JSFiddle - React, Tailwind, and code Playground

HTML

<input class="key select" type="text" value="bYRlJaCBHJaksjdhaAS)(§Uk8o6IfbQMemhW7TOQ" readonly />

CSS

.key {
        width: 100%;
        color: #e3e3e3;
        font-family: 'Monaco','Courier',monospace;
        font-size: 15px;
        line-height: 15px;
        border: 0;
}

JavaScript

$('.select').click(function(){
    $(this).select();
});