Animating a path's dashed stroke using stroke-dasharray and stroke-dashoffset, similar to this example. This version ensures that there's no little "seam" at the end of a closed path by dynamically setting the dash array and the animation keyframe to a factor of the computed path length.
stroke-dashadjust might make this easier eventually.
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <style> | |
| path { | |
| fill: none; | |
| stroke: black; | |
| stroke-width: 2px; | |
| -webkit-animation: move 0.4s infinite linear; | |
| -moz-animation: move 0.4s infinite linear; | |
| animation: move 0.4s infinite linear; | |
| } | |
| @-webkit-keyframes move { | |
| 0% { | |
| stroke-dashoffset: 0; | |
| } | |
| } | |
| @-moz-keyframes move { | |
| 0% { | |
| stroke-dashoffset: 0; | |
| } | |
| } | |
| @keyframes move { | |
| 0% { | |
| stroke-dashoffset: 0; | |
| } | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="960" height="500"> | |
| <path d="M636.5,315c-0.4-18.7,1.9-27.9-5.3-35.9 | |
| c-22.7-25-107.3-2.8-118.3,35.9c-7,24.4,20.6,37.2,16,71c-4,29.6-30.8,60.7-56.5,61.1c-30.8,0.4-32.9-43.8-81.7-70.2 | |
| c-50.9-27.6-110.1-12.9-125.2-9.2c-66.1,16.4-82.2,56.9-109.2,47.3c-38-13.6-55.9-112.1-19.8-143.5c39-34,121.2,27.7,148.1-3.8 | |
| c18-21.1,3.1-74.3-25.2-105.3c-31.1-34.1-70.1-32.4-105.3-76.3c-8.2-10.2-16.9-23.8-15.3-39.7c1.2-11.4,7.5-23.3,15.3-29 | |
| c33.8-25,101.6,62.6,193.1,59.5c40.1-1.3,38.7-18.5,99.2-38.9c126.2-42.6,242.4-4.9,297.7,13c54.7,17.7,105.4,35,129.8,82.4 | |
| c13,25.3,22.9,67.7,4.6,87c-11.6,12.3-25.1,5.1-46.6,20.6c-2.8,2-28.9,21.4-32.1,49.6c-3.1,27.4,18.7,35,29,70.2 | |
| c8.8,30.1,8.5,77.8-18.3,99.2c-32.3,25.8-87,0.6-100-5.3c-69.6-32-67.2-88.4-73.3-109.2z"/> | |
| </svg> | |
| <script> | |
| var path = document.querySelector("path"), | |
| dash = path.getTotalLength() / 100, | |
| offset = -dash * 2; | |
| // Set the dasharray to something that divides evenly into the total length | |
| path.style.strokeDasharray = dash + "," + dash; | |
| // Add a 100% keyframe that offsets by one full dash group | |
| [].slice.call(document.styleSheets).forEach(function(stylesheet){ | |
| [].slice.call(stylesheet.cssRules).forEach(function(rule){ | |
| if (rule.name === "move") { | |
| rule.appendRule("100% { stroke-dashoffset: " + offset + "; }"); | |
| } | |
| }); | |
| }); | |
| </script> |
