Angular : How to get value in html passing to other component?
I'm trying to send value which I'm getting from web service to another component but the problem is that I'm getting empty value in that another component while I can see that the value is present when I do console.log() in the current component.
AppComponent
ts
level: string = '';
getCustomer(id: string) {
this.isLoading = true;
this.customerService.getOne(id)
.subscribe(
(data) => {
this.level = data.level;
console.log(this.level); // Here I can see the value
},
(error) => {
this.errorMessage = error;
},
);
}
html
<div class="col-lg-8">
<app-other-component [active]="level"></app-other-component>
</div>
AppOtherComponent
ts
@Input() active: string;
ngOnInit() {
console.log(this.active); // Here I'm getting an empty string
}
I think that this line is executing <app-other-component [active]="level"></app-other-component>before the value of 'level' is even filled.
How can I resolve this? thanks.
javascript angular typescript
edited Nov 23 '18 at 9:46
Antu
768720
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
add a comment |
I'm trying to send value which I'm getting from web service to another component but the problem is that I'm getting empty value in that another component while I can see that the value is present when I do console.log() in the current component.
AppComponent
ts
level: string = '';
getCustomer(id: string) {
this.isLoading = true;
this.customerService.getOne(id)
.subscribe(
(data) => {
this.level = data.level;
console.log(this.level); // Here I can see the value
},
(error) => {
this.errorMessage = error;
},
);
}
html
<div class="col-lg-8">
<app-other-component [active]="level"></app-other-component>
</div>
AppOtherComponent
ts
@Input() active: string;
ngOnInit() {
console.log(this.active); // Here I'm getting an empty string
}
I think that this line is executing <app-other-component [active]="level"></app-other-component>before the value of 'level' is even filled.
How can I resolve this? thanks.
javascript angular typescript
edited Nov 23 '18 at 9:46
Antu
768720
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
Probably because the call to get the data is async and it its not yet present at the time thengOnInit()is called
– Teun van der Wijst
Nov 23 '18 at 9:35
2
You will have to implementOnChangesto get the updated value
– Yousef khan
Nov 23 '18 at 9:37
add a comment |
I'm trying to send value which I'm getting from web service to another component but the problem is that I'm getting empty value in that another component while I can see that the value is present when I do console.log() in the current component.
AppComponent
ts
level: string = '';
getCustomer(id: string) {
this.isLoading = true;
this.customerService.getOne(id)
.subscribe(
(data) => {
this.level = data.level;
console.log(this.level); // Here I can see the value
},
(error) => {
this.errorMessage = error;
},
);
}
html
<div class="col-lg-8">
<app-other-component [active]="level"></app-other-component>
</div>
AppOtherComponent
ts
@Input() active: string;
ngOnInit() {
console.log(this.active); // Here I'm getting an empty string
}
I think that this line is executing <app-other-component [active]="level"></app-other-component>before the value of 'level' is even filled.
How can I resolve this? thanks.
javascript angular typescript
edited Nov 23 '18 at 9:46
Antu
768720
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
I'm trying to send value which I'm getting from web service to another component but the problem is that I'm getting empty value in that another component while I can see that the value is present when I do console.log() in the current component.
AppComponent
ts
level: string = '';
getCustomer(id: string) {
this.isLoading = true;
this.customerService.getOne(id)
.subscribe(
(data) => {
this.level = data.level;
console.log(this.level); // Here I can see the value
},
(error) => {
this.errorMessage = error;
},
);
}
html
<div class="col-lg-8">
<app-other-component [active]="level"></app-other-component>
</div>
AppOtherComponent
ts
@Input() active: string;
ngOnInit() {
console.log(this.active); // Here I'm getting an empty string
}
I think that this line is executing <app-other-component [active]="level"></app-other-component>before the value of 'level' is even filled.
How can I resolve this? thanks.
javascript angular typescript
javascript angular typescript
edited Nov 23 '18 at 9:46
Antu
768720
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
edited Nov 23 '18 at 9:46
Antu
768720
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
edited Nov 23 '18 at 9:46
Antu
768720
edited Nov 23 '18 at 9:46
Antu
768720
edited Nov 23 '18 at 9:46
Antu
768720
768720
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
asked Nov 23 '18 at 9:31
JunaidJunaid
164212
164212
Probably because the call to get the data is async and it its not yet present at the time thengOnInit()is called
– Teun van der Wijst
Nov 23 '18 at 9:35
2
You will have to implementOnChangesto get the updated value
– Yousef khan
Nov 23 '18 at 9:37
add a comment |
Probably because the call to get the data is async and it its not yet present at the time thengOnInit()is called
– Teun van der Wijst
Nov 23 '18 at 9:35
2
You will have to implementOnChangesto get the updated value
– Yousef khan
Nov 23 '18 at 9:37
Probably because the call to get the data is async and it its not yet present at the time the
ngOnInit() is called– Teun van der Wijst
Nov 23 '18 at 9:35
Probably because the call to get the data is async and it its not yet present at the time the
ngOnInit() is called– Teun van der Wijst
Nov 23 '18 at 9:35
2
2
You will have to implement
OnChanges to get the updated value– Yousef khan
Nov 23 '18 at 9:37
You will have to implement
OnChanges to get the updated value– Yousef khan
Nov 23 '18 at 9:37
add a comment |
2 Answers
2
active
oldest
votes
Try wrapping the div in an *ngIf, if you don't want the app-other-component to be visible before the value is set from the web service:
<div class="col-lg-8" *ngIf="level">
<app-other-component [active]="level"></app-other-component>
</div>
And yeah as Yousef suggested, you will get the updated @Input value in ngOnChanges and NOT IN ngOnInit. ngOnChanges is the function that gets called on a component every time one of its @Input property changes. So you'll get the updated @Input property in there:
@Input() active: string;
ngOnChanges() {
console.log(this.active); // Here You'll get the updated `active` string.
}
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
But if he need the component rendered when thelevelis not setted your answer is not quite good.
– Jacopo Sciampi
Nov 23 '18 at 9:38
1
@JacopoSciampi, I think that's something that he'll have to explicitly specify in the OP. We can't just assume that right? :)
– SiddAjmera
Nov 23 '18 at 9:40
@SiddAjmera Thanks! it worked perfectly in my situation
– Junaid
Nov 23 '18 at 10:05
add a comment |
I guess that is because of 'this' pointer in callback function (which does not point to the component). Change it to 'self' like that
let self = this;
this.customerService.getOne
...
(data) => { self.level = data.level; }
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
Try wrapping the div in an *ngIf, if you don't want the app-other-component to be visible before the value is set from the web service:
<div class="col-lg-8" *ngIf="level">
<app-other-component [active]="level"></app-other-component>
</div>
And yeah as Yousef suggested, you will get the updated @Input value in ngOnChanges and NOT IN ngOnInit. ngOnChanges is the function that gets called on a component every time one of its @Input property changes. So you'll get the updated @Input property in there:
@Input() active: string;
ngOnChanges() {
console.log(this.active); // Here You'll get the updated `active` string.
}
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
But if he need the component rendered when thelevelis not setted your answer is not quite good.
– Jacopo Sciampi
Nov 23 '18 at 9:38
1
@JacopoSciampi, I think that's something that he'll have to explicitly specify in the OP. We can't just assume that right? :)
– SiddAjmera
Nov 23 '18 at 9:40
@SiddAjmera Thanks! it worked perfectly in my situation
– Junaid
Nov 23 '18 at 10:05
add a comment |
Try wrapping the div in an *ngIf, if you don't want the app-other-component to be visible before the value is set from the web service:
<div class="col-lg-8" *ngIf="level">
<app-other-component [active]="level"></app-other-component>
</div>
And yeah as Yousef suggested, you will get the updated @Input value in ngOnChanges and NOT IN ngOnInit. ngOnChanges is the function that gets called on a component every time one of its @Input property changes. So you'll get the updated @Input property in there:
@Input() active: string;
ngOnChanges() {
console.log(this.active); // Here You'll get the updated `active` string.
}
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
But if he need the component rendered when thelevelis not setted your answer is not quite good.
– Jacopo Sciampi
Nov 23 '18 at 9:38
1
@JacopoSciampi, I think that's something that he'll have to explicitly specify in the OP. We can't just assume that right? :)
– SiddAjmera
Nov 23 '18 at 9:40
@SiddAjmera Thanks! it worked perfectly in my situation
– Junaid
Nov 23 '18 at 10:05
add a comment |
Try wrapping the div in an *ngIf, if you don't want the app-other-component to be visible before the value is set from the web service:
<div class="col-lg-8" *ngIf="level">
<app-other-component [active]="level"></app-other-component>
</div>
And yeah as Yousef suggested, you will get the updated @Input value in ngOnChanges and NOT IN ngOnInit. ngOnChanges is the function that gets called on a component every time one of its @Input property changes. So you'll get the updated @Input property in there:
@Input() active: string;
ngOnChanges() {
console.log(this.active); // Here You'll get the updated `active` string.
}
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
Try wrapping the div in an *ngIf, if you don't want the app-other-component to be visible before the value is set from the web service:
<div class="col-lg-8" *ngIf="level">
<app-other-component [active]="level"></app-other-component>
</div>
And yeah as Yousef suggested, you will get the updated @Input value in ngOnChanges and NOT IN ngOnInit. ngOnChanges is the function that gets called on a component every time one of its @Input property changes. So you'll get the updated @Input property in there:
@Input() active: string;
ngOnChanges() {
console.log(this.active); // Here You'll get the updated `active` string.
}
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
edited Nov 23 '18 at 9:45
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
answered Nov 23 '18 at 9:35
SiddAjmeraSiddAjmera
15.3k31137
15.3k31137
But if he need the component rendered when thelevelis not setted your answer is not quite good.
– Jacopo Sciampi
Nov 23 '18 at 9:38
1
@JacopoSciampi, I think that's something that he'll have to explicitly specify in the OP. We can't just assume that right? :)
– SiddAjmera
Nov 23 '18 at 9:40
@SiddAjmera Thanks! it worked perfectly in my situation
– Junaid
Nov 23 '18 at 10:05
add a comment |
But if he need the component rendered when thelevelis not setted your answer is not quite good.
– Jacopo Sciampi
Nov 23 '18 at 9:38
1
@JacopoSciampi, I think that's something that he'll have to explicitly specify in the OP. We can't just assume that right? :)
– SiddAjmera
Nov 23 '18 at 9:40
@SiddAjmera Thanks! it worked perfectly in my situation
– Junaid
Nov 23 '18 at 10:05
But if he need the component rendered when the
level is not setted your answer is not quite good.– Jacopo Sciampi
Nov 23 '18 at 9:38
But if he need the component rendered when the
level is not setted your answer is not quite good.– Jacopo Sciampi
Nov 23 '18 at 9:38
1
1
@JacopoSciampi, I think that's something that he'll have to explicitly specify in the OP. We can't just assume that right? :)
– SiddAjmera
Nov 23 '18 at 9:40
@JacopoSciampi, I think that's something that he'll have to explicitly specify in the OP. We can't just assume that right? :)
– SiddAjmera
Nov 23 '18 at 9:40
@SiddAjmera Thanks! it worked perfectly in my situation
– Junaid
Nov 23 '18 at 10:05
@SiddAjmera Thanks! it worked perfectly in my situation
– Junaid
Nov 23 '18 at 10:05
add a comment |
I guess that is because of 'this' pointer in callback function (which does not point to the component). Change it to 'self' like that
let self = this;
this.customerService.getOne
...
(data) => { self.level = data.level; }
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
add a comment |
I guess that is because of 'this' pointer in callback function (which does not point to the component). Change it to 'self' like that
let self = this;
this.customerService.getOne
...
(data) => { self.level = data.level; }
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
add a comment |
I guess that is because of 'this' pointer in callback function (which does not point to the component). Change it to 'self' like that
let self = this;
this.customerService.getOne
...
(data) => { self.level = data.level; }
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
I guess that is because of 'this' pointer in callback function (which does not point to the component). Change it to 'self' like that
let self = this;
this.customerService.getOne
...
(data) => { self.level = data.level; }
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
answered Nov 23 '18 at 9:39
AndreyAndrey
1144
1144
add a comment |
add a comment |
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Probably because the call to get the data is async and it its not yet present at the time the
ngOnInit()is called– Teun van der Wijst
Nov 23 '18 at 9:35
2
You will have to implement
OnChangesto get the updated value– Yousef khan
Nov 23 '18 at 9:37