csslayout/client/patterns/nested-dropdowns/Details.tsx

/**
 * A collection of popular layouts and patterns made with CSS (https://csslayout.io)
 * (c) 2019 - 2020 Nguyen Huu Phuoc <https://twitter.com/nghuuphuoc>
 */

import React from 'react';
import { Helmet } from 'react-helmet';

import './nested-dropdowns.css';

import RelatedPatterns from '../../components/RelatedPatterns';
import Pattern from '../../constants/Pattern';
import DetailsLayout from '../../layouts/DetailsLayout';
import BrowserFrame from '../../placeholders/BrowserFrame';

const Details: React.FC<{}> = () => {
    return (
        <DetailsLayout title="Nested dropdowns">
            <Helmet>
                <meta name="description" content="Create nested dropdown menu with CSS" />
                <meta name="keywords" content="css dropdown menu, css multi-level dropdown menu, css nested dropdown menu" />
            </Helmet>
            <div style={{ padding: '64px 32px' }}>
                <div style={{ lineHeight: 1.5, marginBottom: '16px' }}>
                    Hover on the Patterns &rarr; Navigation to see the sub dropdowns.
                </div>
                <BrowserFrame
                    content={(
                        <div
                            style={{
                                padding: '8px',
                            }}
                        >
                            <ul className="p-nested-dropdowns">
                                <li>Home</li>
                                <li>
                                    <div>Patterns</div>
                                    <ul>
                                        <li>Layout</li>
                                        <li>Input</li>
                                        <li>
                                            <div>Navigation</div>
                                            <ul>
                                                <li>Breadcrumb</li>
                                                <li>Dropdown</li>
                                                <li>Menu</li>
                                                <li>Nested dropdown</li>
                                            </ul>
                                        </li>
                                        <li>Display</li>
                                        <li>Feedback</li>
                                    </ul>
                                </li>
                                <li>Products</li>
                                <li>About</li>
                            </ul>
                        </div>
                    )}
                    source={`
<style>
/* The root */
.p-nested-dropdowns {
    /* Border */
    border: 1px solid rgba(0, 0, 0, 0.3);
    display: flex;

    /* Reset list styles */
    list-style-type: none;
    margin: 0;
    padding: 0;
}

.p-nested-dropdowns li {
    /* Spacing */
    padding: 8px;

    /* Used to position the sub dropdown */
    position: relative;
}

/* The sub dropdown */
.p-nested-dropdowns ul {
    /* Border */
    border: 1px solid rgba(0, 0, 0, 0.3);

    /* Hidden by default */
    display: none;

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

    /* Reset styles */
    list-style-type: none;
    margin: 0;
    padding: 0;

    /* Width */
    width: 200px;
}

/* The second level sub dropdown */
.p-nested-dropdowns ul ul {
    left: 100%;
    position: absolute;
    top: 0;
}

/* Change background color of list item when being hovered */
.p-nested-dropdowns li:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* Show the direct sub dropdown when hovering the list item */
.p-nested-dropdowns li:hover > ul {
    display: block;
}
</style>

<ul class="p-nested-dropdowns">
    <li>Home</li>
    <li>
        <div>Patterns</div>
        <!-- First level sub dropdown -->
        <ul>
            <li>Layout</li>
            <li>Input</li>
            <li>
                <div>Navigation</div>
                <!-- Second level sub dropdown -->
                <ul>
                    <li>Breadcrumb</li>
                    <li>Dropdown</li>
                    <li>Menu</li>
                    <li>Nested dropdown</li>
                </ul>
            </li>
            <li>Display</li>
            <li>Feedback</li>
        </ul>
    </li>
    <li>Products</li>
    <li>About</li>
</ul>
`}
                />
            </div>

            <RelatedPatterns patterns={[Pattern.Dropdown, Pattern.Menu]} />
        </DetailsLayout>
    );
};

export default Details;