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November 11, 2016 09:46
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JavaScript smooth scrolling with interpolation.
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Example</title> | |
| <style>.amazingDiv {position: relative;top: 2000px;padding-bottom: 1000px;}</style> | |
| </head> | |
| <body> | |
| <div class="amazingDiv"> | |
| Interpolation, bro. | |
| </div> | |
| <script type="text/javascript" src="https://gist.githubusercontent.com/SysVoid/d659b67c2de1e789fa67891c61b88435/raw/smoothScroll.js"></script> | |
| </body> | |
| </html> |
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| const smoothScroll = (element, time, callback) => { | |
| if (time == null) { | |
| time = 500; | |
| } | |
| let delta = 1000 / 30; | |
| let timeElapsed = 0; | |
| let from = window.scrollY; | |
| let to = element.getBoundingClientRect().top; | |
| let interval = setInterval(() => { | |
| let progress = timeElapsed / time; | |
| let y = (progress * to) + ((1 - progress) * from); | |
| window.scrollTo(0, y); | |
| timeElapsed += delta; | |
| if (timeElapsed >= time) { | |
| window.scrollTo(0, to); | |
| window.clearInterval(interval); | |
| if (typeof callback === 'function') { | |
| callback(); | |
| } | |
| } | |
| }, delta); | |
| } |
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| function smoothScroll(element, time, callback) { | |
| if (time == null) { | |
| time = 500; | |
| } | |
| var delta = 1000 / 30; | |
| var timeElapsed = 0; | |
| var from = window.scrollY; | |
| var to = element.getBoundingClientRect().top; | |
| var interval = setInterval(function () { | |
| var progress = timeElapsed / time; | |
| var y = (progress * to) + ((1 - progress) * from); | |
| window.scrollTo(0, y); | |
| timeElapsed += delta; | |
| if (timeElapsed >= time) { | |
| window.scrollTo(0, to); | |
| window.clearInterval(interval); | |
| if (typeof callback === 'function') { | |
| callback(); | |
| } | |
| } | |
| }, delta); | |
| } |
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