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const elementIsInFocus = (el) => (el === document.activeElement);
// Returns true if the element is in focus, otherwise returns false
elementIsInFocus(anyElement)

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const getRandomHexColor = () => {
  const randomValue = Math.floor(Math.random() * 0xffffff);
  const hexValue = randomValue.toString(16);
  return hexValue.padStart(6, "0");
};

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// for lightweight strings this is well-enough
const reverse = str => str.split('').reverse().join('');

// more performant way for not lightweight strings :)
const reverseString = (string) => {
  let reversedString = "";

  for (let i = string.length - 1; i >= 0; i--)
    reversedString += string[i];

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// The below source code performs 20 times faster than the one line version
const isObjectEmpty = (object) => {
  if (object.constructor !== Object) return false;
  // Iterates over the keys of an object, if
  // any exist, return false.
  for (_ in object) return false;
  return true;
};

// one line version

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/**
 * Returns the provided URLs search parameters
 * as a set of key-value pairs.
 */
const getURLParameters = (url) => {
  const { searchParams } = new URL(url);
  return Object.fromEntries(searchParams);
};

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// for big array it is more performant
const removeDuplicates = (array) => {
  const uniqueValues = [];
  const seenMap = {};

  for (const item of array) {
    if (seenMap[item]) continue;
    seenMap[item] = true;
    uniqueValues.push(item);
  }