I want to create a triangular border button that contains an exclamation point.
I hope this button disappears when the button is clicked.
This is my code at the moment. I do not know what to do.
<style>
.triangle {
width: 50px;
height: 50px;
border: 1px solid red;
border-radius: 10px;
background-color: white;
}
</style>
<table style="margin: 7px" layout="column" layout-align="start start">
<tbody>
<tr>
<th class="table" >clear</th>
</tr>
<tr style="text-align: center">
<td><form><input type=submit value="!" class="triangle"></form></td>
</tbody>
</table>