JSFiddle - React, Tailwind, and code Playground

JavaScript

var str1 = "A & B & C";
var str2 = "A > B > C";
var str3 = "A & B & C > D < X";

str1 = str1.replace(/\&amp\;/g, '&');
str2 = str2.replace(/\&gt\;/g, '>');
str3 = str3.replace(/\&amp\;/g, '&').replace(/\&gt\;/g, '>').replace(/\&lt\;/g, '<');

console.log(str1);
console.log(str2);
console.log(str3);