Difference between ElemenetRef and TemplateRef in angular4
3
i have seen many examples of ElemenetRef and TemplateRef which got me more confused.
- what is the difference between ElementRef and TemplateRef why we should use one over another
HTML
<ng-template #element>
<div style="border:solid 3px yellow;width:250px;
height:250px;position:relative;top:0px;">
this is my element
</div>
</ng-template>
<ng-container #template>
</ng-container>
.ts file
@ViewChild('element', { read: TemplateRef }) element: TemplateRef<any>;
@ViewChild('template', { read: ViewContainerRef }) template: ViewContainerRef;
ngAfterViewInit() {
this.template.createEmbeddedView(this.element);
}
now if i change the above code to use ElementRef then also it works fine
@ViewChild('element', { read: ElementRef }) element: ElementRef;
so my question is why should i use TemplateRef if i can acheive the same with the use of ElementRef
angular elementref
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
|
show 3 more comments
3
i have seen many examples of ElemenetRef and TemplateRef which got me more confused.
- what is the difference between ElementRef and TemplateRef why we should use one over another
HTML
<ng-template #element>
<div style="border:solid 3px yellow;width:250px;
height:250px;position:relative;top:0px;">
this is my element
</div>
</ng-template>
<ng-container #template>
</ng-container>
.ts file
@ViewChild('element', { read: TemplateRef }) element: TemplateRef<any>;
@ViewChild('template', { read: ViewContainerRef }) template: ViewContainerRef;
ngAfterViewInit() {
this.template.createEmbeddedView(this.element);
}
now if i change the above code to use ElementRef then also it works fine
@ViewChild('element', { read: ElementRef }) element: ElementRef;
so my question is why should i use TemplateRef if i can acheive the same with the use of ElementRef
angular elementref
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
2
ElementRefrefers to an element of the DOM, whereasTemplateRefrepresents an embedded template (usually a component template). So to summarize, the template ref can contain several element refs, but the element ref can not contain a template ref.
– trichetriche
Nov 19 '18 at 12:28
so if we have a simple dom like this<span><span>then we have to use elementRef and if we have a template like this <div><div><div>something here</div></div></div> then we have to use templateRef, right? if yes, then what can a templateRef do which a elementRef cannot, can u please give me a brief idea, i am not able to find anythign online regarding this
– Lijin Durairaj
Nov 19 '18 at 12:37
1
in HTML it gives<app-my-component #templateRef><div #elementRef>Some content</div></app-my-component>. The template reference is to be used only with view container references, most of the time in structural directives (directives like*ngForor*ngIfthat manipulate the DOM directly). The documentation about ElementRef, TemplateRef and structural directives mght help you.
– trichetriche
Nov 19 '18 at 12:42
now viewContainerRef also has a createEmbeddedView() method same as the templateRef. then why should i use templateRef when i can use viewContainerRef and get the element using elementRef
– Lijin Durairaj
Nov 19 '18 at 12:49
You're getting away from your original question here. Don't make it an XY problem : tell me what you are trying to achieve, I'll tell you how to do it.
– trichetriche
Nov 19 '18 at 12:50
|
show 3 more comments
3
3
3
1
i have seen many examples of ElemenetRef and TemplateRef which got me more confused.
- what is the difference between ElementRef and TemplateRef why we should use one over another
HTML
<ng-template #element>
<div style="border:solid 3px yellow;width:250px;
height:250px;position:relative;top:0px;">
this is my element
</div>
</ng-template>
<ng-container #template>
</ng-container>
.ts file
@ViewChild('element', { read: TemplateRef }) element: TemplateRef<any>;
@ViewChild('template', { read: ViewContainerRef }) template: ViewContainerRef;
ngAfterViewInit() {
this.template.createEmbeddedView(this.element);
}
now if i change the above code to use ElementRef then also it works fine
@ViewChild('element', { read: ElementRef }) element: ElementRef;
so my question is why should i use TemplateRef if i can acheive the same with the use of ElementRef
angular elementref
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
i have seen many examples of ElemenetRef and TemplateRef which got me more confused.
- what is the difference between ElementRef and TemplateRef why we should use one over another
HTML
<ng-template #element>
<div style="border:solid 3px yellow;width:250px;
height:250px;position:relative;top:0px;">
this is my element
</div>
</ng-template>
<ng-container #template>
</ng-container>
.ts file
@ViewChild('element', { read: TemplateRef }) element: TemplateRef<any>;
@ViewChild('template', { read: ViewContainerRef }) template: ViewContainerRef;
ngAfterViewInit() {
this.template.createEmbeddedView(this.element);
}
now if i change the above code to use ElementRef then also it works fine
@ViewChild('element', { read: ElementRef }) element: ElementRef;
so my question is why should i use TemplateRef if i can acheive the same with the use of ElementRef
angular elementref
angular elementref
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
asked Nov 19 '18 at 12:14
Lijin DurairajLijin Durairaj
1,00411834
1,00411834
2
ElementRefrefers to an element of the DOM, whereasTemplateRefrepresents an embedded template (usually a component template). So to summarize, the template ref can contain several element refs, but the element ref can not contain a template ref.
– trichetriche
Nov 19 '18 at 12:28
so if we have a simple dom like this<span><span>then we have to use elementRef and if we have a template like this <div><div><div>something here</div></div></div> then we have to use templateRef, right? if yes, then what can a templateRef do which a elementRef cannot, can u please give me a brief idea, i am not able to find anythign online regarding this
– Lijin Durairaj
Nov 19 '18 at 12:37
1
in HTML it gives<app-my-component #templateRef><div #elementRef>Some content</div></app-my-component>. The template reference is to be used only with view container references, most of the time in structural directives (directives like*ngForor*ngIfthat manipulate the DOM directly). The documentation about ElementRef, TemplateRef and structural directives mght help you.
– trichetriche
Nov 19 '18 at 12:42
now viewContainerRef also has a createEmbeddedView() method same as the templateRef. then why should i use templateRef when i can use viewContainerRef and get the element using elementRef
– Lijin Durairaj
Nov 19 '18 at 12:49
You're getting away from your original question here. Don't make it an XY problem : tell me what you are trying to achieve, I'll tell you how to do it.
– trichetriche
Nov 19 '18 at 12:50
|
show 3 more comments
2
ElementRefrefers to an element of the DOM, whereasTemplateRefrepresents an embedded template (usually a component template). So to summarize, the template ref can contain several element refs, but the element ref can not contain a template ref.
– trichetriche
Nov 19 '18 at 12:28
so if we have a simple dom like this<span><span>then we have to use elementRef and if we have a template like this <div><div><div>something here</div></div></div> then we have to use templateRef, right? if yes, then what can a templateRef do which a elementRef cannot, can u please give me a brief idea, i am not able to find anythign online regarding this
– Lijin Durairaj
Nov 19 '18 at 12:37
1
in HTML it gives<app-my-component #templateRef><div #elementRef>Some content</div></app-my-component>. The template reference is to be used only with view container references, most of the time in structural directives (directives like*ngForor*ngIfthat manipulate the DOM directly). The documentation about ElementRef, TemplateRef and structural directives mght help you.
– trichetriche
Nov 19 '18 at 12:42
now viewContainerRef also has a createEmbeddedView() method same as the templateRef. then why should i use templateRef when i can use viewContainerRef and get the element using elementRef
– Lijin Durairaj
Nov 19 '18 at 12:49
You're getting away from your original question here. Don't make it an XY problem : tell me what you are trying to achieve, I'll tell you how to do it.
– trichetriche
Nov 19 '18 at 12:50
2
2
ElementRef refers to an element of the DOM, whereas TemplateRef represents an embedded template (usually a component template). So to summarize, the template ref can contain several element refs, but the element ref can not contain a template ref.– trichetriche
Nov 19 '18 at 12:28
ElementRef refers to an element of the DOM, whereas TemplateRef represents an embedded template (usually a component template). So to summarize, the template ref can contain several element refs, but the element ref can not contain a template ref.– trichetriche
Nov 19 '18 at 12:28
so if we have a simple dom like this<span><span>then we have to use elementRef and if we have a template like this <div><div><div>something here</div></div></div> then we have to use templateRef, right? if yes, then what can a templateRef do which a elementRef cannot, can u please give me a brief idea, i am not able to find anythign online regarding this
– Lijin Durairaj
Nov 19 '18 at 12:37
so if we have a simple dom like this<span><span>then we have to use elementRef and if we have a template like this <div><div><div>something here</div></div></div> then we have to use templateRef, right? if yes, then what can a templateRef do which a elementRef cannot, can u please give me a brief idea, i am not able to find anythign online regarding this
– Lijin Durairaj
Nov 19 '18 at 12:37
1
1
in HTML it gives
<app-my-component #templateRef><div #elementRef>Some content</div></app-my-component>. The template reference is to be used only with view container references, most of the time in structural directives (directives like *ngFor or *ngIf that manipulate the DOM directly). The documentation about ElementRef, TemplateRef and structural directives mght help you.– trichetriche
Nov 19 '18 at 12:42
in HTML it gives
<app-my-component #templateRef><div #elementRef>Some content</div></app-my-component>. The template reference is to be used only with view container references, most of the time in structural directives (directives like *ngFor or *ngIf that manipulate the DOM directly). The documentation about ElementRef, TemplateRef and structural directives mght help you.– trichetriche
Nov 19 '18 at 12:42
now viewContainerRef also has a createEmbeddedView() method same as the templateRef. then why should i use templateRef when i can use viewContainerRef and get the element using elementRef
– Lijin Durairaj
Nov 19 '18 at 12:49
now viewContainerRef also has a createEmbeddedView() method same as the templateRef. then why should i use templateRef when i can use viewContainerRef and get the element using elementRef
– Lijin Durairaj
Nov 19 '18 at 12:49
You're getting away from your original question here. Don't make it an XY problem : tell me what you are trying to achieve, I'll tell you how to do it.
– trichetriche
Nov 19 '18 at 12:50
You're getting away from your original question here. Don't make it an XY problem : tell me what you are trying to achieve, I'll tell you how to do it.
– trichetriche
Nov 19 '18 at 12:50
|
show 3 more comments
1 Answer
1
active
oldest
votes
1
ElementRef is simply a like document.getElementById('myId');
by ElementRef you can only able to do some decorations
TemplateRef is a embedded template where you can give it to angular to create Embedded View.
*ngFor doing the same, it reads the element as TemplateRef and injects mutiple times to create view with data
TemplateRef cannot be used as a element for css decorations in .ts
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
@trichetriche, can u please command on this answer and let me know if it is correct, thanks
– Lijin Durairaj
Nov 19 '18 at 13:39
thanks for the help @Sheik Althaf
– Lijin Durairaj
Nov 19 '18 at 13:39
add a comment |
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1
ElementRef is simply a like document.getElementById('myId');
by ElementRef you can only able to do some decorations
TemplateRef is a embedded template where you can give it to angular to create Embedded View.
*ngFor doing the same, it reads the element as TemplateRef and injects mutiple times to create view with data
TemplateRef cannot be used as a element for css decorations in .ts
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
@trichetriche, can u please command on this answer and let me know if it is correct, thanks
– Lijin Durairaj
Nov 19 '18 at 13:39
thanks for the help @Sheik Althaf
– Lijin Durairaj
Nov 19 '18 at 13:39
add a comment |
1
ElementRef is simply a like document.getElementById('myId');
by ElementRef you can only able to do some decorations
TemplateRef is a embedded template where you can give it to angular to create Embedded View.
*ngFor doing the same, it reads the element as TemplateRef and injects mutiple times to create view with data
TemplateRef cannot be used as a element for css decorations in .ts
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
@trichetriche, can u please command on this answer and let me know if it is correct, thanks
– Lijin Durairaj
Nov 19 '18 at 13:39
thanks for the help @Sheik Althaf
– Lijin Durairaj
Nov 19 '18 at 13:39
add a comment |
1
1
1
ElementRef is simply a like document.getElementById('myId');
by ElementRef you can only able to do some decorations
TemplateRef is a embedded template where you can give it to angular to create Embedded View.
*ngFor doing the same, it reads the element as TemplateRef and injects mutiple times to create view with data
TemplateRef cannot be used as a element for css decorations in .ts
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
ElementRef is simply a like document.getElementById('myId');
by ElementRef you can only able to do some decorations
TemplateRef is a embedded template where you can give it to angular to create Embedded View.
*ngFor doing the same, it reads the element as TemplateRef and injects mutiple times to create view with data
TemplateRef cannot be used as a element for css decorations in .ts
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
answered Nov 19 '18 at 13:16
Sheik AlthafSheik Althaf
27717
27717
@trichetriche, can u please command on this answer and let me know if it is correct, thanks
– Lijin Durairaj
Nov 19 '18 at 13:39
thanks for the help @Sheik Althaf
– Lijin Durairaj
Nov 19 '18 at 13:39
add a comment |
@trichetriche, can u please command on this answer and let me know if it is correct, thanks
– Lijin Durairaj
Nov 19 '18 at 13:39
thanks for the help @Sheik Althaf
– Lijin Durairaj
Nov 19 '18 at 13:39
@trichetriche, can u please command on this answer and let me know if it is correct, thanks
– Lijin Durairaj
Nov 19 '18 at 13:39
@trichetriche, can u please command on this answer and let me know if it is correct, thanks
– Lijin Durairaj
Nov 19 '18 at 13:39
thanks for the help @Sheik Althaf
– Lijin Durairaj
Nov 19 '18 at 13:39
thanks for the help @Sheik Althaf
– Lijin Durairaj
Nov 19 '18 at 13:39
add a comment |
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2
ElementRefrefers to an element of the DOM, whereasTemplateRefrepresents an embedded template (usually a component template). So to summarize, the template ref can contain several element refs, but the element ref can not contain a template ref.– trichetriche
Nov 19 '18 at 12:28
so if we have a simple dom like this<span><span>then we have to use elementRef and if we have a template like this <div><div><div>something here</div></div></div> then we have to use templateRef, right? if yes, then what can a templateRef do which a elementRef cannot, can u please give me a brief idea, i am not able to find anythign online regarding this
– Lijin Durairaj
Nov 19 '18 at 12:37
1
in HTML it gives
<app-my-component #templateRef><div #elementRef>Some content</div></app-my-component>. The template reference is to be used only with view container references, most of the time in structural directives (directives like*ngForor*ngIfthat manipulate the DOM directly). The documentation about ElementRef, TemplateRef and structural directives mght help you.– trichetriche
Nov 19 '18 at 12:42
now viewContainerRef also has a createEmbeddedView() method same as the templateRef. then why should i use templateRef when i can use viewContainerRef and get the element using elementRef
– Lijin Durairaj
Nov 19 '18 at 12:49
You're getting away from your original question here. Don't make it an XY problem : tell me what you are trying to achieve, I'll tell you how to do it.
– trichetriche
Nov 19 '18 at 12:50