sb-test-clicker/src/components/buttlon.js

npm install

import "./button.css";

const declOfNum = (n, titles) => {
  return titles[
    n % 10 === 1 && n % 100 !== 11
      ? 0
      : n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20)
      ? 1
      : 2
  ];
};

const addButton = (el) => {
  let button = document.createElement("button");
  let i = 0;
  const titles = ["клик", "клика", "кликов"];
  el.appendChild(button);
  const updateButton = () => {
    button.innerText = `${i} ${declOfNum(i, titles)}`;
  };
  updateButton();
  button.addEventListener("click", (e) => {
    i++;
    updateButton();
  });
};

export default addButton;