How Can I Customize Dashed Border Stroke Length and Spacing in CSS?

Customizing Dashed Border Stroke Length and Spacing in CSS

Limitations of Native Border Property

CSS's native border property provides limited control over dashed borders, lacking the ability to adjust stroke length and spacing.

Introducing border-image

To gain greater flexibility, harness the power of the border-image property. This technique simulates dashed borders using images, offering fine-grained control over their appearance.

Step-by-Step Guide

1. Create the Image: Design and export an image representing the desired stroke pattern. Ensure transparency for allowing background display. Adjust widths and gaps within the image to control stroke properties.

2. CSS Setup:

   • Set border-image-source: Specify the URL to the image created in Step 1.
   • Optional: border-image-width: Define the border's width in pixels, percentage, or multiple of the stroke width (default: 1).
   • Set border-image-slice: Define the thickness of the image's four sides used as the border.
   • Set border-image-repeat: Specify how the image is repeated (e.g., round, repeat).

Complete Example

.bordered {
  border: dashed 4px #000; /* Fallback for non-supporting browsers */
  border-style: dashed;
  border-image: url("https://i.sstatic.net/wLdVc.png") 2 round;
}

Controlling Gaps and Stroke Length

To modify the gaps and stroke lengths, simply edit the image in Photoshop or a similar tool and adjust the width of the gaps and strokes within it. For wider gaps, create an image where the gaps are larger.

Browser Compatibility

border-image is well-supported in modern browsers (IE 11 and up), offering a consistent appearance across browsers.

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