How to add border/outline/stroke to SVG elements in CSS?

I'am injecting SVG elements into a webpage thanks to D3js. I have difficulties to style these elements since syntaxes like

path { border: 3px solid green; } 

doesn't work.

How to add border/outline/stroke to SVG elements in webpages with CSS ?

3 Answers

In CSS, something like:

path { fill: none; stroke: #646464; stroke-width: 1px; stroke-dasharray: 2,2; stroke-linejoin: round; } 

Try adding CSS filter() dropshadow (this can be applied on any svg: <img>, background-image, in the dom, etc.)

or

SVG <filter> <feDropShadow>

Of course, Internet Explorer supports neither of these features.

svg { fill: #fff; } #example_1 { filter: drop-shadow(-1px -1px 0px #3e68ff) drop-shadow(2px -1px 0px #3e68ff) drop-shadow(2px 2px 0px #3e68ff) drop-shadow(-1px 2px 0px #3e68ff) }

<svg width="100" height="100" viewBox="0 0 288 288"> <path d="M144.17,77.84c-37.65,0-68.18,30.52-68.18,68.18c0,37.65,30.52,68.18,68.18,68.18 c37.65,0,68.18-30.52,68.18-68.18C212.35,108.37,181.83,77.84,144.17,77.84z M166.37,117.02c10.77,0.03,15.31,15.39,15.58,20.03 c0.15,2.47-2.95,3.15-4.21,1.21c-0.89-1.37-1.44-2.48-2.56-4.65c-1.51-2.93-4.99-6.08-8.71-6.15c-3.72-0.06-7.31,2.95-8.9,5.9 c-1.23,2.28-1.86,3.4-2.66,4.89c-0.68,1.26-4.16,1.16-4.21-1.26C150.6,132.3,155.61,116.99,166.37,117.02z M121.71,117.02 c10.81-0.05,15.63,15.43,15.73,20.03c0.05,2.33-3.05,3.44-4.4,1.11c-0.82-1.41-1.39-2.45-2.47-4.55c-1.55-3.03-5.16-6.06-8.85-6.05 c-3.7,0.01-7.18,3.08-8.76,5.9c-1.24,2.22-2.18,3.19-2.81,4.74c-0.92,2.27-3.92,1.24-3.97-1.26 C106.09,132.32,111,117.06,121.71,117.02z M184.23,169.45c-1.91,8.19-18.66,26.11-40.26,26.03c-21.44-0.07-38.37-17.77-39.87-26.03 c-0.58-3.19,2.81-5.81,5.61-4.84c11.86,4.09,18.31,4.74,34.29,4.74c15.98,0,22.02-1.48,34.32-4.84 C181.52,163.65,184.9,166.55,184.23,169.45z"></path> </svg> <svg width="100" height="100" viewBox="0 0 288 288"> <defs> <filter> <feDropShadow dx="-2" dy="-2" stdDeviation="0" flood-color="#3e68ff"></feDropShadow> <feDropShadow dx="2" dy="-2" stdDeviation="0" flood-color="#3e68ff"></feDropShadow> <feDropShadow dx="2" dy="2" stdDeviation="0" flood-color="#3e68ff"></feDropShadow> <feDropShadow dx="-2" dy="2" stdDeviation="0" flood-color="#3e68ff"></feDropShadow> </filter> </defs> <g filter="url(#shadow)"> <path d="M144.17,77.84c-37.65,0-68.18,30.52-68.18,68.18c0,37.65,30.52,68.18,68.18,68.18 c37.65,0,68.18-30.52,68.18-68.18C212.35,108.37,181.83,77.84,144.17,77.84z M166.37,117.02c10.77,0.03,15.31,15.39,15.58,20.03 c0.15,2.47-2.95,3.15-4.21,1.21c-0.89-1.37-1.44-2.48-2.56-4.65c-1.51-2.93-4.99-6.08-8.71-6.15c-3.72-0.06-7.31,2.95-8.9,5.9 c-1.23,2.28-1.86,3.4-2.66,4.89c-0.68,1.26-4.16,1.16-4.21-1.26C150.6,132.3,155.61,116.99,166.37,117.02z M121.71,117.02 c10.81-0.05,15.63,15.43,15.73,20.03c0.05,2.33-3.05,3.44-4.4,1.11c-0.82-1.41-1.39-2.45-2.47-4.55c-1.55-3.03-5.16-6.06-8.85-6.05 c-3.7,0.01-7.18,3.08-8.76,5.9c-1.24,2.22-2.18,3.19-2.81,4.74c-0.92,2.27-3.92,1.24-3.97-1.26 C106.09,132.32,111,117.06,121.71,117.02z M184.23,169.45c-1.91,8.19-18.66,26.11-40.26,26.03c-21.44-0.07-38.37-17.77-39.87-26.03 c-0.58-3.19,2.81-5.81,5.61-4.84c11.86,4.09,18.31,4.74,34.29,4.74c15.98,0,22.02-1.48,34.32-4.84 C181.52,163.65,184.9,166.55,184.23,169.45z"></path> </g> </svg>

Or, create some javascript function that clones each of the elements within the svg, removing fill/stroke attributes, and wrapping them in a g tag that has fill="none" and stroke attributes set. Then prepend that to the svg.

For the question: How to add border/outline/stroke to SVG elements in webpages with CSS ?

You can do in CSS:

path { outline: 3px solid green; } 

Please note as of 2018 it is supported by chrome and safari, but might not be available across all modern browsers. See example below:

I applied outline via CSS to a <g> group with paths inside. In static it looks good. In dynamic (dragging) I can see periodically these artifacts (to the left)

UPDATE:

• if outline is "solid" - there are no artifacts
• safari mobile doesn't support outline on <g> elements...