Password Validation

Overview

It is recommended to select good a password security policy that the site members would need to adhere to. Since the password rank is measured using complex algorithm, ExpressionEngine is providing an AJAX endpoint that can return password strength prior to for submission.

Validation URL

{exp:member:validation_url fields="password_rank"}

Return URL that is serving as the endpoint for validating member data and getting password rank. It can only accept POST requests sent via AJAX. It returns a JSON string that can contain following keys:

• success - (boolean) indicates whether the posted values validate. Is not included for password_rank requests
• errors - array of validation errors, if present
• rank - (int) password rank
• rank_text - (string) password rank name (Weak, Good, Strong, Very Strong)

Parameters

fields="password_rank"

Specify which fields you want to validate. The default value is all which means all posted fields are validated. Other supported options are:

• username - validate posted username. Returns
• email - validate posted email
• screen_name - validate posted screen name
• password - validate posted password, and also return password rank
• password_rank - return password rank only

Example of JavaScript for the password strength indicator

<script type="text/javascript">
    var validationUrl = '{exp:member:validation_url fields="password_rank"}';

    // Creat visual password strength meter block
    var rankWrap = '<div class="rank-wrap"><p class="status-tag "><span class="rank_text"></span></p></div>';

    // Find password input
    var passwordInput = document.querySelector('input[name="password"]');

    // Create wrapper container. It can be added in the html part and needed for the correct positioning of the password strength meter block on the page 
    var wrapper = document.createElement('span');

    passwordInput.parentNode.insertBefore(wrapper, passwordInput);

    // move passwordInput into wrapper
    wrapper.appendChild(passwordInput);

    // Closest parent for password input
    var passwordInputContainer = passwordInput.parentElement;

    passwordInputContainer.style.position = 'relative';
    passwordInputContainer.style.display = 'block';

    // Insert visual password strength meter block after password input
    passwordInput.insertAdjacentHTML('afterend', rankWrap);

    document.getElementsByName('password')[0].addEventListener('keyup', function(e){
        var inputValLength = this.value.length;

        //create a new XMLHttpRequest object
        var request = new XMLHttpRequest();

        //configure it to do an asynchronous GET request for some URL
        request.open("POST", validationUrl, true);
        request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        request.setRequestHeader("X-Requested-With", "XMLHttpRequest");

        //add a listener for the "load" event, which
        //will happen when the data returns
        request.addEventListener("load", function() {
            if (request.status >= 200 && request.status < 400) {
                var data = JSON.parse(request.responseText);
                if (inputValLength == 0) {
                    document.querySelector('.rank-wrap').style.display = 'none';
                    document.querySelector('.rank-wrap > p').className = '';
                    document.querySelector('.rank-wrap .rank_text').textContent = '';
                } else {
                    var rank_text = data['rank_text'].toLowerCase();
                    var classList = 'status-tag ' + rank_text;
                    document.querySelector('.rank-wrap > p').className = classList;
                    document.querySelector('.rank-wrap .rank_text').textContent = rank_text;
                    document.querySelector('.rank-wrap').style.display = 'block';
                }
            } else {

            }
        });

        //finally, send the request to the server
        request.send('password=' + e.target.value);
    });
</script>

Example of styles for the password strength indicator

<style type="text/css">
    form label {
        display: block;
        color: #0d0d19;
        margin-bottom: 5px;
        font-weight: 500;
    }

    form input:not([type="submit"]) {
        display: block;
        width: 100%;
        padding: 8px 15px;
        font-size: 1rem;
        line-height: 1.6;
        color: #0d0d19;
        background-color: #fff;
        background-image: none;
        transition: border-color .2s ease,box-shadow .2s ease;
        -webkit-appearance: none;
        border: 1px solid #cbcbda;
        border-radius: 5px;
    }

    /* Styles for the main password strength indicator wrapper */

    .rank-wrap {
        position: absolute;
        right: 15px;
        top: 10px;
        background: #fff;
        text-transform: uppercase;
    }

    /* Default styles for the password strength indicator text wrap */

    .rank-wrap .status-tag {
        background: none;
        text-transform: uppercase;
        border: 1px solid transparent;
        font-family: Roboto,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Ubuntu,"Helvetica Neue",Oxygen,Cantarell,sans-serif;
        display: inline-block;
        padding: 3px 8px 2px;
        color: #8f90b0;
        font-size: 12px;
        font-weight: 500;
        letter-spacing: 1px;
        border-radius: 3px;
        margin: 0;
    }

    /* Styles for strong and very strong password */

    .rank-wrap .status-tag.strong {
        border-color: #00c571;
        color: #00c571;
    }

    /* Styles for good password */

    .rank-wrap .status-tag.good {
        border-color: #ffb40b;
        color: #ffb40b;
    }

    /* Styles for weak password */

    .rank-wrap .status-tag.weak {
        border-color: #fa5252;
        color: #fa5252;
    }
</style>

ExpressionEngine 7 Docs
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