这是我的问题:
我有一个非常高的 svg(1220px 高度,在视图框中设置)。
如下所示:
<svg version="1.1" id="one-diagonal" viewBox="0 0 1160 1220" >
<g>
<style type="text/css">
.st1{fill:none;stroke:#939598;stroke-width:1;stroke-miterlimit:10;}
</style>
<defs>
</defs>
<line id="XMLID_64489_" class="st1" x1="710" y1="1" x2="0" y2="1212.9"/>
</svg>
我正在使用 vivus 为我的所有 svg 设置动画:
function easeOutBounce (x) {
var base = -Math.cos(x * (0.5 * Math.PI)) + 1;
var rate = Math.pow(base,1.5);
var rateR = Math.pow(1 - x, 2);
var progress = -Math.abs(Math.cos(rate * (2.5 * Math.PI) )) + 1;
return (1- rateR) + (progress * rateR);
}
var timing,
timingProps = {
type: 'delayed',
duration: 150,
start: 'autostart',
pathTimingFunction: Vivus.LINEAR,
animTimingFunction: Vivus.LINEAR
};
function timingTest (buttonEl, property, type) {
var activeSibling = buttonEl.parentNode.querySelector('button.active');
activeSibling.classList.remove('active');
buttonEl.classList.add('active');
timingProps.type = (property === 'type') ? type : timingProps.type;
timingProps.pathTimingFunction = (property === 'path') ? Vivus[type] : timingProps.pathTimingFunction;
timingProps.animTimingFunction = (property === 'anim') ? Vivus[type] : timingProps.animTimingFunction;
timing && timing.stop().destroy();
timing = new Vivus('timing-example', timingProps);
}
pola = new Vivus('one-diagonal', {type: 'delayed', duration: 50, forceRender: true, animTimingFunction: Vivus.EASE
});
我遇到的问题是,视图框设置为 1220px 高度,动画仅在我到达 svg 底部时开始!
你可以在这里看到一个活生生的例子:http: //codepen.io/anon/pen/GZJvLm
我可以使用视口看到 vivus.js 脚本中的代码,但如果我玩弄它就不能让它工作(如果这样更清楚?)
/**
* Reply if an element is in the page viewport
*
* @param {object} el Element to observe
* @param {number} h Percentage of height
* @return {boolean}
*/
Vivus.prototype.isInViewport = function (el, h) {
var scrolled = this.scrollY(),
viewed = scrolled + this.getViewportH(),
elBCR = el.getBoundingClientRect(),
elHeight = elBCR.height,
elTop = scrolled + elBCR.top,
elBottom = elTop + elHeight;
// if 0, the element is considered in the viewport as soon as it enters.
// if 1, the element is considered in the viewport only when it's fully inside
// value in percentage (1 >= h >= 0)
h = h || 0;
return (elTop + elHeight * h) <= viewed && (elBottom) >= scrolled;
};
/**
* Alias for document element
*
* @type {DOMelement}
*/
Vivus.prototype.docElem = window.document.documentElement;
/**
* Get the viewport height in pixels
*
* @return {integer} Viewport height
*/
Vivus.prototype.getViewportH = function () {
var client = this.docElem.clientHeight,
inner = window.innerHeight;
if (client < inner) {
return inner;
}
else {
return client;
}
};
/**
* Get the page Y offset
*
* @return {integer} Page Y offset
*/
Vivus.prototype.scrollY = function () {
return window.pageYOffset || this.docElem.scrollTop;
};
它全是白色的,但如果你在底部滚动,你会看到比 svg 出现并开始动画。
当我在 svg 顶部的视图上滚动时,有什么方法可以让动画开始让我们说 100 像素?还是就在它出现的时候?
谢谢你的帮助,我很头疼,任何高光都会很棒:)