1FR

1fr is a unit of measurement in the Metric Web Design system, a set of guidelines for designing responsive websites. It is a fractional unit of the 'fr' unit, which is used to define the width of a component or element in a web layout.

In the Metric system, the 'fr' unit represents a fractional unit of the available space in a grid container. It can be thought of as a variable unit that adapts to the available space, allowing for more flexible and responsive web design.

1fr is equal to one fraction of the total available space in the grid container. It can be used in combination with other units, such as percentages or pixels, to define the width of a component.

For example, if a grid container has a total width of 1000 pixels and is divided into three equal parts, each part would be represented by 1fr. This means that each part would take up one-third of the total width, allowing for a flexible and responsive layout.

The use of 1fr allows for more efficient use of screen space, particularly on smaller devices or window sizes. It also enables designers to create more complex and dynamic layouts, while maintaining the responsiveness and flexibility of the web.

The Metric system and the use of 1fr have become increasingly popular in the field of web design, as they provide a more standardized and efficient way of designing responsive websites.