What Does `flex: 1` Mean in CSS Flexbox?

Understanding the Flexbox Property: What Does "flex: 1" Represent?

The flex property, a convenient shorthand for flex-grow, flex-shrink, and flex-basis, allows for flexible layout control. While the default value is "0 1 auto," it's common to encounter "flex: 1" in practice.

This raises the question: what does "flex: 1" truly mean? Is it interpreted as "1 1 auto" or "1 0 auto"?

To clarify, "flex: 1" represents the following:

• flex-grow: 1

  • The associated div will expand proportionately with the window's size.

• flex-shrink: 1

  • The div will contract proportionately to the window's size.

• flex-basis: 0

  • The div lacks an explicit starting value and will occupy screen space based on the available proportion.
  • For example, if three divs are contained within a wrapper, each will claim approximately 33% of the screen width.

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