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Hi Emanuele,Thanks for contacting Syncfusion support.We have checked your attached code snippet. We suspect that, you have tried to perform custom sorting operation for ListView component. But our Listview component, we have provided a support for sorting by using sortOrder property to perform sorting.For your reference we have prepared a sample. Refer the sample link below.To know about the sorting, refer the below link.UG Documentation: https://ej2.syncfusion.com/angular/documentation/listview/how-to/filter-list-items-in-the-listview/If you want to perform custom sort operations, can you please share additional details regarding your requirement it will helpful for us to resolve your issue at earlier.Please let us know, if you have any concerns.Regards,Sowmiya.P