What Does 'flex: 1' Really Mean in CSS?

Deciphering the Meaning of "flex: 1" in CSS

The flex property offers a comprehensive shorthand notation for controlling an element's sizing behavior within a flexible box layout. By default, it sets flex-grow to 0, flex-shrink to 1, and flex-basis to auto. However, the use of "flex: 1" has raised questions regarding its interpretation.

Unveiling the Shorthand's Significance

When applied to an element, "flex: 1" translates to the following specific settings:

• flex-grow: 1: This indicates that the element will expand proportionally to the available space when the parent container increases in size.
• flex-shrink: 1: This specifies that the element will shrink proportionally to the available space when the parent container decreases in size.
• flex-basis: 0: This signifies that the element has no predefined size and will occupy the available space based on the other flex items and the container's size.

In essence, "flex: 1" embodies the concept of equally expanding and contracting an element within its parent container. It is a convenient shorthand notation that simplifies the control of an element's resizing behavior, ensuring responsive and adaptable layouts.

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