Сергей Мельников

function noConsole() {
    console = false;
}

var debug = true;

function log(...args) {
  if (!debug) return;
  console.log(...args);
}

function silentMode() {
  debug = false;
}

log({});

silentMode();

log([]);

.then(({ results }) => {
  return results.sort((a, b) => {
    if (a.release_date < b.release_date) return 1;
    if (a.release_date > b.release_date) return -1;
    return 0;
  });
});

const Component = () => {
  const history = useHistory();

  const handler = async () => {
    await firstRequest();
    await secontRequest();
    await thirdRequest();
    history.push("/myroute");
  }

  return (...);
}

const Component = () => {
  const history = useHistory();

  const handler = async () => {
    await Promise.all([
      firstRequest(),
      secontRequest(),
      thirdRequest(),
    ]);
    history.push("/myroute");
  }

  return (...);
}

class Foo {  
  async method() {
    const items = await news.getRawMany();
    const result = await Promise.all(items.map(async (item) => {
      let category = await this.getCompanyNewsCategory(item['category_id']);
      return { id: category };
    }));
    return { items: result };
  }
}

const button = document.querySelector("button");
const target = document.querySelector("h1");
button.addEventListener("click", () => {
  target.classList.remove("error");  
  setTimeout(() => {
    target.classList.add("error");
  }, 0);
});

.error {
  animation: shake 350ms backwards ease-in-out;
  color: red;  
}

function MyClass() {
  this.fnMap = new WeakMap();
}

MyClass.prototype.method = function(fn) {
  if (this.fnMap[fn]) {
    return;
  }
  this.fnMap[fn] = true;
  fn.apply(this, []);
};