@page "/testpage"

<div class="row">
    <div class="col-2">
<TelerikButton ButtonType="ButtonType.Button" OnClick="@(() => tog = !tog)">Toggle</TelerikButton>
<div class="@(tog == false ? "d-none" : "d-inline")">
    <TelerikTextArea Name="textName" Id="text" AutoSize="true" @bind-Value="@Text"></TelerikTextArea>
</div>
    </div>
</div>

@code {

    public string Text { get; set; }
    public bool tog { get; set; } = false;

    protected override async Task OnInitializedAsync()
    {
        Text = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren,";

    }

    
}