CSS Custom combobox issue
问题 I need a custom combo box. So, I implemented with ul . The problem is I can't get combo box list opens on top by clicking the button . While showing ul , it moves button to bottom of the webpage. Code: ul{ width: 100px; background-color: rgb(224, 224, 224); border-radius: 4px; border: 1px solid black; padding: 0; margin: 0; } ul li{ list-style: none; cursor: pointer; padding: 4px 10px; } li:hover{ background-color: white; } div{ width: 100%; height: 40px; background-color: bisque; } section{