css before
.parent-div {
position: relative;
width: 100px;
height: 100px;
background: #ffffff;
border: 1px solid #000000;
}
.div:before {
content: "";
width: 20px;
height: 20px;
background: blue;
position: absolute;
top: 45%;
left: 45%;
}javascript insert html before element
// add without creating a new element
document.getElementById('my_id')
.insertAdjacentHTML('beforebegin', 'your_html_code');Copyright © 2021 Codeinu
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