One of the biggest changes from AngularJS to Angular (2+) is the step away from two-way data binding. The problem with two-way data binding is the ...
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Hi ! (having this problem)
export class imageUploadComponent {
@Input() imagen:string;
console.log(this.imagen) = undefined
how can I pass an image as a parameter ?
Hi Daniel without seeing all of your code I'm not exactly sure what you're trying to do. But I'm assuming you are trying to pass the path to the image as a string? Be sure to pass an absolute path rather than relative.
If it's undefined perhaps the variable is not yet defined or the input is not yet provided at the time when the console log is called.
Hi Stephe !
In my form i Hava this:
I use the just to see that the info is there.
then I call <upload-image...., with the parameter that you see.
But when I get into :
@Component({
selector: 'upload-imagen',
templateUrl: './imagen.component.html',
styleUrls: ['./imagen.component.scss'],
})
export class imageUploadComponent {
@Input() imagen: any;
....
and do a console.log(this.imagen) can see :undefined
So I guess Im not passing the parameter ok or Im not using (@Input() imagen: any;) the correct way.
Hope you undertand me and thx for your time
Hi Stephe !
In my form i Hava this:
(use this img temp so just to check my image is there)
I use the just to see that the info is there.
then I call <upload-image...., with the parameter that you see.
But when I get into :
@Component({
selector: 'upload-imagen',
templateUrl: './imagen.component.html',
styleUrls: ['./imagen.component.scss'],
})
export class imageUploadComponent {
@Input() imagen: any;
....
and do a console.log(this.imagen) can see :undefined
So I guess Im not passing the parameter ok or Im not using (@Input() imagen: any;) the correct way.
Hope you undertand me and thx for your time
Hi I can't really debug for you from here... But have you imported
input?@Component({
selector: 'upload-imagen', ....
and ...
export class imageUploadComponent {
@Input() imagen: any;
Could it be that passing parameter has a size limit ?
Thx
yes
Hi
No the path, the image I have in a json file
So if you've imported input like this:
What does your HTML markup look like?
Since I cant find the solution, Im trying to assign the Image to a global variable and then assign it to a local var
Yes
@import() miImage: any;
Im trying something differet like this
@Injectable()
export class Globals {
public imagenUno: any;
}
then:
this.globals.imagenUno=data.Imagen;
console.log('Foto:'+this.globals.imagenUno) (I see the image in conole.log)
then I have image.componet.ts
import { Globals } from 'src/app/globals';
constructor(private globals: Globals ) {
console.log('Foto:'+this.globals.imagenUno) (get Foto:undefined)
}
Well I guess Im missing something with angular 7
I created a dev.to account just to say thank you. Clear and concise to the point - just what I needed!
Thanks for this great article, but do you have a link to next one of the series? Sharing data between components using a service? Much appreciated, thanks.
Hi Beto, sadly I never got to it...but essentially if the service is provided in root then it is a singleton, meaning you have just one instance of it during it's lifetime.
That means any value you hold in it essentially is available to any component no matter how nested by injecting the service so then you won't find yourself having to continuously pass down the value through a whole tree of components.
I don't recommend exposing or accessing that variable in the service directly. Instead, write a method that accesses it.
Here's the documentation on this: Singleton Services.