5
Because in Angular we use interrogation, for example:
*ngIf="listaxpto?.clientes.length"
1 answer
14
The ? is a operator Angular protecting property against null and undefined values.
In your case, without the use of the operator and the object listaxpto being null would be released an exception
Typeerror: Cannot read Property 'clients' of null.
but in some cases it is necessary to start the property with value null
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