JSFiddle - React, Tailwind, and code Playground

HTML

<input class="problem" type="text" value="some text" readonly unselectable="on" />

CSS

.problem[readonly]{
    color:red;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}