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August 29, 2015 14:04
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A smooth scroll to script
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| window.smoothScrollTo = (target_id, duration=1000) -> | |
| step = -> | |
| factor = (Date.now() - start) / duration # get interpolation factor | |
| if factor >= 1 | |
| clearInterval timer # stop animation | |
| factor = 1 # clip to max 1.0 | |
| y = factor * delta + offset | |
| window.scrollBy 0, y - window.pageYOffset | |
| target = document.getElementById(target_id).offsetTop | |
| offset = window.pageYOffset | |
| delta = target - window.pageYOffset | |
| start = Date.now() | |
| factor = 0 | |
| clearInterval timer if timer | |
| timer = setInterval(step, 10) |
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