Question

How can I create an expandable menu with only HTML5 and CSS3?

I want to display only 4 menu items and a view all list item, where clicking view all should expand all of the list items.

Answer 1

There are several ways to make it! For example the following.
The HTML looks like this. There is a div, that you click and a div underneath that will expand. This is only possible with the pseudo-selector :target.

<div class="accordion">
    <div id="one" class="section">
            <h3>
                    <a href="#one">Heading 1</a>
            </h3>
            <div>
                    <p>Content</p>
            </div>
    </div>
    <div id="two" class="section">
            <h3>
                    <a href="#two">Heading 2</a>
            </h3>
            <div>
                    <p>Content</p>
            </div>
    </div>
</div>​




.accordion h3 + div {
        height: 0;
        overflow: hidden;
        -webkit-transition: height 0.3s ease-in;
        -moz-transition: height 0.3s ease-in;
        -o-transition: height 0.3s ease-in;
        -ms-transition: height 0.3s ease-in;
        transition: height 0.3s ease-in;
}

.accordion :target h3 + div {
        height: 100px;
}

.accordion .section.large:target h3 + div {
        overflow: auto;
}

I made a working Fiddle for you. Have a look at it: Check me out!