make a div move after another is clicked

Question

I am trying to make something move when a link is clicked. I cannot seem to get them to work together. Anyone know how to do so.

CSS

#drop:focus #login_dropdown {
    margin-top: 0;
}
#login_dropdown {
    width: 100%;
    height: 80px;
    background-color: #ccc;
    margin-top: -80px;
}

HTML

<div id="login_dropdown" class="clearfix">
    <div class="container">
        <div id="login_dropdown_header">
             <h1>Login</h1>

        </div>
        <form action="login.php" method="post" id="login_form" class="clearfix">
            <ul id="login_reg">
                <li>
                    <input type="text" name="username" placeholder="Username">
                </li>
                <li>
                    <input type="password" name="password" placeholder="Password">
                </li>
                <li>
                    <input type="submit" value="Login">
                </li>
                <li> <a href="register.php">Register</a>

                </li>
            </ul>
        </form>
    </div>
</div>
<header class="header">
    <div class="container">
        <div id="logo"></div>
        <nav>
            <ul> <a href="index.php"><li>Home</li></a>
 <a href="ledge_base.php"><li>Knowledge Base</li></a>
 <a href="faq.php"><li>FAQ</li></a>

                <!--<a href="#"><li>Teach</li></a>--> <a href="contact.php"><li>Contact</li></a>
 <a href="#"><li id="drop">Login/Register</li></a>

            </ul>
        </nav>
    </div>
</header>

Anyways, I am trying to get #login_dropdown to change its margin to 0 when #drop is clicked on. But after clicking on it nothing happens. Can someone help me?

score 0 · Answer 1 · edited May 23 '17 at 12:18

#drop:focus #login_dropdown {
    margin-top: 0;
}

Looking at that CSS - I see your logic is that "When #drop is the focus, set margin-top to zero for #login_dropdown"

The problem is #login_dropdown isn't a descendant of #drop, it's an ascendant. There currently is no ascendant selector in CSS so you'll likely need to use javascript (or jQuery) to accomplish this.

Though it has been put forth in CSS Selectors Level 4 Spec - More info: http://coding.smashingmagazine.com/2013/01/21/sneak-peek-future-selectors-level-4/ and https://stackoverflow.com/a/1014958/497604

make a div move after another is clicked

CSS

HTML

1 Answers1