Make 2 columns the same height with flexbox

Question

Hello I want to make my 2 columns the same height (with a min-height of 100vh)

<div class="wrapper">
    <div class="col">... little content... </div>
    <div class="col">...more content... </div>
</div>

my CSS is

.wrapper {
    display: flex;
    height: 100vh;
}

.col {
    outline: 1px #000 solid;
}

this works fine but if the second (or first) column height larger than 100vh the other column will be shorter and will not expand to the same height as the larger one.

Answer 1

Update answer: As I understand, what you want is the height of 100vh for the .wrapper , which has 2 columns inside it. And everywhen one of each column getting too long (longer than 100vh), its behavior becomes scroll instead of make its parent scroll. Here's the code after refining, give it a look to see if that's what you want. What I do are:

• .wrapper has a specific height of 100vh
• each column inside .wrapper has the max-height: 100%
• When the column's content height getting longer than .wrapper 's height, its behavior becomes scroll, by overflow-y: auto .

You can read more about overflow at here to see what's the difference between overflow: auto , overflow: scroll and overflow: visible (default), which I have struggled while seeking for this answer).

 body { margin: 0; padding: 0; } .wrapper { display: flex; height: 100vh; } .col { outline: 1px green solid; max-height: 100%; overflow-y: auto; width: 120px; }

 <div class="wrapper"> <div class="col">... little content... </div> <div class="col">..Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.... </div> </div>

Answer 2

 .wrapper { display: flex; flex-direction: row; } .col { outline: 1px #000 solid; display: flex; flex: 1; min-height: 100vh; }

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Answer 3

if you want to auto split use flex: 1 , so it will equal place, without any issue

 .wrapper { display: flex; min-height: 100vh; } .col { display: flex; align-items: center; justify-content: center; text-align: center; flex: 1; flex-direction: column; background: grey; } .col:nth-child(2) { background: yellow }

 <div class="wrapper"> <div class="col">... little content... </div> <div class="col">...more content... </div> </div>

Note Learn more about Flex!