code-boxx/0-HTML-STICKY-HEADER.MD

## 0-HTML-STICKY-HEADER.MD

      
    Raw
  

              0-HTML-STICKY-HEADER.MD
            
          
    STICKY HTML CSS HEADER

https://code-boxx.com/sticky-headers-html-css/
LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-sticky.css
/* (A) STICKY HEADER */
#page-head { position: sticky; top: 0; z-index: 9; }

/* (X) DOES NOT MATTER - COSMETICS */
* { font-family: arial, sans-serif; box-sizing: border-box; }
body { padding: 0; margin: 0; }
#page-nav, #page-head, #page-main { padding: 20px; }
#page-nav { background: #f5ddff; }
#page-head { color: #fff; background: #464646; }
#page-main { height: 3000px; } /* extra height for testing */

## 1-sticky.html
<!DOCTYPE html>
<html>
  <head>
    <title>Sticky Header Demo</title>
    <link rel="stylesheet" type="text/css" href="1-sticky.css">
  </head>
  <body>
    <!-- (A) NAV BAR -->
    <nav id="page-nav">TOP NAV</nav>

    <!-- (B) STICKY HEADER -->
    <header id="page-head">HEADER</header>

    <!-- (C) CONTENTS -->
    <main id="page-main">CONTENTS</main>
  </body>
</html>

## 2-fixed.css
/* (A) HEADER */
#page-head {
  position: fixed; top: 0; left: 0; z-index: 9; /* fixed at top */
  width: 100%; height: 60px; padding: 10px;     /* dimensions */
  display: flex; align-items: center;           /* alignment */
}

/* (B) CONTENTS */
/* add top spacing to prevent being covered by header */
#page-main { margin-top: 80px; padding: 10px; }

/* (X) COSMETICS - DOES NOT MATTER */
* { font-family: arial, sans-serif; box-sizing: border-box; }
body { padding: 0; margin: 0; }
#page-head { color: #fff; background: #464646; }
#page-main { height: 3000px; } /* extra height for testing */

## 2-fixed.html
<!DOCTYPE html>
<html>
  <head>
    <title>Fixed Header Demo</title>
    <link rel="stylesheet" type="text/css" href="2-fixed.css">
  </head>
  <body>
    <!-- (A) STICKY HEADER -->
    <header id="page-head">HEADER</header>

    <!-- (B) CONTENTS -->
    <main id="page-main">CONTENTS</main>
  </body>
</html>

## 3-stuck.css
/* (A) STICKY HEADER */
#page-head { position: sticky; top: -1px; z-index: 9; }
#page-head.stuck { background: red; }

/* (X) DOES NOT MATTER - COSMETICS */
* { font-family: arial, sans-serif; box-sizing: border-box; }
body { padding: 0; margin: 0; }
#page-nav, #page-head, #page-main { padding: 20px; }
#page-nav { background: #f5ddff; }
#page-head { color: #fff; background: #464646; }
#page-main { height: 3000px; } /* extra height for testing */

## 3-stuck.html
<!DOCTYPE html>
<html>
  <head>
    <title>Sticky Header Demo</title>
    <link rel="stylesheet" type="text/css" href="3-stuck.css">
    <script src="3-stuck.js"></script>
  </head>
  <body>
    <!-- (A) NAV BAR -->
    <nav id="page-nav">TOP NAV</nav>

    <!-- (B) STICKY HEADER -->
    <header id="page-head">HEADER</header>

    <!-- (C) CONTENTS -->
    <main id="page-main">CONTENTS</main>
  </body>
</html>

## 3-stuck.js
// CREDITS : https://davidwalsh.name/detect-sticky
window.addEventListener("load", () => {
  const observer = new IntersectionObserver(
    ([e]) => e.target.classList.toggle("stuck", e.intersectionRatio < 1),
    { threshold: [1] }
  );
  observer.observe(document.getElementById("#page-head"));
});
	/* (A) STICKY HEADER */
	#page-head { position: sticky; top: 0; z-index: 9; }

	/* (X) DOES NOT MATTER - COSMETICS */
	* { font-family: arial, sans-serif; box-sizing: border-box; }
	body { padding: 0; margin: 0; }
	#page-nav, #page-head, #page-main { padding: 20px; }
	#page-nav { background: #f5ddff; }
	#page-head { color: #fff; background: #464646; }
	#page-main { height: 3000px; } /* extra height for testing */
	<!DOCTYPE html>
	<html>
	<head>
	<title>Sticky Header Demo</title>
	<link rel="stylesheet" type="text/css" href="1-sticky.css">
	</head>
	<body>
	<!-- (A) NAV BAR -->
	<nav id="page-nav">TOP NAV</nav>

	<!-- (B) STICKY HEADER -->
	<header id="page-head">HEADER</header>

	<!-- (C) CONTENTS -->
	<main id="page-main">CONTENTS</main>
	</body>
	</html>
	/* (A) HEADER */
	#page-head {
	position: fixed; top: 0; left: 0; z-index: 9; /* fixed at top */
	width: 100%; height: 60px; padding: 10px; /* dimensions */
	display: flex; align-items: center; /* alignment */
	}

	/* (B) CONTENTS */
	/* add top spacing to prevent being covered by header */
	#page-main { margin-top: 80px; padding: 10px; }

	/* (X) COSMETICS - DOES NOT MATTER */
	* { font-family: arial, sans-serif; box-sizing: border-box; }
	body { padding: 0; margin: 0; }
	#page-head { color: #fff; background: #464646; }
	#page-main { height: 3000px; } /* extra height for testing */
	/* (A) STICKY HEADER */
	#page-head { position: sticky; top: -1px; z-index: 9; }
	#page-head.stuck { background: red; }

	/* (X) DOES NOT MATTER - COSMETICS */
	* { font-family: arial, sans-serif; box-sizing: border-box; }
	body { padding: 0; margin: 0; }
	#page-nav, #page-head, #page-main { padding: 20px; }
	#page-nav { background: #f5ddff; }
	#page-head { color: #fff; background: #464646; }
	#page-main { height: 3000px; } /* extra height for testing */
	// CREDITS : https://davidwalsh.name/detect-sticky
	window.addEventListener("load", () => {
	const observer = new IntersectionObserver(
	([e]) => e.target.classList.toggle("stuck", e.intersectionRatio < 1),
	{ threshold: [1] }
	);
	observer.observe(document.getElementById("#page-head"));
	});