JSFiddle - React, Tailwind, and code Playground

HTML

<span>This text should not be selectable</span>
<div>
  <p>This text should be selectable</p>
</div>

CSS

div, span {
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -o-user-select: none;
    user-select: none;
}

p {
    -webkit-user-select: text;
    -khtml-user-select: text;
    -moz-user-select: text;
    -o-user-select: text;
    user-select: text;
}