CSS tab-size Property
Sets the width of tab characters in elements with preserved whitespace
Syntax
tab-size: <integer> | <length>;Values
| Value | Description |
|---|---|
| 8 | Default tab size of 8 spaces |
| 4 | Common preference for code |
| 2 | Narrow tab stops |
| <length> | Fixed tab width |
Example
pre, code {
tab-size: 4;
-moz-tab-size: 4;
}Understanding CSS tab-size
The CSS tab-size property sets the width of tab characters in elements with preserved whitespace. As part of the Typography module in CSS, it is one of the most commonly used properties for controlling the visual presentation of web pages.
You can set tab-size to values such as 8, 4, 2, <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 tab-size property include responsive web design, component-based layouts, and creating visually consistent interfaces across devices. It works closely with related properties like white-space, font-family, letter-spacing to achieve complex styling effects. Understanding how these properties interact helps you write cleaner, more maintainable stylesheets.
Browser support for tab-size 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.tabSize or the CSS custom properties (variables) approach for theming.
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