JSFiddle - React, Tailwind, and code Playground

HTML

<textarea readonly="readonly">Dummy text</textarea>
<textarea readonly="readonly">Dummy</textarea>
<textarea readonly="readonly">Dummy text also</textarea>
<textarea readonly="readonly">Lorem ipsum</textarea>
<textarea readonly="readonly">Foo bar</textarea>

JavaScript

$('textarea').focus(function() {
    var $this = $(this);
    $this.select().mouseup(function() {
        $this.off('mouseup');
        return false;
    });
}).keyup(function(e) {
    if(e.which === 9) {
        this.select();
    }
});