Use the border attribute to set the dashed style to quickly create dashed lines, such as border-top: 2px dashed #000; 2. You can customize the appearance of the dashed lines by adjusting the border width, color, and style; 3. When applying the dashed lines to dividers or inline elements, it is recommended to set height: 0 or reset the default style of hr; 4. If you need to precisely control the length and spacing of the dashed lines, you should use background-image to work with linear-gradient, such as background: linear-gradient(to right, black 33%, transparent 33%) repeat-x. In short, it is recommended to use border for conventional dotted lines, and the linear-gradient method is used for fine control.
Creating a dashed line with CSS is simple and commonly used for styling borders, dividers, or decorative elements. Here's how you can do it effectively.

Use the border
property with dashed
style
The easiest way to create a dashed line is by using the CSS border
property and setting the border style to dashed
.
.dashed-line { border-top: 2px dashed #000; width: 100%; height: 0; }
This creates a horizontal dashed line using the top border of an element. Setting height: 0
ensures only the border is visible.

Alternatively, you can apply dashed borders to any side:
.dashed-line { border-bottom: 3px dashed red; }
Customize the dash appearance
While CSS doesn't let you directly control the length or spacing of dashes like in SVG, you can adjust:

- Thickness (via border width)
- Color
- Style (
dashed
,dotted
,solid
, etc.)
Example with thicker, blue dashes:
.blue-dashed { border-top: 4px dashed blue; width: 80%; margin: 20px auto; }
Use on inline elements or dividers
You can also create a dashed line using a<hr />
or <div>
:
<div class="dashed-divider"></div>
.dashed-divider { border-top: 1px dashed #ccc; margin: 20px 0; }
Or style a horizontal rule:
hr { border: none; border-top: 2px dashed #999; margin: 20px 0; }
Note: Always set
border: none
first if you're customizing an<hr />
, since it has default styles in browsers.
For more control: Use background-image
with linear-gradient
If you need precision control over dash length and spacing, use a gradient:
.custom-dashed { height: 2px; background: linear-gradient(to right, black 33%, transparent 33%) repeat-x; background-size: 6px 2px; width: 100%; }
This creates a dashed line where each dash is 33% of a 6px repeat pattern — so 2px dash, 4px gap. Adjust the percentages and sizes as needed.
Basically, for most cases, border: dashed
is the quickest and cleanest method. For fine-tuned patterns, go with background-image
and linear-gradient
.
The above is the detailed content of How to create a dashed line with CSS?. For more information, please follow other related articles on the PHP Chinese website!

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