Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <nav id="pnProductNav" class="pn-ProductNav">
    <div id="pnProductNavContents" class="pn-ProductNav_Contents">
        <a href="#" class="pn-ProductNav_Link" aria-selected="true">Chairs</a>
        <a href="#" class="pn-ProductNav_Link">Tables</a>
        <a href="#" class="pn-ProductNav_Link">Cookware</a>
        <a href="#" class="pn-ProductNav_Link">Beds</a>
        <a href="#" class="pn-ProductNav_Link">Desks</a>
        <a href="#" class="pn-ProductNav_Link">Flooring</a>
        <a href="#" class="pn-ProductNav_Link">Lighting</a>
        <a href="#" class="pn-ProductNav_Link">Mattresses</a>
        <a href="#" class="pn-ProductNav_Link">Solar Panels</a>
        <a href="#" class="pn-ProductNav_Link">Bookcases</a>
        <a href="#" class="pn-ProductNav_Link">Mirrors</a>
        <a href="#" class="pn-ProductNav_Link">Rugs</a>  
        <a href="#" class="pn-ProductNav_Link">Curtains &amp; Blinds</a>  
        <a href="#" class="pn-ProductNav_Link">Frames &amp; Pictures</a>  
        <a href="#" class="pn-ProductNav_Link">Wardrobes</a>  
        <a href="#" class="pn-ProductNav_Link">Storage</a>  
        <a href="#" class="pn-ProductNav_Link">Decoration</a>  
        <a href="#" class="pn-ProductNav_Link">Appliances</a>
		 <a href="#" class="pn-ProductNav_Link">Racks</a>
        <a href="#" class="pn-ProductNav_Link">Worktops</a>
    </div>
	<button class="pn-Advancer pn-Advancer_Left" type="button">
		<svg class="pn-Advancer_Icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 551 1024"><path d="M445.44 38.183L-2.53 512l447.97 473.817 85.857-81.173-409.6-433.23v81.172l409.6-433.23L445.44 38.18z"/></svg>
	</button>
	<button class="pn-Advancer pn-Advancer_Right" type="button">
		<svg class="pn-Advancer_Icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 551 1024"><path d="M105.56 985.817L553.53 512 105.56 38.183l-85.857 81.173 409.6 433.23v-81.172l-409.6 433.23 85.856 81.174z"/></svg>
	</button>
</nav>
              
            
!

CSS

              
                .pn-ProductNav {
    /* Make this scrollable when needed */
    overflow-x: auto;
    /* We don't want vertical scrolling */
    overflow-y: hidden;
    /* For WebKit implementations, provide inertia scrolling */
    -webkit-overflow-scrolling: touch;
    /* We don't want internal inline elements to wrap */
    white-space: nowrap;
    /* If JS present, let's hide the default scrollbar */
    .js & {
        /* Make an auto-hiding scroller for the 3 people using a IE */
        -ms-overflow-style: -ms-autohiding-scrollbar;
        /* Remove the default scrollbar for WebKit implementations */
        &::-webkit-scrollbar {
            display: none;
        }
    }
	/* positioning context for advancers */
	position: relative;
}

.pn-ProductNav_Contents {
	float: left;
}

.pn-ProductNav_Link {
	text-decoration: none;
	color: #888;
	font-size: 1.2em;
	font-family: -apple-system, sans-serif;
	display: inline-flex;
	align-items: center;
	min-height: 44px;
	& + & {
		margin-left: 11px;
		padding-left: 11px;
		border-left: 1px solid #eee;
	}
	&[aria-selected="true"] {
		color: #111;
	}
}

.pn-Advancer {
	/* Reset the button */
	appearance: none;
	background: transparent;
	padding: 0;
	border: 0;
	&:focus {
		outline: 0;
	}
	/* Now style it as needed */
	position: absolute;
	top: 0;
	bottom: 0;
}

.pn-Advancer_Left {
	left: 0;
}

.pn-Advancer_Right {
	right: 0;
}

.pn-Advancer_Icon {
	width: 20px;
	height: 44px;
	fill: #bbb;
}
              
            
!

JS

              
                document.documentElement.classList.remove("no-js");
document.documentElement.classList.add("js");

var pnProductNav = document.getElementById("pnProductNav");
var pnProductNavContents = document.getElementById("pnProductNavContents");

pnProductNav.setAttribute("data-overflowing", determineOverflow(pnProductNavContents, pnProductNav));


// Handle the scroll of the horizontal container
var last_known_scroll_position = 0;
var ticking = false;

function doSomething(scroll_pos) {
    pnProductNav.setAttribute("data-overflowing", determineOverflow(pnProductNavContents, pnProductNav));
}

pnProductNav.addEventListener("scroll", function() {
    last_known_scroll_position = window.scrollY;
    if (!ticking) {
        window.requestAnimationFrame(function() {
            doSomething(last_known_scroll_position);
            ticking = false;
        });
    }
    ticking = true;
});


function determineOverflow(content, container) {
    var containerMetrics = container.getBoundingClientRect();
    var containerMetricsRight = Math.floor(containerMetrics.right);
    var containerMetricsLeft = Math.floor(containerMetrics.left);
    var contentMetrics = content.getBoundingClientRect();
    var contentMetricsRight = Math.floor(contentMetrics.right);
    var contentMetricsLeft = Math.floor(contentMetrics.left);
	 if (containerMetricsLeft > contentMetricsLeft && containerMetricsRight < contentMetricsRight) {
        return "both";
    } else if (contentMetricsLeft < containerMetricsLeft) {
        return "left";
    } else if (contentMetricsRight > containerMetricsRight) {
        return "right";
    } else {
        return "none";
    }
}
              
            
!
999px

Console