Add Data Dynamically to HTML Button in HTML page - html

Question

I have this button, I need to add Pendo Data that is dynamically working based on which button we chose. Mostly this is making the Button unique. When I have a button that is not changing I add like this:
<button mat-button
 data-pendo="pendo-prospects-send-application"
class='round-button'
color='primary'
type='button'
.....>
</button>
But sometime I need to add this data to one button that is changing based on CSS class. I am not sure how check for that.
For example I need to add to a button when :
if [class.fa-pencil] then data-pendo "Something"
if [class.fa-plus] then data-pendo "Something else"
This is the button that changes base on class:
<button mat-button
class='round-button'
type='button'
[class.disabled-button]='GuidId'
color='primary'
(click)='onAssignLoanOfficer()'>
<i class='fal'
[class.fa-pencil]='GuidId'
[class.fa-plus]='!GuidId'></i>
</button>
How I can do that?

Answer 1

Based on your comments I think this is what you want to do:
<button
(click)="onAssignLoanOfficer()"
[class.disabled-button]="GuidId"
[attr.data-pendo]="GuidId ? 'pendo-edit-loan' : 'pendo-add-loan'"
class="round-button"
color="primary"
type="button">
<i [class.fa-pencil]="GuidId"
[class.fa-plus]="!GuidId"
class="fall">
</i>
</button>
ALTERNATIVE:
As a more sophisticated alternative (I really don't know how you intend to use what you're asking for), you can build a directive to add the attribute you want based on a map of class-to-pendo-data conversion information:
#Directive({
selector: '[addPendoData]'
})
export class AddPendoDataDirective implements AfterViewInit {
constructor(private _el: ElementRef, private _renderer: Renderer2) {}
ngAfterViewInit() {
const pendoData: string | null | undefined = this._getPendoValue();
if (!pendoData) { return;}
const $button: HTMLElement = this._el.nativeElement;
this._renderer.setAttribute($button, 'data-pendo', pendoData);
}
private _getPendoValue() {
const $child: HTMLElement = this._el.nativeElement;
if(!$child) { return null; }
const $i: HTMLElement = $child.querySelector('i');
if(!$i) { return null; }
const listOfClasses: string[] = $i.className.split(' ');
if (!(listOfClasses && listOfClasses.length)) { return null; }
for(const className of listOfClasses) {
if(PENDO_MAP[className]) { return PENDO_MAP[className]; }
}
return null;
}
}
const PENDO_MAP: { [className: string]: string } = {
'fa-pencil': 'pendo-edit-loan',
'fa-plus': 'pendo-add-loan'
// add other mappings here...
};
and you can use it like this:
<button
(click)="onAssignLoanOfficer()"
[class.disabled-button]="GuidId"
addPendoData
class="round-button"
color="primary"
type="button">
<i [class.fa-pencil]="GuidId"
[class.fa-plus]="!GuidId"
class="fall">
</i>
</button>
I've put together this stackblitz demo.

Answer 2

You could define a directive, as julianobrasil suggests.
I want to point a different way to achieve this using Angular templates.
Define two buttons, addition and edition, separately.
Put a default where you want to be rendered
<div class="action-button" *ngIf="GuidId">
<!-- Add button -->
<button mat-button
data-pendo="pendo-add-loan"
(click)="add(...)"
class="round-button"
color="primary">
<i class="fal fa-plus"></i>
</button>
</div>
Then, define a ng-template tag with the other button definition. A completely fresh new.
<ng-template #edit-button>
<div class="action-button">
<!-- Edit button -->
<button mat-button
(click)="edit(...)"
data-pendo="pendo-edit-loan"
class="round-button"
color="primary">
<i class="fal fa-pencil"></i>
</button>
</div>
</ng-template>
Finally, just change the *ngIf statement to render either an addition button or an edition one.
<div class="action-button" *ngIf="!GuidId else edit-button">
<!-- Add button here -->
</div>
This is a way that scales in order to keep components isolated. The buttons are not related anymore, so you can implement w/o having to condition every style, action, etc.
Hope it helps.