The CSS -moz-box-flex Mozilla extension property specifies how a box should grow to fill the box that contains it, in the direction of the containing box's layout. This property can also be applied in HTML.


  • 0 - The box does not grow.
  • >0 - The box grows to fill a proportion of the available space.

HTML example:

<span style="background:transparent; padding:10px; border:thin solid white;">
<span style="-moz-box-flex:1;">TEXT</span>

CSS example:

box.example {

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