HTML5 / CSS3 Circle with Partial Border

html css border css-shapes
knpwrs picture knpwrs · Oct 25, 2012 · Viewed 61k times · Source

Is it possible to create a circle using only HTML5 / CSS3 which has a border that only goes part way around the circle? If not, what techniques can I use to accomplish this effect? I would prefer to use pure DOM elements, but if I have to I can draw on canvas or spin up an SVG.

Answer

Ana picture Ana · Oct 25, 2012

Yes, it is possible - see this:

demo

.circle {
  position: relative;
  margin: 7em auto;
  width: 16em;
  height: 16em;
  border-radius: 50%;
  background: lightblue;
}

.arc {
  overflow: hidden;
  position: absolute;
  /* make sure top & left values are - the width of the border */
  /* the bottom right corner is the centre of the parent circle */
  top: -1em;
  right: 50%;
  bottom: 50%;
  left: -1em;
  /* the transform origin is the bottom right corner */
  transform-origin: 100% 100%;
  /* rotate by any angle */
  /* the skew angle is 90deg - the angle you want for the arc */
  transform: rotate(45deg) skewX(30deg);
}

.arc:before {
  box-sizing: border-box;
  display: block;
  border: solid 1em navy;
  width: 200%;
  height: 200%;
  border-radius: 50%;
  transform: skewX(-30deg);
  content: '';
}
<div class='circle'>
  <div class='arc'></div>
</div>

Related questions

Placing border inside of div and not on its edge

I have a <div> element and I want to put a border on it. I know I can write style="border: 1px solid black", but this adds 2px to either side of the div, which is not what …

Read More
How to set a border for an HTML div tag

I am trying to define a border around a div tag in HTML. In some browsers the border does not appear. Here is my HTML code: How do I set a border for an HTML div tag?

Read More
How to increase space between dotted border dots

I am using dotted style border in my box like .box { width: 300px; height: 200px; border: dotted 1px #f00; float: left; } I want to the increase the space between each dot of the border.

Read More