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With flexbox you can make flex items grow or shrink in relation to other flex items and the available space inside the flex container.
Resources
Video review
- The
flex-growproperty applies to flex items only. -
flex-growdetermines how much of the available space inside the flex container an item should take up; it assigns more or less space to flex items. - A
flex-growvalue of1expands flex items to take up the full space of a line. - The higher the
flex-growvalue, the more an item grows relative to the other items.
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With flexbox you can make flex items grow
or shrink in relation to the other flex
0:00
items and the available space
inside the flex container.
0:05
For example,
I can expand the flex items so
0:09
that they fill up
the entire flex container.
0:12
Then I can expand the first, second,
0:15
or any flex item to take up
more space in the container.
0:17
The flex-grow property determines
how much of the available space
0:21
inside the flex-container
an item should take up.
0:25
So, it assigns more or
less space to flex items.
0:28
By default, flex items in a flex container
do not take up the full space of a line.
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But, you can expand the flex items so
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that they fill up the entire line
using the flex-grow property.
0:41
Back in my workspace,
inside flexbox.css, I'm going to target
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all the flex items by creating a new
rule that targets the class item.
0:51
Then I'm going to give
them a flex-grow property.
0:58
The default value for flex-grow is zero.
1:02
The flexed items do not expand.
1:06
So watch what happens when I
set their flex-grow value to 1.
1:09
Now all the items have the same
size in the container.
1:17
The flex items expand to take
up the full space of a line.
1:21
Even as the flex container gets narrower,
the flex items adjust to the width.
1:25
When the flex container can no longer
distribute an equal amount of space on one
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line, It breaks items on to a second line
where it also gives the items equal space.
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So notice how item six expands to take up
the full space of the second line and once
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item five moves down to the second line
they each take up half the line and so on.
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So this is a handy feature for
building responsive layouts.
1:58
For instance, you can display a certain
number of equal width columns on one row
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on wide desktop screens.
2:07
Then on smaller screens where
the row will be much narrower,
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some of the columns appear on a second or
third line.
2:13
The higher the flex grow value, the more
an item grows relative to the other items.
2:17
So, for instance,
if I go back to the style sheet and
2:21
if I create a new rule
that targets item-3,
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and give it a flex-grow value of two.
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So for every bit of space the other
flex items get on one line,
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Item 3 will always get twice
as much of that space.
2:39
And if I go back to the item-3 rule and
change the flex-grow value to 3,
2:44
this will give it three times
the amount of space. So again,
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this is great for
building flexible columns.
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Say I'm creating a two column layout.
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So for instance,
I'll go over to my HTML file and
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comment out all but items one and two.
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So this for example can be a main
content column and a sidebar.
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So now I can go back to my style sheet and
give the main column a larger flex-grow
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so I'll target item-1 and set
its flex-grow to four.
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This way it will always take
up four times as much space
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as the sidebar. The flex-grow
property applies to flex items only.
3:31
If you apply flex-grow to a flex
container, it will have no effect on it.
3:37
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