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[Vue.js] DateTime formatting annotations not working with Vue app in Visual Studio

Do data annotations work with a vue.js app in Visual Studio?

there is a vue.js app with Visual Studio and I’m fetching a DateTime from a entity framework query. I’m using data annotations on the view model like below but it’s not getting formatted on the screen.

Any reason why?

part of the entity query

var recordsVM = records.Select(r => new GetRecordsReturnViewModel
StartDate = r.StartDate, // DateTime?
// other params


[DisplayFormat(DataFormatString = “{0:MM/dd/yyyy}”)]
public DateTime? StartDate { get; set; }


<td><span>{ props.item.startDate }</span></td>

what I’m seeing in each td


Solution :

You are mixing ideas from different platforms. DisplayFormatAttribute can be used by ASP.Net MVC for server-side HTML generation (Razor views, etc.), but it is not something that is exposed to the client. There’s nothing that Vue.js (or any other front-end framework) can do with this.

Instead, use a client-side library to format the dates. Many exist, such as Date-fns, Luxon, or Moment. Or, you might consider using a library made specifically for Vue, such as vue-filter-date-format.