How do I prevent interactions from being printed if the value is a number?
How do I prevent interactions from being printed if the value is a number?
Go through the selected items one by one. This means avoiding the use of book.links in ngFor and instead using a custom array that excludes any empty items.
For example:
<button *ngFor="let singleBook of validLinks" type="button">
...
</button>
Also utilize a getter in the component like this
get validLinks () {
return this.book.links.filter(b => !!b.trim())
}
How to clean up values
sanitize(value){
return value.split('/').pop().replace(/-/g, " ");
}
get cleanedBookLinks() {
return this.book.links
.map(item=> ({...item, link:this.sanitize(item.href)}))
.filter(item=> !this.isNumeric(item.href));
}
Displaying in the HTML template
<button type="button"
*ngFor="let singleBook of cleanedBookLinks">
<span (click)="displayInfo(book, $event, i)" >
{{ singleBook.link }}
</span>
</button>
To avoid using multiple structural/conditional directives on the same element (ngif + ngfor), a solution is to wrap them in an ng-container.
<ng-container *ngFor="let singleBook of book.links">
<button type="button" *ngIf="selectedAction(singleBook.href)">
<span (click)="showI(book, $event, i)">
{{ selectedAction(singleBook.href) }}
</span>
</button>
</ng-container>
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