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CSS

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CSS Base

About CSS Base

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HTML 

              
                <header>
    <h1>Cool Sidebar</h1>
    
</header>

<!-- NAVIGATION -->
<nav id="nav" class="nav">
    <div id="nav_icon" class="nav_icon">
        <svg class="shape_container top">
            <path class="icon_shape" d="M 0 0 L 20 0 Q 0 0 0 20 Z" />
        </svg>
        <span>MENU</span><i class="fas fa-angle-right"></i>
        <svg class="shape_container bottom">
            <path class="icon_shape" d="M 0 0 L 20 0 Q 0 0 0 20 Z" />
        </svg>
    </div>

    <ul>
        <li>
            <a href="#"><i class="fas fa-home"></i>Home</a>
        </li>
        <li>
            <a href="#sa"><i class="fas fa-hat-cowboy-side"></i>About</a>
        </li>
        <li>
            <a href="#sp"><i class="far fa-gem"></i>Projects</a>
        </li>
        <li>
            <a href="#sc"><i class="fas fa-globe-europe"></i>Customers</a>
        </li>
        <li>
            <a href="#ser"><i class="fas fa-network-wired"></i>Service</a>
        </li>
    </ul>
</nav>

<!-- MAIN -->
<main class="main">
    <section id="sa" aria-labelledby="about">
        <h2 id="about">About</h2>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
    </section>
    <section id="sp" aria-labelledby="projects">
        <h2 id="projects">Projects</h2>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
    </section>
    <section id="sc" aria-labelledby="customer">
        <h2 id="customer">Projects</h2>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
    </section>
    <section id="ser" aria-labelledby="service">
        <h2 id="service">Service</h2>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
        <p>
            Lorem ipsum dolor sit amet consectetur, adipisicing elit. Architecto dolorum voluptatum quae omnis, facere, accusamus animi consequatur molestias corrupti debitis, natus neque
            rerum. Error facilis reprehenderit harum beatae impedit praesentium tempore vitae exercitationem fugit laudantium aspernatur voluptas non consectetur voluptatem necessitatibus hic
            neque unde atque cumque ipsum veritatis, eligendi esse?
        </p>
    </section>
</main>
!

CSS 

              
                * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body,
html {
    height: 100%;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    font-size: 16px;
    line-height: 1.5;
}

nav {
    > ul {
        list-style: none;
        scrollbar-width: none;
        
        &::-webkit-scrollbar {
            width: 0;
        }
    }
    
    a {
        text-decoration: none;
    }
}

section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 5rem;

    p, 
    h2 {
        max-width: 90ch;
        margin-bottom: 2rem;
    }
    
    &:nth-child(even) {
        background-color: #f2f2f2;
    }
}

header {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    position: relative;
    background-color: #ff5964;
    background-image: linear-gradient(120deg, rgb(48, 207, 208) 10%, rgb(51, 8, 103) 95%);

    > h1 {
        text-transform: uppercase;
        text-align: center;
        font-size: 4rem;
        color: #fff;
        text-shadow: 0 0 3rem rgba(white, 0.25), 0 0 1rem rgba(white, 0.5);
        position: relative;
    }

    &::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url(https://assets.codepen.io/1753016/mountains.jpg) center center/cover;
        opacity: 0.5;
    }
}

//* SIDEBAR / NAVIGATION *//
.nav {
    // colors
    $nav_bg: #ff5964;
    $nav_link: #fff;
    $time: .2s;
    
    position: fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    left: 0;
    top: 0;
    bottom: 0;
    height: 100%;
    width: 250px;
    background-color: $nav_bg;
    transform: translateX(-100%);
    transition: transform $time ease;
    z-index: 100;

    &.open {
        transform: translateX(0);
        box-shadow: 5px 0 10px rgba(black, 0.25);
    }

    &_icon {
        position: absolute;
        display: flex;
        justify-content: center;
        align-items: center;
        top: 50%;
        right: -40px;
        width: 40px;
        height: 40px;
        border-radius: 0 10px 10px 0;
        border-right: 1px solid lighten($nav_bg, 10%);
        background-color: $nav_bg;
        cursor: pointer;
        box-shadow: 5px 0 5px rgba(black, 0.25);
        transform: translateY(-50%);
        transition: all 0.5s;

        > i {
            pointer-events: none;
            color: $nav_link;
            font-size: 1rem;
            transition: transform $time ease;

            &.rotate {
                transform: rotate(180deg);
            }
        }

        > span {
            pointer-events: none;
            font-size: 0;
            color: $nav_link;
            transform: rotate(90deg);
            transition: all $time;
        }

        > .shape_container {
            position: absolute;
            left: 0;
            height: 20px;
            width: 20px;
            z-index: 1;

            &.bottom {
                bottom: -20px;
            }
            &.top {
                top: -20px;
                transform: rotateX(180deg);
            }
            > .icon_shape {
                fill: $nav_bg;
            }
        }

        &.mouseDistance {
            transition: all $time, top 0s;
        }

        &.mouseDistanceCloser {
            height: 60px;
            width: 60px;
            right: -60px;
            border-radius: 0 30px 30px 0;

            > .shape_container {
                height: 40px;
                width: 40px;
                &.top {
                    top: -40px;
                }
                &.bottom {
                    bottom: -40px;
                }
            }

            > span {
                font-size: 10px;
            }

            > i {
                font-size: 1.5rem;
            }
        }

        &:hover {
            box-shadow: none;
        }
    }

    > ul {
        display: flex;
        flex-direction: column;
        width: 100%;
        padding: 1rem 0;
        overflow: auto;
    }

    > ul > li {
        width: 100%;
        min-height: 3rem;

        &:not(:last-child) {
            margin-bottom: 1.5rem;
        }

        > a {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
            width: 100%;
            height: 100%;
            color: darken($nav_bg, 40%);
            text-shadow: 0 1px 1px lighten($nav_bg, 5%);
            text-transform: uppercase;

            &:hover {
                color: $nav_link;
            }

            > i {
                display: block;
                font-size: 1.5rem;
                margin-bottom: .5rem;
                color: currentColor;
            }
        }
    }
}
!

JS 

              
                /**
 ** HELPER FUNCTIONS
 */
const qSel = (obj) => document.querySelector(obj);
const qSelAll = (obj) => document.querySelectorAll(obj);

/**
 ** GLOBAL VARIABLES
 */
const nav = qSel('#nav');
const nav_container = qSel('#nav_icon');
const nav_icon = qSel('#nav_icon > i');
const nav_links = qSelAll('#nav > ul > li > a');

/**
 ** OPEN SIDEBAR
 */
nav_container.addEventListener('click', () => {
    if (nav.classList.contains('open')) {
        closeSidebar();
        return;
    }
    
    nav.classList.add('open');
    nav_icon.classList.add('rotate');
});

/**
 ** CLOSE SIDEBAR AFTER CLICK ON LINK 
 */
nav_links.forEach(link => {
    link.addEventListener('click', e => {
        e.stopPropagation();
        closeSidebar();
    });
});

/**
 ** MOUSE TRACK EVENT 
 */
if (innerWidth > 980) {
    // Mouse move event
    window.addEventListener('mousemove', e => {
        const mouseY = Math.round((e.y * 100) / innerHeight);
        const mouseX = Math.round((e.x * 100) / innerWidth);

        // Detect mouse position
        if (!nav.classList.contains('open') && mouseX <= 20) {
            nav_container.style.top = `${mouseY}%`;
            nav_container.classList.add('mouseDistance');
        } else {
            nav_container.classList.remove('mouseDistance');
            nav_container.style.top = '50%';
        }
        
        // Check mouse distance to nav
        mouseX <= 10 ? 
            nav_container.classList.add('mouseDistanceCloser') : 
            nav_container.classList.remove('mouseDistanceCloser');
            
        if (nav.classList.contains('open') || (mouseY >= 90 || mouseY <= 10)) resetNavIcon();
    }); 
    
    // Mouse leave window
    document.addEventListener('mouseleave', () => {
        closeSidebar();
        resetNavIcon();
    });
};

/**
 ** CLOSE SIDEBAR WHILE CLICKING OUTSIDE
 */
window.addEventListener('click', e => {
    e.stopPropagation();
    if (!nav.classList.contains('open')) return;
    if (!e.target.closest('nav')) {
        closeSidebar();
        resetNavIcon();
    }
});

/**
 ** CLOSE SIDEBAR
 */
function closeSidebar() {
    nav.classList.remove('open');
    nav_icon.classList.remove('rotate');
}

/**
 ** RESET NAV ICON
 */
function resetNavIcon() {
    nav_container.classList.remove('mouseDistance');
    nav_container.classList.remove('mouseDistanceCloser');
    nav_container.style.top = '50%';
}
!
999px

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