expression, Instead of hiding it. The ng-hide directive shows or hides the given HTML element based on the expression provided to the ng-hide attribute .
How do I use ngFor and ngIf together in angular 8?
Use ngFor and ngIf on same element i.e., if ngIf is true. So in this case to use *ngIf and *ngFor on same element, place the *ngIf on a parent element that wraps the *ngFor element. In the above code we are telling angular that execute *ngIf first, If the condition is true then repeat the HTML using *ngFor .
How can I use two ngFor in one div?
You can’t use multiple *ngFor s in the same element as those are structural directives and angular handles them in a specific way (basically for each structural directive it creates an ng-template element which then holds the directive itself, you can read more about it here: https://angular.io/guide/structural- …
How do I use ngIf and NgSwitch together?
Understand ngIf And ngSwitch Directives In Angular 2
- Introduction. Angular 2 provides many built-in directives.
- ngIf. ngIf directive recreates or removes the portions of the DOM which are based on the condition.
What is ngIf and ngFor in Angular?
Built-in Structural Directives Angular has the following structural directives: NgIf — conditionally creates or destroys subview from the template. NgFor — repeat a node for each item in a list. NgSwitch — a set of directives that switch between alternatives.
Why * is used in ngIf?
The asterisk, * , syntax on a structural directive, such as *ngIf , is shorthand that Angular interprets into a longer form. Angular transforms the asterisk in front of a structural directive into an that surrounds the host element and its descendants.
Can we use multiple directives in Angular?
Multiple structure directives are not allowed on the same tag. If you want to use multiple bindings of structure directive then you can follow these solutions… As per your requirement, you need iconUrl attribute binding which is based on condition.
How to use ngfor?
Install Angular. If you do not have the latest Angular CLI,then you need to update your CLI.
What is ngif, else and then in angular?
Summary *ngIf is a directive and can be applied on any HTML or angular component. *ngIf evaluates the given condition & then renders the “then template” or “else template”.; The default templates of *ngIf are “then template” which is inline template of ngIf and “else template” is blank. We can write *ngIf else blocks by using element.
What is ngfor in Angular 2?
This page will walk through angular 2 NgFor example. NgFor is a directive that iterates over collection of data . It is used to customize data display. Whenever there is change in collection of data at runtime, that will be updated in data display iterated by NgFor directive.