我发现我的问题解决方案很少，而且非常相似。我使用了这个How to start an animated SVG on entering viewport?。
在每个解决方案中，它都将begin属性设置为“indefinite”，但是当我这样做而不是0时，我的动画将不会运行。
这是我的代码：https://jsfiddle.net/zwcy0och/7/
我的动画应该是这样的：https://jsfiddle.net/v3p67rt4/
HTML：
<p>Scroll down</p>
<svg id="mysvg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 60">
<defs>
<clipPath id="clip-path1">
<rect id="shadow" x="0" y="-1" width="700" height="60" >
<animate attributeName="x" dur="4s" begin="indefinite" from="-700" to="0" />
</rect>
</clipPath>
</defs>
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</g><!-- black cross along with the use of `clipPath` -->
</svg>
<br>
<br>
<br>
<br>
CSS：
svg {
border: solid 1px grey;
}
p {
margin-bottom: 1000px;
}
JS：
// Get the position on the page of the SVG
var svgLocation = document.getElementById("mysvg").getBoundingClientRect();
// Scroll offset that triggers animation start.
// In this case it is the bottom of the SVG.
var offsetToTriggerAnimation = svgLocation.y + svgLocation.height;
// Function to handle the scroll event.
// Add an event handler to the document for the "onscroll" event
function scrollAnimTriggerCheck(evt)
{
var viewBottom = window.scrollY + window.innerHeight;
if (viewBottom > offsetToTriggerAnimation) {
// Start the SMIL animation
document.getElementById("anim").beginElement();
// Remove the event handler so it doesn't trigger again
document.removeEventListener("scroll", scrollAnimTriggerCheck);
}
}
// Add an event handler to the document for the "onscroll" event
document.addEventListener("scroll", scrollAnimTriggerCheck);
编辑：
感谢@Scoots！它适用于Firefox和Chrome。
但现在我有IE的问题。我在fakesmile测试中添加了这段代码，因为我使用fakesmile.js在IE中运行动画，但它不适用于“滚动功能”：
https://codepen.io/anon/pen/RQXzYP
但如果我删除“滚动功能”并设置开始0而不是无限期它在IE中工作正常：
答案 0 :(得分：1)
document.getElementById("anim") - 使用您提供的代码，这将返回null，当您尝试在其上调用.beginElement();时会导致javascript错误。