What is the best way to ensure that a div within a flexbox column item is 100% in

Question

What is the best way to ensure that a div within a flexbox column item is 100% in

I am struggling to make a div inside a flex box item take up 100% height. Here is the current setup:

#outer (display: fled, flex-direction: column, height: 100px)
  #header (height: auto)
  #middle (flex-grow: 1)
    #inner (height: 100%)

The goal is for #inner to occupy the full remaining height of #outer. Essentially, I want the red section to completely cover the green section in the example below.

#outer {
  height: 100px;
  display: flex;
  flex-direction: column;
}

#header {
  height: auto;
}

#middle {
  flex-grow: 1;
  background-color: green;
}

#inner {
  height: 100%;
  background-color: red;
}

<div id="outer">
  <div id="header">
    Header
  </div>
  <div id="middle">
    <div id="inner">
      This should be full height.
    </div>
  </div>
</div>

Browser rendering varies with Firefox and IE showing the desired layout while Chrome behaves differently. In Chrome, it seems as if #inner has height: auto.

How can I resolve this issue to work uniformly across all browsers, especially in Chrome without compromising on using flexbox?

html css flexbox height

Answer 1

Answer №1

To ensure compatibility with Chrome, simply add flex-shrink: 1 to the CSS for #middle, or opt for the shorthand flex: 1.

#outer {
  height: 100px;
  display: flex;
  flex-direction: column;
}

#header {
  height: auto;
}

#middle {
  flex: 1;
  background-color: green;
}

#inner {
  height: 100%;
  background-color: red;
}

<div id="outer">
  <div id="header">
    Header
  </div>
  <div id="middle">
    <div id="inner">
      This should be full height.
    </div>
  </div>
</div>

Answer 2

To ensure compatibility with Chrome, simply add flex-shrink: 1 to the CSS for #middle, or opt for the shorthand flex: 1.

#outer {
  height: 100px;
  display: flex;
  flex-direction: column;
}

#header {
  height: auto;
}

#middle {
  flex: 1;
  background-color: green;
}

#inner {
  height: 100%;
  background-color: red;
}

<div id="outer">
  <div id="header">
    Header
  </div>
  <div id="middle">
    <div id="inner">
      This should be full height.
    </div>
  </div>
</div>

Answer 3

Answer №2

To optimize your layout, try nesting Flexboxes in a way that makes your #middle element a flex container with flex-direction: column, and ensure that the #inner element has flex: 1 to allow it to grow.

#outer {
  height: 100px;
  display: flex;
  flex-direction: column;
}

#header {
  height: auto;
}

#middle {
  flex-grow: 1;
  background-color: green;
  display: flex;
  flex-direction: column;
}

#inner {
  height: 100%;
  background-color: red;
  display: block;
  flex: 1;
}

I found success using this approach: https://jsfiddle.net/yw6kpa1x/

Answer 4

To optimize your layout, try nesting Flexboxes in a way that makes your #middle element a flex container with flex-direction: column, and ensure that the #inner element has flex: 1 to allow it to grow.

#outer {
  height: 100px;
  display: flex;
  flex-direction: column;
}

#header {
  height: auto;
}

#middle {
  flex-grow: 1;
  background-color: green;
  display: flex;
  flex-direction: column;
}

#inner {
  height: 100%;
  background-color: red;
  display: block;
  flex: 1;
}

I found success using this approach: https://jsfiddle.net/yw6kpa1x/

Answer 5

Answer №3

Perhaps this is the solution you've been searching for?

#container {
  height: 100px;
  display: flex;
  flex-direction: column;
}

#top {
  height: auto;
}

#middle-section {
  display: flex;
  flex-grow: 1;
  background-color: green;
}

#bottom {
 
  background-color: red;
}

<div id="container">
  <div id="top">
    Top Section
  </div>
  <div id="middle-section">
    <div id="bottom">
      This content should take up the full height.
    </div>
  </div>
</div>

Answer 6

Perhaps this is the solution you've been searching for?

#container {
  height: 100px;
  display: flex;
  flex-direction: column;
}

#top {
  height: auto;
}

#middle-section {
  display: flex;
  flex-grow: 1;
  background-color: green;
}

#bottom {
 
  background-color: red;
}

<div id="container">
  <div id="top">
    Top Section
  </div>
  <div id="middle-section">
    <div id="bottom">
      This content should take up the full height.
    </div>
  </div>
</div>

What is the best way to ensure that a div within a flexbox column item is 100% in

Answer №1

Answer №2

Answer №3

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