Using a variable outside its function

Question

I want to use the checkedCount variable inside of the generatePassword function in order to not call the function matrixEffect at the end of generatePassword if the value of checkedCount is 0.

I used the argument checkedCountValue to be able to use the variable outside its function. But because I'm calling the generatePassword function at the end of updateSafetyIndicator I'm receiving the error "RangeError: Maximum call stack size exceeded" due to an infinite call of these functions.

const lengthSlider = document.querySelector(".length-wrapper input"),
options = document.querySelectorAll(".container input"),
generateBtn = document.querySelector(".generate-btn"),
copyBtn = document.querySelector(".copy-btn"),
passwordSafetyIndicator = document.querySelector(".safety-indicator"),
passwordInput = document.querySelector(".display-font");

const characters = {
    lowercase: "abcdefghijkilmnopqrstuvwxyz",
    uppercase: "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
    digits: "0123456789",
    specials: "^!$%&|[](){}:;.,*+-#@<>~"
}

// generate password

function generatePassword(checkedCountValue) {
    let staticPassword = "",
    randomPassword = "",
    passwordLength = lengthSlider.value;
    options.forEach(option => {
        if(option.checked) {
            staticPassword += characters[option.id];
        }
    });

    for (let i = 0; i < passwordLength; i++) {
        randomPassword += staticPassword[Math.floor(Math.random() * staticPassword.length)];
    }

    passwordInput.innerText = randomPassword;

    if (checkedCountValue > 0) {
        matrixEffect(randomPassword);
    } 

    updateSafetyIndicator();
}



// matrix effect

const letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

let interval = null;

function matrixEffect(password) {  
    let iteration = 0;
    
    clearInterval(interval);
    
    interval = setInterval(() => {
      passwordInput.innerText = passwordInput.innerText
        .split("")
        .map((letter, index) => {
          if(index < iteration) {
            return password[index];
          }
        
          return letters[Math.floor(Math.random() * 26)]
        })
        .join("");
      
      if(iteration >= lengthSlider.value){ 
        clearInterval(interval);
      }
      
      iteration += 1 / 3;
    }, 30);
  };

// safety indicator update

function updateSafetyIndicator() {

    var uppercaseCheck = document.getElementById("uppercase");
    var lowercaseCheck = document.getElementById("lowercase");
    var digitsCheck = document.getElementById("digits");
    var specialsCheck = document.getElementById("specials");
    var passwordLength = lengthSlider.value;
    var checkedCount = 0;
    
    if (uppercaseCheck.checked) {
        checkedCount++;
    }

    if (lowercaseCheck.checked) {
        checkedCount++;
    }

    if (digitsCheck.checked) {
        checkedCount++;
    }

    if (specialsCheck.checked) {
        checkedCount++;
    }

    if (checkedCount == 0) {
        passwordInput.innerText = "Please select first...";
    }

    else if (checkedCount == 1) {
        passwordSafetyIndicator.id = "veryweak";
    }

    else if (checkedCount == 2) {
        passwordSafetyIndicator.id = "weak";
    }

    else if (checkedCount == 3) {
        passwordSafetyIndicator.id = "medium";
    }

    else if (checkedCount == 4) {
        passwordSafetyIndicator.id = "strong";
    }

    if (checkedCount == 4 && passwordLength >= 10) {
        passwordSafetyIndicator.id = "verystrong";
    }

    if (checkedCount == 3 && passwordLength >= 10) {
        passwordSafetyIndicator.id = "strong";
    }

    if (checkedCount == 2 && passwordLength >= 10) {
        passwordSafetyIndicator.id = "medium";
    }

    if (checkedCount == 1 && passwordLength >= 10) {
        passwordSafetyIndicator.id = "weak";
    }

    generatePassword(checkedCount);
}

// slider length update
function updateSlider() {
    document.querySelector(".length-wrapper span").innerText = (lengthSlider.value);
}

updateSlider();


// copy password
function copyPassword(htmlElement) {
    if (!htmlElement) {
        return;
    }

    let password = passwordInput.innerText;

    let inputPassword = document.createElement("input");
    inputPassword.setAttribute("value", password);
    document.body.appendChild(inputPassword);
    inputPassword.select();
    document.execCommand("copy");
    inputPassword.parentNode.removeChild(inputPassword);
    passwordInput.innerText = "COPIED";

    setTimeout (() => {
        passwordInput.innerText = password;
    }, 1300);
}

copyBtn.onclick = function () {
    copyPassword(passwordInput);
}


    

lengthSlider.addEventListener("input", updateSlider);
generateBtn.addEventListener("click", generatePassword);