JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id=comment>josh marie anne josh anne marie chloe josh anne josh marie anne josh anne marie chloe josh anne</textarea>

CSS

#comment{
  
  width:400px;
  height:200px;
  
}

JavaScript

var p = 'josh';
var username = 'JJJ';

$("#comment").val($("#comment").val().replace(p, username));