Function to generate random characters according to the length provided

generate-random-chars.js

function generateUniqueID(length) {
  const characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
  let uniqueID = '';

  while (uniqueID.length < length) {
    const randomIndex = Math.floor(Math.random() * characters.length);
    const randomChar = characters.charAt(randomIndex);
    
    // Make sure the generated character is not already in the uniqueID
    if (!uniqueID.includes(randomChar)) {
      uniqueID += randomChar;
    }
  }

  return uniqueID;
}

const uniqueID = generateUniqueID(5);
console.log(uniqueID);