Learn D3.js

Styling

In the previous example, the domain line didn't appear because it was removed:

d3.select(".domain").remove();

But you could have also simply hidden it using the opacity property in CSS:

.domain { opacity: 0 }

You can apply any property you wish to style the domain. Some of the preceding examples showed a thicker domain line and were created by changing the stroke-width property, such as in the axis shown in the following screenshot, which also removed the outer ticks with the tickSizeOuter(0) axis configuration method:

Styling a domain using CSS and tick configuration methods. Code: Axes/12-domain-styling.html.

Ticks can be selected ...