Animated path drawing/erasing.
See Jake Archibald's article for more details.
Last active
August 13, 2018 14:20
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Animated paths
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| path = document.querySelector('path') | |
| length = path.getTotalLength() | |
| # clear any previous transition | |
| path.style.transition = path.style.WebkitTransition = 'none' | |
| # set starting positions | |
| path.style.strokeDasharray = "#{length} #{length}" | |
| path.style.strokeDashoffset = length | |
| # trigger a layout so styles are calculated | |
| path.getBoundingClientRect() | |
| path.style.transition = 'stroke-dashoffset 2s ease-in-out' | |
| drawn = false | |
| draw = -> | |
| drawn = true | |
| path.style.strokeDashoffset = '0' | |
| erase = -> | |
| drawn = false | |
| path.style.strokeDashoffset = length | |
| undo = -> | |
| if drawn then erase() else draw() | |
| draw() | |
| path.addEventListener("webkitTransitionEnd", undo) |
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| // Generated by CoffeeScript 1.6.3 | |
| (function() { | |
| var draw, drawn, erase, length, path, undo; | |
| path = document.querySelector('path'); | |
| length = path.getTotalLength(); | |
| path.style.transition = path.style.WebkitTransition = 'none'; | |
| path.style.strokeDasharray = "" + length + " " + length; | |
| path.style.strokeDashoffset = length; | |
| path.getBoundingClientRect(); | |
| path.style.transition = path.style.WebkitTransition = 'stroke-dashoffset 2s ease-in-out'; | |
| drawn = false; | |
| draw = function() { | |
| drawn = true; | |
| return path.style.strokeDashoffset = '0'; | |
| }; | |
| erase = function() { | |
| drawn = false; | |
| return path.style.strokeDashoffset = length - 20; | |
| }; | |
| undo = function() { | |
| if (drawn) { | |
| return erase(); | |
| } else { | |
| return draw(); | |
| } | |
| }; | |
| draw(); | |
| path.addEventListener("webkitTransitionEnd", undo); | |
| }).call(this); |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <body> | |
| <svg width="960" height="500"> | |
| <path | |
| fill="none" | |
| stroke="steelblue" | |
| stroke-width="4" | |
| stroke-miterlimit="0" | |
| stroke-dasharray="628.035 628.035" | |
| stroke-dashoffset="128.79" | |
| d="M192,354.901974927634L224,365.62566760306555C256,376.3493602784971,320,397.79674562936026,384,359.66860307380557C448,321.5404605182509,512,223.8367900562783,570,192.79610155957437C628,161.7554130628705,680,197.37770653143522,706,215.18885326571763L732,233" | |
| /> | |
| </svg> | |
| <script src="draw.js"></script> |
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