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Proper use of flex properties when nesting flex containers
A flex container is always the parent and a flex item is always the child. The scope of a flex formatting context is limited to a parent/child relationship.
Descendants of a flex container beyond the children are not part of flex layout and will not accept flex properties. There are certain flex properties that apply only to flex containers ?
- justify-content,
- flex-wrap and
- flex-direction
There are certain flex properties that apply only to flex items"
- align-self
- flex-grow
- flex
Always apply display: flex or display: inline-flex to a parent in order to apply flex properties to the child.
Let us now see an example. We have two divs inside our parent div parentBox ?
<div class='parentBox'> <div class='childBox'> <div class='babyChildBox'>Parent's Child</div> <div class='babyChildBox'>Parent's Child</div> </div> <! - - - !--> </div>
The style for the parent container. We have use the CSS Flex shorthand property ?
.parentBox { display: flex; flex: 1 0 100%; background-color:yellow; border: 3px solid skyblue; } For the Child i.e. childBox, we have again used the shorthand property to set the flexible length on flexible items ?
.childBox { flex: 1 1 50% background-color: green; color: white; border: 1px solid blue; } The nested child in the above .childBox is set with Flex. This and the above nests the flex containers ?
.babyChildBox { flex: 1 1 50%; background-color: orange; } Example
Let us now see the complete example to nest the flex containers properly ?
<!DOCTYPE html> <html> <head> <style> .parentBox { display: flex; flex: 1 0 100%; background-color:yellow; border: 3px solid skyblue; } .childBox { flex: 1 1 50% background-color: green; color: white; border: 1px solid blue; } .babyChildBox { flex: 1 1 50%; background-color: orange; } </style> </head> <body> <h1>Implementing Flex</h1> <div class='parentBox'> <div class='childBox'> <div class='babyChildBox'>Parent's Child</div> <div class='babyChildBox'>Parent's Child</div> </div> <div class='childBox'> <div class='babyChildBox'>Parent's Child</div> <div class='babyChildBox'>Parent's Child</div> </div> </div> </body> </html> Output
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