121

I have some SVG files that specifies width and height as well as viewbox like this: 

<svg width="576pt" height="432pt" viewBox="0 0 576 432" > ...

but how to display them in the browser at a size I decide? I want them smaller and have tried:

<object width="400" data="image.svg"></object>

but then I get visible scrollbars.

It works if I change the SVG files to set width and height to 100% instead, but I want to decide the size in the HTML regardless of what sizes are used in the SVG file. Is this possible ?

Let see. I had to refresh my memory on SVG, I haven't used it much these years.

From what I found today, it seems that if you specify dimension of objects without units, they have a fixed size (in pixels, I think). Apparently, then, there is no way to resize them when you resize the SVG (it only change the viewport/canvas size).

Unless, as pointed out, you specify the size of the SVG in percentage OR specify a viewBox (eg. viewBox="0 0 600 500").

Now, if you have no way to change the exported SVG, you are out of luck, I fear. What library do you use?

4

9 回答 9

166

You can add "preserveAspectRatio" and "viewBox" attributes to the <svg> tag to accomplish this.

Open the .svg file in an editor and find the <svg> tag. in that tag, add the following attributes:

preserveAspectRatio="xMinYMin meet"
viewBox="0 0 {width} {height}"

Replace {width} and {height} with some defaults for the viewBox. I used the values from the "width" and "height" attributes of the SVG tag and it seemed to work.

Save the SVG and it should now scale as expected.

I found this information here:

https://blueprints.launchpad.net/inkscape/+spec/allow-browser-resizing

于 2010-08-14T19:41:21.487 回答
35

None of the answers given here worked for me when I asked this back in 2009. As I now had the same issue again I noticed that using the <img> tag and width together with an svg works fine.

<img width="400" src="image.svg">
于 2011-11-15T13:49:33.443 回答
11 
<body>

<div>
<object type="image/svg+xml" data="img/logo.svg">
   <img src="img/logo.svg" alt="Browser fail" />
</object>
</div>

img/logo.svg ...

<svg
   width="100%" 
   height="100%"
   viewBox="0 0 640 80"
   xmlns="http://www.w3.org/2000/svg"
   version="1.1" />

This setup worked for me.

于 2012-10-18T22:39:49.580 回答
10

You can reach into the embedded svg using JavaScript:

var svg = document.getElementsByTagName('object')[0].\
  contentDocument.getElementsByTagName('svg')[0];
svg.removeAttribute('width');
svg.removeAttribute('height');

Since your svg already has a viewBox, Firefox should scale the 576 pixel width in the viewBox to the 400 pixel width in your document. Other svgs might benefit from a new viewBox derived from the advertised width and height (these are often the same numbers). Other browsers might benefit from different svg tweaks.

于 2009-08-08T04:43:31.827 回答
9

I encountered a problem where iOS on an iPad would not correctly resize SVG images in a <object> tag.

The CSS style would increase or decrease size of the <object> container, but the image inside of it would not be modified (on iPad, iOS 7).

The SVG images were exported from Adobe Illustrator, and the solution turned out to be replacing the width and height in this:

<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
width="481.89px" height="294.843px" viewBox="0 0 481.89 294.843" 
enable-background="new 0 0 481.89 294.843"
xml:space="preserve">

with:

width="100%" height="100%"

I needed to use the <object> tag because the <img> tag does not currently support embedding bitmapped images in SVG's.

于 2014-07-29T15:59:07.700 回答
5

  1. Set the missing viewbox and fill in the height and width values of the set height and height attributes in the svg tag

  2. Then scale the picture simply by setting the height and width to the desired percent values. Good luck.

  3. You can set a fixed aspect ratio with preserveAspectRatio="x200Y200 meet, but it's not necessary

e.g.

 <svg
   xmlns:dc="http://purl.org/dc/elements/1.1/"
   xmlns:cc="http://creativecommons.org/ns#"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:xlink="http://www.w3.org/1999/xlink"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   width="10%" 
   height="10%"
   preserveAspectRatio="x200Y200 meet"
   viewBox="0 0 350 350"
   id="svg2"
   version="1.1"
   inkscape:version="0.48.0 r9654"
   sodipodi:docname="namesvg.svg">
于 2011-09-16T19:30:06.830 回答
4

Just use CSS to make the browser resize the SVG! Like so: <object style="width:30%"> See http://www.vlado-do.de/svg_test/ for more details. I just also tried it locally with an SVG that has its width and height given in "pt". It works well in Firefox.

于 2012-04-11T16:04:56.113 回答
1

Here is a PHP solution using QueryPath based on Jim Keller's answer.

Once QueryPath is loaded just pass your svg script to the function.

function scaleableSVG($svg){
    $qp = qp($svg, 'svg');
    $width = $qp->attr('width');
    $height = $qp->attr('height');
    $qp->removeAttr('width')->removeAttr('height');                       
    $qp->attr('preserveAspectRatio', "xMinYMin meet");
    $qp->attr('viewBox', "0 0 $width $height");
    return $qp->html();
}
于 2014-05-04T13:48:24.200 回答
1

让我们看看。我不得不刷新我对 SVG 的记忆，这些年来我没有用太多。

从我今天发现的情况来看，如果您指定没有单位的对象的尺寸，它们的尺寸是固定的（我认为以像素为单位）。显然，当您调整 SVG 大小时，无法调整它们的大小（它只会更改视口/画布大小）。

除非，正如所指出的，您以百分比指定 SVG 的大小或指定 viewBox（例如 viewBox="0 0 600 500"）。

现在，如果您无法更改导出的 SVG，恐怕您就不走运了。你用什么图书馆？

于 2009-03-14T10:07:38.230 回答