JSFiddle - React, Tailwind, and code Playground

HTML

<textarea rows=4 id="mytextarea">John,2&#13;&#10;Jane,3&#13;&#10;John,4&#13;&#10;Jane,5</textarea>

JavaScript

var textAreaValue = document.getElementById("mytextarea").value;
textAreaValue = textAreaValue.replace(/\s/g, ""); //remove white space

var rows = textAreaValue.replace(/(&#[13|10];)+/g, "\n").split("\n");
console.log(rows);