JSFiddle - React, Tailwind, and code Playground

HTML

Replace String:
<input type="text" id="blah" />
<br/>Text:
<input type="text" id="area" />
<br/>
<button onclick="myReplace()">Replace</button>

JavaScript

function myReplace() {
    var search = $('#blah').val();
    var regex = new RegExp(search, 'g');
    var replaced = $('#area').val().replace(regex, 'text2'); 
    $('#area').val(replaced);
}