Base64 Image will not scale down using any common methods

Question

I am using KendoUI's diagram feature, and want to export the resulting construct to display as a thumbnail.

I am exporting the image, which is in Base64 format. This is then saved.

This data is then loaded into a div, and needs to be scaled to fit the div. However, I have tried absolutely every common technique to scale the image down, but it simply will not.

Currently I have something like this. It is a piece of html which is being used as a template for a keno list. There may be something here which is causing the issue, but I have failed to find it if there is.

<div id="thumbnailContainer" style="height: 100%; width: 100%;">
   <img id="thumbnail" src="#:imageData#" style="(every technique under the 
   sun tried)"
</div>

where the "#:imageData# corresponds to someBase64 image data (which correctly displays and loads otherwise)

Techniques tried:

• Background-size
• Setting background of container instead
• Adjusting height and width of img

jsFiddle

Answer 1

You didn't mention it's an SVG, not just some image. SVG is "special" when it comes to sizing. It's probably a good idea not to base64 for SVG since it doesn't save space or gain you anything. The trick is to add viewBox="0 0 W H" to the <svg> tag. In your case viewBox='0 0 2400 1200' seems to work well. If you insist on base64 you need to add it before you convert it.

Demo