I am not sure, but you can not full custom a svg only with css. However, if you will do it won't be cross browser. In the past I used svg for creating a complex map and for me the solution was rapheljs.
EDIT:
Using @phonicx calculus for radius i modified the code, having something which is able to customize each circle ( in case if you have more ) :
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<circle data-precentage='100' cx="168" cy="179" r="59" fill="red" />
<circle data-precentage='120' cx="74" cy="100" r="59" fill="black" />
</svg>
As Phillip suggested in the comment above you can do this with CSS 3 transform.
circle:hover {
-webkit-transform: scale(x, y);
}
("-webkit" prefix is for Chrome only)
See https://developer.mozilla.org/en-US/docs/Web/CSS/transform
Here's a working example with CSS transitions too: http://jsbin.com/sozewiso/2
As per the SVG 1.1 specification you can't style the r
attribute of an SVG circle using CSS https://www.w3.org/TR/SVG/styling.html#SVGStylingProperties. But you can do:
<circle cx="168" cy="179" r="59"
fill="white" stroke="black"
onmouseover="evt.target.setAttribute('r', '72');"
onmouseout="evt.target.setAttribute('r', '59');"/>
In SVG 2, which is partially supported by some modern browsers, you can style the r
attribute of circles using CSS. https://www.w3.org/TR/SVG2/styling.html#PresentationAttributes
This should work for you.
jsfiddle
You need to manipulate the radius and this can only be done via javascript:
$(function () {
$("svg circle").on("mouseenter", function () {
var oldR = $(this).attr("r");
var newR = (((oldR*2)/100)*120)/2; // 120% width
$(this).attr("r", newR);
});
});
I was working on something else and came across this question. I'm doing something similar and using greensock. I animated the scale on a couple circles using Greensock, GSAP. I needed to animate tranformOrigin and the scale property:
TweenMax.staggerFrom(".circle",1,{scale:0,transformOrigin:"50% 50%",ease:Bounce.easeOut}, .08);
Example https://codepen.io/grmdgs/pen/RgjdPv
Greensock https://greensock.com/