lineheightominaisuudella

The line-height property in CSS is used to specify the amount of space between lines of text within an element. It affects the vertical spacing of the text content, influencing readability and visual design. The value of line-height can be set using various units, including pixels, ems, rems, percentages, or a unitless number.

When a unitless number is used, such as line-height: 1.5;, it acts as a multiplier of the font-size. This is often considered the most flexible and maintainable approach, as it scales proportionally with changes in font size. For instance, if a font-size is 16px and the line-height is set to 1.5, the actual line height will be 24px (16px * 1.5).

Using pixels, like line-height: 24px;, sets a fixed amount of space between lines, which does not adapt if the font size changes. Percentages, such as line-height: 150%;, also function as a multiplier of the font-size, similar to unitless numbers, but they are relative to the parent element's font size if inherited.

A larger line-height generally improves readability by providing more white space between lines, making it easier for the eye to track from the end of one line to the beginning of the next. Conversely, a smaller line-height can make text appear cramped and harder to read. The default line-height in most browsers is typically around 1.2, offering a basic level of readability. Developers carefully adjust line-height to achieve desired typographic aesthetics and enhance the user experience.