假设:
<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("svg").append('<circle cx="100" cy="50" r="40" stroke="black" stroke-width="2" fill="red"/>');
});
</script>
</head>
<body>
<svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 100" width="200px" height="100px">
</svg>
</body>
为什么我什么都看不到?
发现了一个简单的方法,适用于我所有的浏览器(Chrome 49, Edge 25, Firefox 44, IE11, Safari 5 [Win], Safari 8 (MacOS)):
// Clean svg content (if you want to update the svg's objects)
// Note : .html('') doesn't works for svg in some browsers
$('#svgObject').empty();
// add some objects
$('#svgObject').append('<polygon class="svgStyle" points="10,10 50,10 50,50 10,50 10,10" />');
$('#svgObject').append('<circle class="svgStyle" cx="100" cy="30" r="25"/>');
// Magic happens here: refresh DOM (you must refresh svg's parent for Edge/IE and Safari)
$('#svgContainer').html($('#svgContainer').html());
.svgStyle
{
fill:cornflowerblue;
fill-opacity:0.2;
stroke-width:2;
stroke-dasharray:5,5;
stroke:black;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="svgContainer">
<svg id="svgObject" height="100" width="200"></svg>
</div>
<span>It works if two shapes (one square and one circle) are displayed above.</span>