Hi,

In the startup you can extend the configuration. The configruation is described here https://docs.umbraco.com/umbraco-cms/reference/configuration/richtexteditorsettings

You can add something like this, in the ConfigureServices methods

    services.Configure<RichTextEditorConfiguration>(opts =>
    {
        opts.ValidElements += "video,audio";
    });

The .Net documentation for the configure method is found here

https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.dependencyinjection.optionsconfigurationservicecollectionextensions.configure?view=dotnet-plat-ext-7.0

Thanks for the quick reply.

As per instruction, I've added the below code but not working yet.

public void ConfigureServices(IServiceCollection services)
    {
        services.AddUmbraco(_env, _config)
            .AddBackOffice()
            .AddWebsite()
            .AddComposers()
            .Build();
        services.Configure<RichTextEditorConfiguration>(opts =>
        {
            opts.ValidElements += "div[*]";
        });
    }

It will automatically remove any custom attributes.

Eg : <div uk-grid="margin:uk-margin-large-top">{html}</div> Result : <div>{html}</div>

Is there any way to use the Extended Valid Elements Umbraco core?

Based on the document, it seems to be out of control

https://our.umbraco.com/documentation/Reference/Configuration-for-Umbraco-7-and-8/tinyMceConfig/#extended-valid-elements

is working on a reply...