1<style>
2#wrapper{
3 width:150px;
4 height:150px;
5 position:relative;
6}
7
8#btn{
9 width:100%;
10 height:100%;
11 position:absolute;
12 background:none;
13 padding:15px
14}
15
16#img{
17 width:100%;
18 height:100%;
19}
20</style>
21
22<div id='wrapper'>
23 <button id='btn'>Click me</button>
24 <img id='img' src="https://images.unsplash.com/photo-1591160690555-5debfba289f0?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1000&q=80" alt="">
25</div>