JSFiddle - React, Tailwind, and code Playground
HTML
<textarea id="txt" cols="40" rows="20"></textarea> <button onclick="replaceAccents()">نفذ</button>
JavaScript
function replaceAccents()
{
var elem;
var text = (elem = document.getElementById("txt")).value;
elem.value = text.replace(new RegExp(String.fromCharCode(1617, 124, 1614, 124, 1611, 124, 1615, 124, 1612, 124, 1616, 124, 1613, 124, 1618), "g"), "");
}