JavaScript is a powerful language that allows you to accomplish a wide range of tasks. In this article, we'll explore 18 JavaScript code snippets for common tasks, from copying to clipboard and checking for dark mode to generating random integers and rounding numbers to a specific number of decimals. Let's dive in!

// 1. Copy to Clipboard
function copyToClipboard(text) {
  navigator.clipboard.writeText(text)
    .then(() => {
      console.log('Text copied to clipboard');
    })
    .catch((error) => {
      console.error('Unable to copy text: ', error);
    });
}

// 2. Scroll to Top
function scrollToTop() {
  window.scrollTo({ top: 0, behavior: 'smooth' });
}

// 3. Check for Dark Mode
function isDarkModeEnabled() {
  return window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
}

// 4. Swap Between Two Elements
function swapElements(element1, element2) {
  const sibling = element1.nextSibling;
  element2.parentNode.insertBefore(element1, element2);
  sibling ? element2.parentNode.insertBefore(element2, sibling) : element2.parentNode.appendChild(element2);
}

// 5. Capitalize a String
function capitalizeString(string) {
  return string.charAt(0).toUpperCase() + string.slice(1);
}

// 6. Reverse a String
function reverseString(string) {
  return string.split('').reverse().join('');
}

// 7. Remove Duplicates from an Array
function removeDuplicates(array) {
  return [...new Set(array)];
}

// 8. Remove Falsy Values from an Array
function removeFalsyValues(array) {
  return array.filter(Boolean);
}

// 9. Merge Multiple Arrays
function mergeArrays(...arrays) {
  return [].concat(...arrays);
}

// 10. Check if a Variable is an Array
function isArray(variable) {
  return Array.isArray(variable);
}

// 11. Clone an Array
function cloneArray(array) {
  return [...array];
}

// 12. Shuffle an Array
function shuffleArray(array) {
  const shuffledArray = [...array];
  for (let i = shuffledArray.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    [shuffledArray[i], shuffledArray[j]] = [shuffledArray[j], shuffledArray[i]];
  }
  return shuffledArray;
}

// 13. Convert RGB to Hex
function rgbToHex(red, green, blue) {
  const componentToHex = (component) => {
    const hex = component.toString(16);
    return hex.length === 1 ? '0' + hex : hex;
  };
  return `#${componentToHex(red)}${componentToHex(green)}${componentToHex(blue)}`;
}

// 14. Generate Random Hex Color
function generateRandomHexColor() {
  return `#${Math.floor(Math.random() * 16777215).toString(16)}`;
}

// 15. Generate Random Integer within a Range
function generateRandomInteger(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

// 16. Find the Average of Numbers
function findAverage(numbers) {
  const sum = numbers.reduce((acc, num) => acc + num, 0);
  return sum / numbers.length;
}

// 17. Convert a Number to Another Base
function convertToBase(number, base) {
  return number.toString(base);
}

// 18. Round a Number to a Specific Number of Decimals
function roundNumber(number, decimals) {
  return Number(number.toFixed(decimals));
}