CSS 'border-image-outset' Property Explained

The CSS 'border-image-outset' property specifies the amount by which the border image area extends beyond the border box. It determines the space between the border image and the element's content, allowing for finer control over the visual impact and placement of border images in relation to the element's layout.

CSS 'border-image-outset' Property Examples

See the Pen CSS 'border-image-outset' Property Explained by Webzstore (@webzstore) on CodePen.

The 'border-image-outset' property enhances the capabilities of CSS for decorative border styling, allowing designers to achieve precise visual effects by controlling how far a border image extends beyond the element's border box. This property supports creative and flexible design approaches, enabling the creation of visually rich and detailed layouts.

Browser Support For 'border-image-outset' Property

15.0	6.0	15.0	11.0	15.0

CSS Syntax of the 'border-image-outset' Property

border-image-outset: length | number | initial | inherit;

• A single value applies to all four sides.
• Two values set the top and bottom first, then the left and right.
• Three values are set at the top, left and right, and then the bottom.
• Four values set the top, right, bottom, and left, respectively.

Usage of the 'border-image-outset' Property

Use 'border-image-outset' when you need to adjust the positioning of a border image relative to the element's border box. This property is beneficial for creating visual effects where the border image needs to overlap or extend beyond the normal bounds of the element, such as creating shadows, frames, or decorative accents that enhance the element's appearance without affecting its content layout.

Property Values of the 'border-image-outset' Property

• Length: Specifies the outset using length units (e.g., px, em).
• Number: An <number> value that is multiplied by the corresponding border-width to determine the outset distance.
• Initial: Resets the 'border-image-outset' to its default value (0).
• Inherit: Inherits the 'border-image-outset' from the parent element.

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