admin管理员组文章数量:1180520
I'm trying to modify an svg tag with javascript to make it resizable, but my changes have no effect. The reason that I need to do this is that this tag is rendered by a library that I can't modify, and thus it seems like my only choice is to modify the svg with javascript.
I know that the tag that this script produces is correct since I am able to copy the tag to a new html document and it will work (I have included it in the sample code), so it seems like I need some way to force the svg to recognize that it has been changed (or another way to modify the svg).
Here's a HTML page that shows my problem:
<html>
<head>
<script src=".min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
var svg = $('#testsvg').find('svg')[0];
var w = svg.getAttribute('width').replace('px', '');
var h = svg.getAttribute('height').replace('px', '');
svg.removeAttribute('width');
svg.removeAttribute('height');
svg.setAttribute('viewbox', '0 0 ' + w + ' ' + h);
svg.setAttribute('preserveaspectratio', 'xminymin meet')
$(svg)
.css('width', '100%')
.css('height', '100%')
.css('background-color', 'white');
});
</script>
</head>
<body style="background-color: #333;">
<div style="width: 80%; height: 40%;">
<svg id="resultsvg" xmlns="" version="1.1" style="width: 100%; height: 100%; background-color: white; " viewbox="0 0 100 100" preserveaspectratio="xminymin meet">
<circle cx="50" cy="50" r="40" stroke="black" stroke-width="2" fill="red"></circle>
</svg>
</div>
<div id="testsvg" style="width: 80%; height: 40%;">
<svg xmlns="" version="1.1" width="100px" height="100px">
<circle cx="50" cy="50" r="40" stroke="black" stroke-width="2" fill="red" />
</svg>
</div>
</body>
</html>
I'm trying to modify an svg tag with javascript to make it resizable, but my changes have no effect. The reason that I need to do this is that this tag is rendered by a library that I can't modify, and thus it seems like my only choice is to modify the svg with javascript.
I know that the tag that this script produces is correct since I am able to copy the tag to a new html document and it will work (I have included it in the sample code), so it seems like I need some way to force the svg to recognize that it has been changed (or another way to modify the svg).
Here's a HTML page that shows my problem:
<html>
<head>
<script src="http://code.jquery.com/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function () {
var svg = $('#testsvg').find('svg')[0];
var w = svg.getAttribute('width').replace('px', '');
var h = svg.getAttribute('height').replace('px', '');
svg.removeAttribute('width');
svg.removeAttribute('height');
svg.setAttribute('viewbox', '0 0 ' + w + ' ' + h);
svg.setAttribute('preserveaspectratio', 'xminymin meet')
$(svg)
.css('width', '100%')
.css('height', '100%')
.css('background-color', 'white');
});
</script>
</head>
<body style="background-color: #333;">
<div style="width: 80%; height: 40%;">
<svg id="resultsvg" xmlns="http://www.w3.org/2000/svg" version="1.1" style="width: 100%; height: 100%; background-color: white; " viewbox="0 0 100 100" preserveaspectratio="xminymin meet">
<circle cx="50" cy="50" r="40" stroke="black" stroke-width="2" fill="red"></circle>
</svg>
</div>
<div id="testsvg" style="width: 80%; height: 40%;">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100px" height="100px">
<circle cx="50" cy="50" r="40" stroke="black" stroke-width="2" fill="red" />
</svg>
</div>
</body>
</html>
2 Answers
Reset to default 25SVG is case sensitive so
svg.setAttribute('viewbox', '0 0 ' + w + ' ' + h);
svg.setAttribute('preserveaspectratio', 'xminymin meet')
should be written
svg.setAttribute('viewBox', '0 0 ' + w + ' ' + h);
svg.setAttribute('preserveAspectRatio', 'xMinYMin meet')
width and height on the <svg> element are attributes and not styles (unlike html) so you should use setAttribute('width', '100%') rather than .css('width', '100%')
jQuery convert attribute name to lower case; e.g., instead of setting a viewBox attribute, it will set viewbox. Unfortunately, SVG (a XML dialect) element attribute names are case sensitive.
If you wanted to use jQuery consistently, you could use $.attrHooks to handle the case sensitive attributes:
['preserveAspectRatio', 'viewBox'].forEach(function(k) {
// jQuery converts the attribute name to lowercase before
// looking for the hook.
$.attrHooks[k.toLowerCase()] = {
set: function(el, value) {
if (value) {
el.setAttribute(k, value);
} else {
el.removeAttribute(k, value);
}
return true;
},
get: function(el) {
return el.getAttribute(k);
},
};
});
$(document).ready(function() {
var svg = $('#testsvg');
var w = svg.attr('width').replace('px', '');
var h = svg.attr('height').replace('px', '');
svg.attr({
width: '100%',
height: '100%',
viewBox: [0, 0, w, h].join(' '),
preserveAspectRatio: 'xMidYMid meet'
})
});
Note that el.attr('viewBox', null) would failed; your hook setter won't be called. Instead you should use el.removeAttr('viewBox') or el.attr('viewBox', false).
For other attribute like stroke, I would put them in a stylesheet.
svg {
background-color: white;
}
circle {
fill: red;
stroke: black;
stroke-width: 1px;
}
If you need to add/toggle class to change the style of a specific elements, you need to use jQuery 1.12+ or jquery 2.2+.
本文标签： jqueryModifying svg attributes with javascript has no effectStack Overflow
版权声明：本文标题：jquery - Modifying svg attributes with javascript has no effect - Stack Overflow 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://www.betaflare.com/web/1738153695a2066270.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。
发表评论