JSFiddle - React, Tailwind, and code Playground

HTML

<span>line1</span>
<div id="div1" class="no-underline">
    <div id="div2" class="no-underline">subline1</div>
    <div>subline2</div>
</div>

CSS

body {
    font-family: Arial;
    font-size: 8px;
    color: rgb(255, 0, 85);
    font-weight: bold;
    font-style: italic;
    text-decoration: underline;
}
#div1 {
    color: black !important;
}
#div2 {
    color: green;
}
.no-underline {
    text-decoration:none !important;
}