export function passwordCheck(pass) {
    var score = 0;
    if (!pass) return score;
  
    // award every unique letter until 5 repetitions
    var letters = new Object();
    for (var i = 0; i < pass.length; i++) {
      letters[pass[i]] = (letters[pass[i]] || 0) + 1;
      score += 5.0 / letters[pass[i]];
    }
  
    // bonus points for mixing it up
    var variations = {
      digits: /d/.test(pass),
      lower: /[a-z]/.test(pass),
      upper: /[A-Z]/.test(pass),
      nonWords: /W/.test(pass),
    };
  
    var variationCount = 0;
    for (var check in variations) {
      variationCount += variations[check] == true ? 1 : 0;
    }
    score += (variationCount - 1) * 10;
  
    return parseInt(score);
  }
  
  export function checkPassStrength(pass) {
    var score = passwordCheck(pass);
    if (score > 80) return "Strong";
    if (score > 60) return "Good";
    if (score >= 30) return "Weak";
    return "";
  }
    

Today password strength is extremely important to keep your data secure. As web developers/designers we need a way to show our users the strength of their password. Here we provide a easiest way to check how strong your password really is. It comes with 3 tier such as strong , good and weak. Make sure your password is in the strong category. happy coding