I am trying to check if a document name it is coming with the first char as a number. I am not able to make my code go in and display "Dummy string". I tried with this two options but it is not working.
1.
let documentPDF = "6487954.pdf"
<ng-container *ngIf="Character.isDigit(ParseInt(documentPDF.charAt(0))) == false">
Dummy string
</ng-container>
2.
let document = "6487954.pdf"
<ng-container *ngIf="isNaN(ParseInt(documentPDF.charAt(0))) == false">
Dummy string
</ng-container>
Thank you for your help.
you can use a regular expression:
try this:
let documentPDF = "6487954.pdf"
<ng-container *ngIf="!/^\d/.test(documentPDF)">
Dummy string
</ng-container>
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