Difference between ElemenetRef and TemplateRef in angular4

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

asked Nov 19 '18 at 12:14

Lijin Durairaj

1,00411834

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

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 *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

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

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

asked Nov 19 '18 at 12:14

Lijin Durairaj

1,00411834

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

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 *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

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

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

asked Nov 19 '18 at 12:14

Lijin 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

asked Nov 19 '18 at 12:14

Lijin Durairaj

1,00411834

asked Nov 19 '18 at 12:14

Lijin Durairaj

1,00411834

asked Nov 19 '18 at 12:14

Lijin Durairaj

1,00411834

asked Nov 19 '18 at 12:14

Lijin Durairaj

1,00411834

asked Nov 19 '18 at 12:14

Lijin Durairaj

1,00411834

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

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 *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

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

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

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

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

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

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

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

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 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 Answer
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1 Answer
1

active

oldest

votes

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 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 |

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 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 |

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 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 Althaf

27717

answered Nov 19 '18 at 13:16

Sheik Althaf

27717

answered Nov 19 '18 at 13:16

Sheik Althaf

27717

answered Nov 19 '18 at 13:16

Sheik 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 |

@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

thanks for the help @Sheik Althaf

– Lijin Durairaj
Nov 19 '18 at 13:39

add a comment |

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