我尝试在HTML (SVG(/CSS/JS中做一个动画虚线。
这是我的第一个svg动画...显然...我什么都不懂。
首先，这是我的虚线：
<svg id="bf7de8ba-cf75-48ab-a36c-06f8d86635d5" data-name="Calque 1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 690.814 824.302">
<defs>
<style>
.a00cb6af-c716-4d00-9962-797e598003da,
.a6fde9f6-9a2f-4715-ac34-678948a4d015,
.b963f74d-80cb-4571-80bd-9cf5cd28cce2 {
fill:none;
stroke-miterlimit:10;
stroke-width:6px;
}
.a6fde9f6-9a2f-4715-ac34-678948a4d015 {
stroke:url(#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0);
}
.b963f74d-80cb-4571-80bd-9cf5cd28cce2 {
stroke-dasharray:30.322 50.536;
stroke:url(#a958eb71-8928-4250-a898-e2a9df336375);
}
.a00cb6af-c716-4d00-9962-797e598003da {
stroke:url(#a8cb66bd-35fa-45ad-b9b6-1af210f764d2);
}
</style>
<linearGradient id="bef7cd12-3404-46dc-ac0f-c9d91ddd83d0" x1="60.835" y1="123.864" x2="751.668" y2="123.864" gradientUnits="userSpaceOnUse">
<stop offset="0" stop-color="#ec6608"/>
<stop offset="0.494" stop-color="#c33089"/>
<stop offset="1" stop-color="#662483"/>
</linearGradient>
<linearGradient id="a958eb71-8928-4250-a898-e2a9df336375" x1="60.835" y1="541.828" x2="751.668" y2="541.828" xlink:href="#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0"/>
<linearGradient id="a8cb66bd-35fa-45ad-b9b6-1af210f764d2" x1="60.835" y1="932.54" x2="751.668" y2="932.54" xlink:href="#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0"/>
</defs>
<path class="a6fde9f6-9a2f-4715-ac34-678948a4d015" d="M748.213,116.426c.215,4.461.381,9.478.436,14.992" transform="translate(-60.835 -116.281)"/>
<path id="pathRecrut" class="b963f74d-80cb-4571-80bd-9cf5cd28cce2" d="M745.947,181.853c-3.573,34.83-7.4,65.457-20.713,85.466-36.276,54.511-150.309,41.2-247.4,29.872-73.484-8.575-74.824-17.343-139.4-21.446-87.16-5.538-141.016-8.96-191.49,24.51-48.083,31.886-87.4,93.472-82.723,159.319.847,11.934,4.189,59.01,39.83,91.915,35.144,32.448,81.33,32.315,131.744,32.171,53.366-.154,56.932-10.359,130.213-18.383,52.244-5.721,100.335-10.606,160.085,1.532,36.964,7.508,74.081,20.657,109.532,43.659,26.491,17.189,49.773,32.776,59.745,62.809,1.48,4.457,13.436,42.337-6.894,72.766-14.348,21.475-39.623,31.524-81.957,36.766-67.779,8.391-105.681-4.654-182.3-16.086-41.6-6.206-132.521-17.593-227.49-.766-22.971,4.071-60.931,12.4-91.149,42.894-7.9,7.968-23.347,23.951-29.872,49.787a99.225,99.225,0,0,0-1.1,42.916" transform="translate(-60.835 -116.281)"/>
<path class="a00cb6af-c716-4d00-9962-797e598003da" d="M81.983,925.674a117,117,0,0,0,6.74,13.39" transform="translate(-60.835 -116.281)"/>
</svg>在代码笔上看到：https://codepen.io/Unrillaz/pen/gNmgjW
我已经用Illustrator(adobe(制作了它。
所以我尝试对这一行进行动画处理，我已经按照本教程 fron CSS-TRICKS ： https://css-tricks.com/scroll-drawing/
和。。。。多田！我有什么 ：
// Get a reference to the <path>
var path = document.querySelector('#pathRecrut');
// Get length of path... ~577px in this case
var pathLength = path.getTotalLength();
// Make very long dashes (the length of the path itself)
path.style.strokeDasharray = pathLength + ' ' + pathLength;
// Offset the dashes so the it appears hidden entirely
path.style.strokeDashoffset = pathLength;
// Jake Archibald says so
// https://jakearchibald.com/2013/animated-line-drawing-svg/
path.getBoundingClientRect();
// When the page scrolls...
window.addEventListener("scroll", function(e) {
// What % down is it?
// https://stackoverflow.com/questions/2387136/cross-browser-method-to-determine-vertical-scroll-percentage-in-javascript/2387222#2387222
// Had to try three or four differnet methods here. Kind of a cross-browser nightmare.
var scrollPercentage = (document.documentElement.scrollTop + document.body.scrollTop) / (document.documentElement.scrollHeight - document.documentElement.clientHeight);
// Length to offset the dashes
var drawLength = pathLength * scrollPercentage;
// Draw in reverse
path.style.strokeDashoffset = pathLength - drawLength;
// When complete, remove the dash array, otherwise shape isn't quite sharp
// Accounts for fuzzy math
if (scrollPercentage >= 0.99) {
path.style.strokeDasharray = "none";
} else {
path.style.strokeDasharray = pathLength + ' ' + pathLength;
}
});<svg id="bf7de8ba-cf75-48ab-a36c-06f8d86635d5" data-name="Calque 1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 690.814 824.302">
<defs>
<style>
.a00cb6af-c716-4d00-9962-797e598003da,
.a6fde9f6-9a2f-4715-ac34-678948a4d015,
.b963f74d-80cb-4571-80bd-9cf5cd28cce2 {
fill:none;
stroke-miterlimit:10;
stroke-width:6px;
}
.a6fde9f6-9a2f-4715-ac34-678948a4d015 {
stroke:url(#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0);
}
.b963f74d-80cb-4571-80bd-9cf5cd28cce2 {
stroke-dasharray:30.322 50.536;
stroke:url(#a958eb71-8928-4250-a898-e2a9df336375);
}
.a00cb6af-c716-4d00-9962-797e598003da {
stroke:url(#a8cb66bd-35fa-45ad-b9b6-1af210f764d2);
}
</style>
<linearGradient id="bef7cd12-3404-46dc-ac0f-c9d91ddd83d0" x1="60.835" y1="123.864" x2="751.668" y2="123.864" gradientUnits="userSpaceOnUse">
<stop offset="0" stop-color="#ec6608"/>
<stop offset="0.494" stop-color="#c33089"/>
<stop offset="1" stop-color="#662483"/>
</linearGradient>
<linearGradient id="a958eb71-8928-4250-a898-e2a9df336375" x1="60.835" y1="541.828" x2="751.668" y2="541.828" xlink:href="#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0"/>
<linearGradient id="a8cb66bd-35fa-45ad-b9b6-1af210f764d2" x1="60.835" y1="932.54" x2="751.668" y2="932.54" xlink:href="#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0"/>
</defs>
<path class="a6fde9f6-9a2f-4715-ac34-678948a4d015" d="M748.213,116.426c.215,4.461.381,9.478.436,14.992" transform="translate(-60.835 -116.281)"/>
<path id="pathRecrut" class="b963f74d-80cb-4571-80bd-9cf5cd28cce2" d="M745.947,181.853c-3.573,34.83-7.4,65.457-20.713,85.466-36.276,54.511-150.309,41.2-247.4,29.872-73.484-8.575-74.824-17.343-139.4-21.446-87.16-5.538-141.016-8.96-191.49,24.51-48.083,31.886-87.4,93.472-82.723,159.319.847,11.934,4.189,59.01,39.83,91.915,35.144,32.448,81.33,32.315,131.744,32.171,53.366-.154,56.932-10.359,130.213-18.383,52.244-5.721,100.335-10.606,160.085,1.532,36.964,7.508,74.081,20.657,109.532,43.659,26.491,17.189,49.773,32.776,59.745,62.809,1.48,4.457,13.436,42.337-6.894,72.766-14.348,21.475-39.623,31.524-81.957,36.766-67.779,8.391-105.681-4.654-182.3-16.086-41.6-6.206-132.521-17.593-227.49-.766-22.971,4.071-60.931,12.4-91.149,42.894-7.9,7.968-23.347,23.951-29.872,49.787a99.225,99.225,0,0,0-1.1,42.916" transform="translate(-60.835 -116.281)"/>
<path class="a00cb6af-c716-4d00-9962-797e598003da" d="M81.983,925.674a117,117,0,0,0,6.74,13.39" transform="translate(-60.835 -116.281)"/>
</svg>在代码笔上看到：https://codepen.io/Unrillaz/pen/ZdeezN
我不明白为什么这条线在我制作动画时是实心的。
我想要相同的动画。当您向下滚动时会填充自己的一条线，但我想保持虚线。你认为这可能吗？
标准的"线条绘制"技术使用改变虚线长度来模拟绘制效果。 所以很明显，如果你的行已经有一个破折号图案，这种技术将不起作用。 至少不是直接的。
最好的解决方案是对虚线应用<mask>。 蒙版由一条覆盖原始蒙版的线(虚线(组成。 然后，我们使用标准的线条绘制虚线技术对蒙版中的线条版本进行动画处理。 从而慢慢地揭开/显示原始虚线。
// Get a reference to the <path>
var path = document.querySelector('#pathRecrut');
// Get length of path... ~577px in this case
var pathLength = path.getTotalLength();
// Make very long dashes (the length of the path itself)
path.style.strokeDasharray = pathLength + ' ' + pathLength;
// Offset the dashes so the it appears hidden entirely
path.style.strokeDashoffset = pathLength;
// When the page scrolls...
window.addEventListener("scroll", function(e) {
// What % down is it?
// https://stackoverflow.com/questions/2387136/cross-browser-method-to-determine-vertical-scroll-percentage-in-javascript/2387222#2387222
// Had to try three or four differnet methods here. Kind of a cross-browser nightmare.
var scrollPercentage = (document.documentElement.scrollTop + document.body.scrollTop) / (document.documentElement.scrollHeight - document.documentElement.clientHeight);
// Length to offset the dashes
var drawLength = pathLength * scrollPercentage;
// Draw in reverse
path.style.strokeDashoffset = pathLength - drawLength;
});<svg id="bf7de8ba-cf75-48ab-a36c-06f8d86635d5" data-name="Calque 1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 690.814 824.302">
<defs>
<style>
.a00cb6af-c716-4d00-9962-797e598003da,
.a6fde9f6-9a2f-4715-ac34-678948a4d015,
.b963f74d-80cb-4571-80bd-9cf5cd28cce2 {
fill:none;
stroke-miterlimit:10;
stroke-width:6px;
}
.a6fde9f6-9a2f-4715-ac34-678948a4d015 {
stroke:url(#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0);
}
.b963f74d-80cb-4571-80bd-9cf5cd28cce2 {
stroke-dasharray:30.322 50.536;
stroke:url(#a958eb71-8928-4250-a898-e2a9df336375);
}
.a00cb6af-c716-4d00-9962-797e598003da {
stroke:url(#a8cb66bd-35fa-45ad-b9b6-1af210f764d2);
}
</style>
<linearGradient id="bef7cd12-3404-46dc-ac0f-c9d91ddd83d0" x1="60.835" y1="123.864" x2="751.668" y2="123.864" gradientUnits="userSpaceOnUse">
<stop offset="0" stop-color="#ec6608"/>
<stop offset="0.494" stop-color="#c33089"/>
<stop offset="1" stop-color="#662483"/>
</linearGradient>
<linearGradient id="a958eb71-8928-4250-a898-e2a9df336375" x1="60.835" y1="541.828" x2="751.668" y2="541.828" xlink:href="#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0"/>
<linearGradient id="a8cb66bd-35fa-45ad-b9b6-1af210f764d2" x1="60.835" y1="932.54" x2="751.668" y2="932.54" xlink:href="#bef7cd12-3404-46dc-ac0f-c9d91ddd83d0"/>
<mask id="linemask">
<path id="pathRecrut" fill="none" stroke="white" stroke-width="10" d="M745.947,181.853c-3.573,34.83-7.4,65.457-20.713,85.466-36.276,54.511-150.309,41.2-247.4,29.872-73.484-8.575-74.824-17.343-139.4-21.446-87.16-5.538-141.016-8.96-191.49,24.51-48.083,31.886-87.4,93.472-82.723,159.319.847,11.934,4.189,59.01,39.83,91.915,35.144,32.448,81.33,32.315,131.744,32.171,53.366-.154,56.932-10.359,130.213-18.383,52.244-5.721,100.335-10.606,160.085,1.532,36.964,7.508,74.081,20.657,109.532,43.659,26.491,17.189,49.773,32.776,59.745,62.809,1.48,4.457,13.436,42.337-6.894,72.766-14.348,21.475-39.623,31.524-81.957,36.766-67.779,8.391-105.681-4.654-182.3-16.086-41.6-6.206-132.521-17.593-227.49-.766-22.971,4.071-60.931,12.4-91.149,42.894-7.9,7.968-23.347,23.951-29.872,49.787a99.225,99.225,0,0,0-1.1,42.916"/>
</mask>
</defs>
<path class="a6fde9f6-9a2f-4715-ac34-678948a4d015" d="M748.213,116.426c.215,4.461.381,9.478.436,14.992" transform="translate(-60.835 -116.281)"/>
<path class="b963f74d-80cb-4571-80bd-9cf5cd28cce2" d="M745.947,181.853c-3.573,34.83-7.4,65.457-20.713,85.466-36.276,54.511-150.309,41.2-247.4,29.872-73.484-8.575-74.824-17.343-139.4-21.446-87.16-5.538-141.016-8.96-191.49,24.51-48.083,31.886-87.4,93.472-82.723,159.319.847,11.934,4.189,59.01,39.83,91.915,35.144,32.448,81.33,32.315,131.744,32.171,53.366-.154,56.932-10.359,130.213-18.383,52.244-5.721,100.335-10.606,160.085,1.532,36.964,7.508,74.081,20.657,109.532,43.659,26.491,17.189,49.773,32.776,59.745,62.809,1.48,4.457,13.436,42.337-6.894,72.766-14.348,21.475-39.623,31.524-81.957,36.766-67.779,8.391-105.681-4.654-182.3-16.086-41.6-6.206-132.521-17.593-227.49-.766-22.971,4.071-60.931,12.4-91.149,42.894-7.9,7.968-23.347,23.951-29.872,49.787a99.225,99.225,0,0,0-1.1,42.916" transform="translate(-60.835 -116.281)" mask="url(#linemask)"/>
<path class="a00cb6af-c716-4d00-9962-797e598003da" d="M81.983,925.674a117,117,0,0,0,6.74,13.39" transform="translate(-60.835 -116.281)"/>
</svg>