CSS3 - Flex wrap not working on IOS 10.1.1 Safari & Chrome

Question

I'm trying to use flex wrap and min-width: 50% to dynamic grid layout where single cells occupy all width. The problem is that it's not working correctly in iOS 10.1.1 (iPhone 5c) Safari and Chrome - the display is not grid-like, but a horizontal layout. In desktop Chrome (Ubuntu) and Android Chrome is working fine.

Jsfiddle demo: https://jsfiddle.net/9dscc1Lq/

Code:

<style>

body {
    width: 300px;
}

.tabs {
    width: 100%;
    display: flex;
    display: -webkit-flex;
    flex-wrap: wrap;
    -webkit-flex-wrap: wrap;
    flex: 0 0 auto;
    -webkit-flex: 0 0 auto;
    box-sizing: border-box;
    flex-flow: row wrap;
    -webkit-flex-flow: row wrap;
}

.tab {
    border: 1px solid #3A3A3A;
    color: #929292;
    min-width: 50%;
    box-sizing: border-box;
    flex: 1 1 0;
    -webkit-flex: 1 1 0;
    text-align: center;
}

</style>

<div class="tabs">
    <div class="gwt-HTML tab">1</div>
    <div class="gwt-HTML tab">2</div>
    <div class="gwt-HTML tab">3</div>
    <div class="gwt-HTML tab">4</div>
    <div class="gwt-HTML tab">5</div>
</div>

Expected layout (correct):

iOS behavior (incorrect):

Please advise!

Answer 1

min-width doesn't work as intended on iOS, use flex-basis like this flex: 1 1 50%;

Src: https://bugs.webkit.org/show_bug.cgi?id=136041

Also, when using prefixed properties, you should always put them before the unprefixed version.

.tabs {
  width: 100%;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  box-sizing: border-box;
}
.tab {
  border: 1px solid #3A3A3A;
  color: #929292;
  box-sizing: border-box;
  -webkit-flex: 1 1 50%;
  flex: 1 1 50%;
  text-align: center;
}

<div class="tabs">
  <div class="gwt-HTML tab">1</div>
  <div class="gwt-HTML tab">2</div>
  <div class="gwt-HTML tab">3</div>
  <div class="gwt-HTML tab">4</div>
  <div class="gwt-HTML tab">5</div>
</div>