CSS outline-width Property
Sets the width of the outline around an element
Syntax
outline-width: thin | medium | thick | <length>;Values
| Value | Description |
|---|---|
| medium | Default outline width |
| thin | Thin outline |
| thick | Thick outline |
| <length> | Specific width |
Example
.focused {
outline-width: 2px;
outline-style: solid;
}Understanding CSS outline-width
The CSS outline-width property sets the width of the outline around an element. As part of the Box Model module in CSS, it is one of the most commonly used properties for controlling the visual presentation of web pages.
You can set outline-width to values such as medium, thin, thick, <length>, among others. Each value changes how the browser renders the affected element, giving you fine-grained control over your page layout and design. Choosing the right value depends on the specific design requirements of your project.
Common use cases for the outline-width property include responsive web design, component-based layouts, and creating visually consistent interfaces across devices. It works closely with related properties like outline, outline-style, outline-color to achieve complex styling effects. Understanding how these properties interact helps you write cleaner, more maintainable stylesheets.
Browser support for outline-width is excellent across all modern browsers including Chrome, Firefox, Safari, and Edge. For older browsers, consider using fallback values or progressive enhancement strategies. The property can also be set dynamically via JavaScript using element.style.outlineWidth or the CSS custom properties (variables) approach for theming.
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