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HTML

CSS

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HTML

              
                <body class="container-fluid bg-body-tertiary d-block">
    <div class="row justify-content-center">
        <div class="row justify-content-center">
            <div class="col-12 col-md-6 col-lg-4" style="min-width: 500px;">
                <div class="card bg-white mb-5 mt-5 border-0" style="box-shadow: 0 12px 15px rgba(0, 0, 0, 0.02);">
                    <div class="card-body p-5">
    
                        <label for="password-input" class="form-label fw-bold">Password</label>
                        <input type="password" class="form-control" id="password-input" autocomplete="off"
                               aria-autocomplete="list"
                               aria-label="Password" aria-describedby="passwordHelp">
                        <div class="password-meter">
                            <div class="meter-section rounded me-2"></div>
                            <div class="meter-section rounded me-2"></div>
                            <div class="meter-section rounded me-2"></div>
                            <div class="meter-section rounded"></div>
                        </div>
                        <div id="passwordHelp" class="form-text text-muted">Use 8 or more characters with a mix of
                            letters, numbers &
                            symbols.
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</body>
              
            
!

CSS

              
                .password-meter {
    display: flex;
    height: 5px;
    margin-top: 10px;
}

.meter-section {
    flex: 1;
    background-color: #ddd;
}

.weak {
    background-color: #ff4d4d;
}

.medium {
    background-color: #ffd633;
}

.strong {
    background-color: #00b300;
}

.very-strong {
    background-color: #009900;
}
              
            
!

JS

              
                const passwordInput = document.getElementById('password-input');
const meterSections = document.querySelectorAll('.meter-section');

passwordInput.addEventListener('input', updateMeter);

function updateMeter() {
    const password = passwordInput.value;
    let strength = calculatePasswordStrength(password);

    // Remove all strength classes
    meterSections.forEach((section) => {
        section.classList.remove('weak', 'medium', 'strong', 'very-strong');
    });

    // Add the appropriate strength class based on the strength value
    if (strength >= 1) {
        meterSections[0].classList.add('weak');
    }
    if (strength >= 2) {
        meterSections[1].classList.add('medium');
    }
    if (strength >= 3) {
        meterSections[2].classList.add('strong');
    }
    if (strength >= 4) {
        meterSections[3].classList.add('very-strong');
    }
}

function calculatePasswordStrength(password) {
    const lengthWeight = 0.2;
    const uppercaseWeight = 0.5;
    const lowercaseWeight = 0.5;
    const numberWeight = 0.7;
    const symbolWeight = 1;

    let strength = 0;

    // Calculate the strength based on the password length
    strength += password.length * lengthWeight;

    // Calculate the strength based on uppercase letters
    if (/[A-Z]/.test(password)) {
        strength += uppercaseWeight;
    }

    // Calculate the strength based on lowercase letters
    if (/[a-z]/.test(password)) {
        strength += lowercaseWeight;
    }

    // Calculate the strength based on numbers
    if (/\d/.test(password)) {
        strength += numberWeight;
    }

    // Calculate the strength based on symbols
    if (/[^A-Za-z0-9]/.test(password)) {
        strength += symbolWeight;
    }

    return strength;
}
              
            
!
999px

Console