Welcome to ShenZhenJia Knowledge Sharing Community for programmer and developer-Open, Learning and Share
menu search
person
Welcome To Ask or Share your Answers For Others

Categories

I am trying to make a login form in which I have email address and password as the textbox. I have done the validation on the email address part so that it should have proper email address and also on the empty check both for email address and password text box.

Here is my jsfiddle.

As of now, I have added an alert box saying, Invalid if email address and password textbox is empty. Instead of that, I would like to show a simple message just below each text box saying , please enter your email address or password if they are empty?

Just like it has been done here on sitepoint blog.

Is this possible to do in my current HTML form?

Update:-

<body>

    <div id="login">

        <h2>
            <span class="fontawesome-lock"></span>Sign In
        </h2>

        <form action="login" method="POST">
            <fieldset>
                <p>
                    <label for="email">E-mail address</label>
                </p>
                <p>
                    <input type="email" id="email" name="email">
                </p>
                <p>
                    <label for="password">Password</label>
                </p>
                <p>
                    <input type="password" name="password" id="password">
                </p>
                <p>
                    <input type="submit" value="Sign In">
                </p>

            </fieldset>

        </form>

    </div>
    <!-- end login -->

</body>

And my JS -

<script>
    $(document).ready(function() {
        $('form').on('submit', function (e) {
            e.preventDefault();

            if (!$('#email').val()) {
                if ($("#email").parent().next(".validation").length == 0) // only add if not added
                {
                    $("#email").parent().after("<div class='validation' style='color:red;margin-bottom: 20px;'>Please enter email address</div>");
                }
            } else {
                $("#email").parent().next(".validation").remove(); // remove it
            }
            if (!$('#password').val()) {
                if ($("#password").parent().next(".validation").length == 0) // only add if not added
                {
                    $("#password").parent().after("<div class='validation' style='color:red;margin-bottom: 20px;'>Please enter password</div>");

                }
            } else {
                $("#password").parent().next(".validation").remove(); // remove it
            }
        }); 
    });

</script>

I am working with JSP and Servlets so as soon as I click Sign In button, it was taking me to another page with valid email and password earlier but now nothing is happening after I click Sign In button with valid email and password.

Any thoughts what could be wrong?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
thumb_up_alt 0 like thumb_down_alt 0 dislike
229 views
Welcome To Ask or Share your Answers For Others

1 Answer

You could put static elements after the fields and show them, or you could inject the validation message dynamically. See the below example for how to inject dynamically.

This example also follows the best practice of setting focus to the blank field so user can easily correct the issue.

Note that you could easily genericize this to work with any label & field (for required fields anyway), instead of my example which specifically codes each validation.

Your fiddle is updated, see here: jsfiddle

The code:

$('form').on('submit', function (e) {
    var focusSet = false;
    if (!$('#email').val()) {
        if ($("#email").parent().next(".validation").length == 0) // only add if not added
        {
            $("#email").parent().after("<div class='validation' style='color:red;margin-bottom: 20px;'>Please enter email address</div>");
        }
        e.preventDefault(); // prevent form from POST to server
        $('#email').focus();
        focusSet = true;
    } else {
        $("#email").parent().next(".validation").remove(); // remove it
    }
    if (!$('#password').val()) {
        if ($("#password").parent().next(".validation").length == 0) // only add if not added
        {
            $("#password").parent().after("<div class='validation' style='color:red;margin-bottom: 20px;'>Please enter password</div>");
        }
        e.preventDefault(); // prevent form from POST to server
        if (!focusSet) {
            $("#password").focus();
        }
    } else {
        $("#password").parent().next(".validation").remove(); // remove it
    }
});  

The CSS:

    .validation
    {
      color: red;
      margin-bottom: 20px;
    }

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
thumb_up_alt 0 like thumb_down_alt 0 dislike
Welcome to ShenZhenJia Knowledge Sharing Community for programmer and developer-Open, Learning and Share
...