angular Archives - Page 14 of 14

ngFor with index as value in attribute

I have a simple ngFor loop which also keeps track of the current index. I want to store that index value in an ...

April 22, 2022
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Could not find module “@angular-devkit/build-angular”

After updating to Angular 6.0.1, I get the following error on ng serve: Could not find module "@angular-devkit/build-angular" from "/home/Projects/myProjectName". Error: Could not ...

April 20, 2022
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How can I use “*ngIf else”?

I’m using Angular and I want to use *ngIf else (available since version 4) in this example: <div *ngIf="isValid"> content here ... </div> ...

April 20, 2022
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Angular/RxJS When should I unsubscribe from `Subscription`

When should I store the Subscription instances and invoke unsubscribe() during the ngOnDestroy life cycle and when can I simply ignore them? Saving ...

April 17, 2022
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Angular HTML binding

I am writing an Angular application and I have an HTML response I want to display. How do I do that? If I ...

April 15, 2022
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Can’t bind to ‘formGroup’ since it isn’t a known property of ‘form’

The situation I am trying to make what should be a very simple form in my Angular application, but no matter what, it ...

April 14, 2022
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Difference between Constructor and ngOnInit

Angular provides life cycle hook ngOnInit by default. Why should ngOnInit be used, if we already have a constructor? 2 27 The Constructor ...

April 13, 2022
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What is the difference between Promises and Observables?

What is the difference between Promise and Observable in Angular? An example on each would be helpful in understanding both the cases. In ...

April 11, 2022
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Property ‘map’ Does Not Exist on Type ‘observable‘

You need to import the map operator: Or more generally: Notice: For versions of RxJS 6.x.x and above, you will have to use pipeable operators ...

March 30, 2022
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