const alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

const numbers = "0123456789";

const symbols = "!@#$%^&*_-+=";

​

const passwordTxt = document.getElementById("password");

const length = document.getElementById("length");

const incNumbers = document.getElementById("numbers");

const incSymbols = document.getElementById("symbols");

const generateBtn = document.getElementById("generate");

​

generateBtn.addEventListener("click", () => {

  let characters = alpha;

  incNumbers.checked ? (characters += numbers) : "";

  incSymbols.checked ? (characters += symbols) : "";

  passwordTxt.value = generatePassword(length.value, characters);

});

​

const generatePassword = (length, characters) => {

  let password = "";

  for (let i = 0; i < length; i++) {

    password += characters.charAt(

      Math.floor(Math.random() * characters.length)

    );

  }

  return password;

};

​

const copyBtn = document.getElementById("copy");

copyBtn.addEventListener("click", () => {

  passwordTxt.select();

  document.execCommand("copy");

  alert("Password Copied");

});