How to implement row hover in Blazor wasm

Question

I have a Blazor table component that changes based on the number of variable rows in a collection:

<table id="MyTable" class="table table-hover">
    <thead>
        <tr>
            <th>Project name</th>
            <th>Description</th>
            <th>Uploader</th>
            <th>Upload Date</th>
        </tr>
    </thead>

    @foreach (var item in Items)
    {
        <tbody>
            <tr>
                <th>@item.Name</th>
                <th>@item.Description</th>
                <th>@item.UserName</th>
                <th>@item.UploadDate.ToString("dd-MM-yyyy")</th>
                <th><button type="button" class="btn btn-primary" @onclick="() => DoSomething()">Do Work</button></th>
            </tr>
        </tbody>
    }
</table>

What I need to do is, when the mouse is hovering over a row,onlythat specific element of that row becomes enabled.

For example, if this table has 10 rows (1-10), when I hover over row 1, only the button for row 1 should be visible and clickable. Other buttons whose parent row has no hover should not be enabled.

In Blazor, how do I enable only the buttons on that specific row when hovering over a row?

Answer 1

As mentioned in the comments, there are some reasons why you might not want to show child elements on mouseover: it relies on the user using the mouse. Alternatively, the entire row can be made clickable, which may provide a better user experience.

Though for the sake of completeness, here is how to solve the problem I asked:

In the Razor page, add CSS Id selectors for the row (parent) and button (child) HTML tags:

@foreach (var item in Items)
    {
        <tbody>
            <tr id="FileTableRow">
                <th>@item.Name</th>
                <th>@item.Description</th>
                <th>@item.UserName</th>
                <th>@item.UploadDate.ToString("dd-MM-yyyy")</th>
                <th><button id="FileTableRowButton" type="button" class="btn btn-primary" @onclick="() => DoSomething()">Do Work</button></th>
            </tr>
        </tbody>
    }

We can then use CSS to apply styles to the button (child) on hover over the row (parent):

#FileTableRowButton {
  visibility: hidden;
}

#FileTableRow {
  &:hover {
    #FileTableRowButton {
      visibility: visible;
    }
  }
}

Depending on your use case, you may want to apply different styles. For example, use display: none; instead of visibility: hidden;