csslayout/contents/mega-menu.mdx

---
category: Navigation
created: '2019-12-29'
description: Create a mega menu with CSS
keywords: css mega menu
thumbnail: /assets/css-layout/thumbnails/mega-menu.png
title: Mega menu
---

## HTML

```html index.html
<div class="mega-menu">
    <!-- Item -->
    <div class="mega-menu__item">...</div>

    <!-- An item that triggers displaying the mega menu -->
    <div class="mega-menu__item mega-menu__trigger">
        <!-- The trigger item's content -->
        <div>...</div>

        <!-- Mega menu -->
        <div class="mega-menu__content">...</div>
    </div>

    <!-- Item -->
    <div class="mega-menu__item">...</div>
</div>
```

## CSS

```css styles.css
.mega-menu {
    /* Used to position the mega menu */
    position: relative;
}

.mega-menu__trigger:hover .mega-menu__content {
    /* Show the mega menu when hovering the trigger item */
    display: block;
}

.mega-menu__content {
    /* Border */
    border: 1px solid #d1d5db;
    margin-top: -1px;

    /* Hidden by default */
    display: none;

    /* Absolute position */
    left: 0px;
    position: absolute;
    top: 100%;

    /* Take full width */
    width: 100%;

    /* Displayed on top of other elements */
    background: #fff;
    z-index: 9999;
}
```

<Playground>
```css placeholders.css hidden
.lines {
    padding: 0.25rem 0;
    width: 100%;
    align-items: center;
    display: flex;
    justify-content: center;
    flex-direction: column;
}
.line {
    background: #d1d5db;
    height: 1px;
    margin-bottom: 0.25rem;
}
.line.line--20 {
    width: 20%;
}
.line.line--40 {
    width: 40%;
}
.line.line--60 {
    width: 60%;
}
.line.line--80 {
    width: 80%;
}
.line.line--100 {
    width: 100%;
}
.rectangle {
    background: #d1d5db;
    border-radius: 0.25rem;
    height: var(--rectangle-height);
    width: var(--rectangle-width);
}
.rectangle--hor.rectangle--20 {
    --rectangle-width: 20%;
}
.rectangle--hor.rectangle--40 {
    --rectangle-width: 40%;
}
.rectangle--hor.rectangle--60 {
    --rectangle-width: 60%;
}
.rectangle--hor.rectangle--80 {
    --rectangle-width: 80%;
}
.rectangle--hor.rectangle--100 {
    --rectangle-width: 100%;
}
.rectangle--hor.rectangle--sm {
    --rectangle-height: 0.5rem;
}
.rectangle--hor.rectangle--md {
    --rectangle-height: 2rem;
}
.rectangle--hor.rectangle--lg {
    --rectangle-height: 4rem;
}
.rectangle--ver.rectangle--20 {
    --rectangle-height: 20%;
}
.rectangle--ver.rectangle--40 {
    --rectangle-height: 40%;
}
.rectangle--ver.rectangle--60 {
    --rectangle-height: 60%;
}
.rectangle--ver.rectangle--80 {
    --rectangle-height: 80%;
}
.rectangle--ver.rectangle--100 {
    --rectangle-height: 100%;
}
.rectangle--ver.rectangle--sm {
    --rectangle-width: 0.5rem;
}
.rectangle--ver.rectangle--md {
    --rectangle-width: 2rem;
}
.rectangle--ver.rectangle--lg {
    --rectangle-width: 4rem;
}
.triangle {
    border-style: solid;
    height: 0;
    width: 0;
}
.triangle--t {
    border-color: transparent transparent #d1d5db transparent;
    border-width: 0 var(--triangle-size) var(--triangle-size) var(--triangle-size);
}
.triangle--r {
    border-color: transparent transparent transparent #d1d5db;
    border-width: var(--triangle-size) 0 var(--triangle-size) 1rem;
}
.triangle--b {
    border-color: #d1d5db transparent transparent transparent;
    border-width: var(--triangle-size) var(--triangle-size) 0 var(--triangle-size);
}
.triangle--l {
    border-color: transparent #d1d5db transparent transparent;
    border-width: var(--triangle-size) 1rem var(--triangle-size) 0;
}
.triangle--tr {
    border-color: transparent #d1d5db transparent transparent;
    border-width: 0 var(--triangle-size) var(--triangle-size) 0;
}
.triangle--br {
    border-color: transparent transparent #d1d5db transparent;
    border-width: 0 0 var(--triangle-size) var(--triangle-size);
}
.triangle--bl {
    border-color: transparent transparent transparent #d1d5db;
    border-width: var(--triangle-size) 0 0 var(--triangle-size);
}
.triangle--tl {
    border-color: #d1d5db transparent transparent transparent;
    border-width: var(--triangle-size) var(--triangle-size) 0 0;
}
.triangle--sm {
    --triangle-size: 0.5rem;
}
.triangle--md {
    --triangle-size: 2rem;
}
.triangle--lg {
    --triangle-size: 4rem;
}
```

```css styles.css hidden
.mega-menu {
    align-items: center;
    display: flex;
    justify-content: center;

    position: relative;

    border: 1px solid #d1d5db;
    border-radius: 0.25rem;

    /* Demo */
    width: 100%;
}

.mega-menu__item {
    display: flex;
    align-items: center;

    height: 100%;
    flex: 1;

    padding: 0.25rem 0.5rem;
}
.mega-menu__item:not(:last-child) {
    border-right: 1px solid #d1d5db;
}

.mega-menu__trigger {
    cursor: pointer;

    /* Demo */
    height: 2rem;

    align-items: center;
    display: flex;
    justify-content: center;
}

.mega-menu__content {
    /* Border */
    border: 1px solid #d1d5db;
    /* margin-top: -1px; */

    /* Hidden by default */
    display: none;

    /* Position it right below the trigger element */
    left: 0;
    padding-top: 0.25rem;
    position: absolute;
    top: 100%;

    /* Take full width */
    width: 100%;

    /* It should be on the top of other elements */
    background-color: #fff;
    z-index: 9999;
}

/* Show the mega menu when hovering the trigger item */
.mega-menu__trigger:hover .mega-menu__content {
    display: block;
}
```

```html index.html hidden
<div class="mega-menu">
    <div class="mega-menu__item">
        <div class="rectangle rectangle--hor rectangle--sm rectangle--100"></div>
    </div>
    <div class="mega-menu__item mega-menu__trigger">
        <div class="rectangle rectangle--hor rectangle--sm rectangle--100"></div>
        <div class="triangle triangle--b triangle--sm"></div>
        <div class="mega-menu__content">
            <div class="mega-menu__body">
                <div class="lines">
                    <div class="line line--80"></div>
                    <div class="line line--40"></div>
                    <div class="line line--100"></div>
                    <div class="line line--60"></div>
                    <div class="line line--20"></div>
                </div>
            </div>
        </div>
    </div>
    <div class="mega-menu__item">
        <div class="rectangle rectangle--hor rectangle--sm rectangle--100"></div>
    </div>
</div>
```
</Playground>