IE 11 flexbox child width not respecting content (Safari too)

Instead of flex: 1 use flex-grow: 1; flex-basis: 0; or specify all 3 values that you want for the shorthand. And if you specify flex-basis make sure you specify a unit. https://jsbin.com/ketolifuhu/edit?html,css,output

Here's a good article that covers some of the bugs and inconsistencies https://philipwalton.com/articles/normalizing-cross-browser-flexbox-bugs/

:root {
    --dark-primary-color: #303F9F;
    --default-primary-color: #3F51B5;
    --light-primary-color: #C5CAE9;
    --text-primary-color: #FFFFFF;
    --accent-color: #FF4081;
    --primary-text-color: #212121;
    --secondary-text-color: #757575;
    --divider-color: #BDBDBD;
    --box-size: 150px;
    font-family: Roboto, 'sans-serif';
    font-size: 20px;
    letter-spacing: 1.25px;
    font-weight: 100;
    color: white;
}

body {
  background-color: #BDBDBD;
}

.flex-container {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
}

.flex-container > div {
  flex-grow: 1;
  margin: 10px;
  box-shadow: 2px 2px 6px 1px rgba(0,0,0,.2);
  padding: 30px;
  flex-basis: 0;
}

.left {
  background-color: #3F51B5;
}

.right {
  background-color: #3F51B5;
}

.heading {
  letter-spacing: .5px;
  font-weight: 400;
  white-space: nowrap;
}

.sub-text {
  margin-top: 20px;
  font-size: 14px;
}
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <link href="https://fonts.googleapis.com/css?family=Roboto:100,400" rel="stylesheet">
  <title>JS Bin</title>
</head>
<body>

  <div class="flex-container">
    
    <div class="left">
      <div class="heading">Here is a heading that shouldn't wrap</div>
      <div class="sub-text">This is just some content that should wrap just fine and I don't really care what it says, but it'll just wrap just fine and that behavior should be handled by the heading.</div>
    </div>
    <div class="right">
      <div class="heading">Here is a heading that shouldn't wrap</div>
      <div class="sub-text">This is just some content that should wrap just fine and I don't really care what it says, but it'll just wrap just fine and that behavior should be handled by the heading.</div>
    </div>
    
  </div>
  
  
</body>
</html>

(Vote me up, vote me down... but I am just saying, what helped me ¯_(ツ)_/¯)

Changing the flex-property on the child element from

flex: auto

to:

flex: 100%   (or  1 1 100%, if you prefer)

solved the thing for me.

Issue only existed under IE11 by the way, not under Edge.


You should avoid using flex: 1 shorthand as some older versions of browsers have different default values for it, which will create issues for you.

A lot of others have mentioned specifying flex-basis, but you need to specify the unit. I.e. don't write flex-basis: 0, write flex-basis: 0% or flex-basis: 0px, otherwise some browsers won't know how to handle the 0 value.

Now to the main point, to avoid overflow I usually just set max-width: 100% on the flex-child. If the flex-child has padding, for instance padding-left: 10px; padding-right:10px; then set max-width to 100% minus the padding! i.e...

padding: 0 10px;
max-width: calc(100% - 20px);

Now if you do these steps and remove the white-space: nowrap then you'll be rid of the bugs.

Tags:

Html

Css

Internet Explorer

Overflow

Flexbox

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