JSFiddle - React, Tailwind, and code Playground

JavaScript

var entityMap = {
    "&": "&",
        "<": "&lt;",
        ">": "&gt;",
        '"': '&quot;',
        "'": '&#39;',
        "/": '&#x2F;'
};

function escapeHtml(string) {
    return String(string).replace(/[&<>"'\/]/g, function (s) {
        return entityMap[s];
    });
}

var html = escapeHtml('<p class="teste">Ola mundo!</p>');
document.body.innerHTML = html;