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HTML 

              
                <h1>How does stroke-dasharray work</h1>
<p>stroke-dasharray only works on SVG elements. It is a bit confusing because you can apply it using CSS, but that CSS rule will only affect SVG elements.</p>
<p>Let's make an svg box that is 100 by 100 so 400 length perimeter, and apply <pre>
  stroke-dasharray: 10;
</pre></p>

	<svg width="100" height="100" class="strokeTest">
		<rect width="100" height="100" x="0" y="0" />
	</svg>

<p></p>

<a href="https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/stroke-dasharray">If you read the docs</a> stroke-dasharray: "specify the lengths of alternating dashes and gaps. If an odd number of values is provided, then the list of values is repeated to yield an even number of values.</p>

<p>So a pair of numbers specifics the length of a dash, and a gap. This then gets repeated all the way around the shape.</p>

<p>Important, these lengths are relative to the SVG, viewports can change this etc</p>

<p>Play with the CSS. Notice that 
<pre>
  stroke-dasharray: 10;
</pre>
  and
<pre>
  stroke-dasharray: 10 10;
</pre>
are the same effect because if you have an odd number of lengths, they get doubled.
</p>

<p>You could set a specific length for each dash and gap around a whole shape if you wanted to.</p>

<p>Let's make a second shape and give it increasingly larger dashes, and gaps using
  <pre>
stroke-dasharray: 10 20 30 40 50 60;
</pre>
</p>

	<svg width="100" height="100" class="strokeTestExtended">
		<rect width="100" height="100" x="0" y="0" />
	</svg>

<p>Notice how the pattern wraps around and hits the end before it can finish the second time. This is becase 10+20+30+40+50+60 = 210, while the perimeter of the square is only 400, so the last 20 is cut off.</p>

<!-- twitter -->
<a class="twitter" target="_top" href="https://twitter.com/joshdance">  <svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" viewBox="0 0 72 72"><path d="M67.812 16.141a26.246 26.246 0 0 1-7.519 2.06 13.134 13.134 0 0 0 5.756-7.244 26.127 26.127 0 0 1-8.313 3.176A13.075 13.075 0 0 0 48.182 10c-7.229 0-13.092 5.861-13.092 13.093 0 1.026.118 2.021.338 2.981-10.885-.548-20.528-5.757-26.987-13.679a13.048 13.048 0 0 0-1.771 6.581c0 4.542 2.312 8.551 5.824 10.898a13.048 13.048 0 0 1-5.93-1.638c-.002.055-.002.11-.002.162 0 6.345 4.513 11.638 10.504 12.84a13.177 13.177 0 0 1-3.449.457c-.846 0-1.667-.078-2.465-.231 1.667 5.2 6.499 8.986 12.23 9.09a26.276 26.276 0 0 1-16.26 5.606A26.21 26.21 0 0 1 4 55.976a37.036 37.036 0 0 0 20.067 5.882c24.083 0 37.251-19.949 37.251-37.249 0-.566-.014-1.134-.039-1.694a26.597 26.597 0 0 0 6.533-6.774z"></path>
  </svg>
</a>
!

CSS 

              
                * {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
}

.strokeTest {
  stroke-width: 3;
  stroke: red;
  overflow: visible;
  width: 100px;
  height: 100px;
  stroke-dasharray: 25;
  stroke-dashoffset: 10;
}

.strokeTestExtended {
  stroke-width: 3;
  stroke: red;
  overflow: visible;
  width: 100px;
  height: 100px;
  stroke-dasharray: 10 20 30 40 50 60;
}


/* csss for twitter icon in corner */
.twitter {
  position: fixed;
  display: block;
  right: 12px;
  bottom: 12px;
}

.twitter svg {
  width: 32px;
  height: 32px;
  fill: rgb(66, 239, 255);
  border: none;
}
!

JS
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999px

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