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Simple jQuery scrollspy script
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Document</title> | |
| </head> | |
| <body> | |
| <header> | |
| <nav> | |
| <a href="#sec1">sec1</a> | |
| <a href="#sec2">sec2</a> | |
| <a href="#sec3">sec3</a> | |
| <a href="#sec4">sec4</a> | |
| <a href="#sec5">sec5</a> | |
| </nav> | |
| </header> | |
| <section id="sec1"></section> | |
| <section id="sec2"></section> | |
| <section id="sec3"></section> | |
| <section id="sec4"></section> | |
| <section id="sec5"></section> | |
| <style> | |
| header { | |
| height: 20px; | |
| background-color: #fff; | |
| position: fixed; | |
| top: 0; | |
| width: 100%; | |
| } | |
| nav a { | |
| color: #000; | |
| } | |
| nav a.active { | |
| color: red; | |
| } | |
| body, html { | |
| margin: 0; | |
| padding: 0; | |
| } | |
| section { | |
| height: 100vh; | |
| } | |
| #sec1 { background-color: cyan; } | |
| #sec2 { background-color: purple; } | |
| #sec3 { background-color: green; } | |
| #sec4 { background-color: violet; } | |
| #sec5 { background-color: brown; } | |
| </style> | |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script> | |
| <script type="text/javascript"> | |
| //scrollSpy function | |
| function scrollSpy() { | |
| var sections = ['sec1', 'sec2', 'sec3', 'sec4', 'sec5']; | |
| var current; | |
| for (var i = 0; i < sections.length; i++) { | |
| if ( $('#'+sections[i]).offset().top <= $(window).scrollTop() ) { | |
| current = sections[i]; | |
| } | |
| } | |
| $("nav a[href='#"+current+"']").addClass('active'); | |
| $("nav a").not("a[href='#"+current+"']").removeClass('active'); | |
| } | |
| // smooth scrolling navigation | |
| $("nav a").click( function() { | |
| var target = $(this).attr("href"); | |
| $("body, html").animate({ | |
| scrollTop: $(target).offset().top | |
| }, 300); | |
| return false; | |
| }); | |
| //scrollSpy call | |
| $(document).ready( function() { | |
| scrollSpy(); | |
| }); | |
| $(window).scroll( function() { | |
| scrollSpy(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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