JSFiddle - React, Tailwind, and code Playground
by Retsam19
HTML
<textarea id="txt"></textarea>
<br />
<button onclick="addCharacters('\r')">\R</button>
<button onclick="addCharacters('\n')">\N</button>
<button onclick="addCharacters('\r\n')">\R\N</button>
JavaScript
var txtEl = document.getElementById("txt");
txtEl.value = "Test"
window.addCharacters = function(char) {
txtEl.value += char + "Test"
}