最佳答案
white-space: nowrap breaks flexbox layout
I have created a responsive layout for an app using Flexbox. The layout calls for a collapsible menu on the left, a block with a header and body in the middle and a toggleable help-pane on the right (there's more to it but that's the basic structure).
The left menu has two states: 180px wide or 80 px wide. The help pane is either hidden, or takes 180px. The middle box takes the rest of the space. Flexbox works like a charm.
The trouble starts when I make a scrolling div using white-space: nowrap. I have a bunch of items that need to be displayed in a horizontal scroller, so I have a list div with the items, set to overflow:auto and white-space: nowrap.
Usually this works like a charm, but now it breaks my flex layout. Instead of taking the width of the parent (flex) div, the scroller makes the div wider, which in turn pushes the help-pane out of bounds.
The following fiddle illustrates this issue:
http://jsfiddle.net/PieBie/6y291fud/
You can toggle the help-pane by clicking toggle help in the menu bar. Recreate the issue by clicking list whitespace toggle in the menu, this toggles the white-space: no-wrap CSS property of the list. If the help-pane is open, you can see it gets pushed out of bounds.
The bottom list is what I want to achieve, but I want it to be full width of its parent.
I can recreate the issue in Chrome, Firefox, Opera, Vivaldi and Edge. Internet Explorer 11 plays nice (°_°). I would prefer a pure CSS solution (SCSS is also an option), but if need be I can use JS.
$('#nav-toggle').on('click',function(){
$(this).parent().toggleClass('collapsed');
});
$('#help-toggle').on('click',function(){
$('#help-pane').toggleClass('visible');
});
$('#list-toggle').on('click',function(){
$('#list').toggleClass('nowrap');
});body,html{width:100%;height:100%;overflow:hidden;}
#body{
display:flex;
flex-flow:row nowrap;
position:absolute;
top:0;
left:0;
margin:0;
padding:0;
width:100%;
height:100%;
background-color:#abc;
overflow:hidden;
}
#shell{
flex: 1 1 auto;
display:flex;
flex-flow:row nowrap;
position:relative;
width:100%;
min-height:100%;
}
#left{
flex: 0 0 180px;
min-height:100%;
min-width: 0;
background:lightblue;
}
#left.collapsed{
flex: 0 0 80px;
}
#mid{
flex: 1 1 auto;
min-height:100%;
min-width: 0;
display:flex;
flex-flow:column nowrap;
align-items:stretch;
align-content:stretch;
position:relative;
width:100%;
min-height:100vh;
min-width: 0;
background:purple;
}
#mid-top{
flex: 0 0 auto;
min-height:100px;
background:green;
}
#mid-bottom{
min-height:calc(100% - 100px);
flex: 1 1 auto;
background:lightgreen;
}
#list{
overflow: auto;
width: 100%;
max-width: 100%;
}
#list.nowrap{
white-space: nowrap;
}
#secondlist{
overflow: auto;
max-width: 250px;
white-space: nowrap;
}
.list-item{
display: inline-block;
width: 50px;
height: 50px;
margin: 2px;
background: purple;
}
.list-item.odd{
background: violet;
}
#help-pane{
display:none;
flex: 0 0 0px;
background:red;
}
#help-pane.visible{
display:inherit;
flex:0 0 180px;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="body">
<div id="shell">
<div id="left">
<div id="nav">
- menu -
</div>
<div id="help-toggle">
help toggle
</div>
<div id="nav-toggle">
nav toggle
</div>
<div id="list-toggle">
list whitespace toggle
</div>
</div>
<div id="mid">
<div id="mid-top">
- mid top -
</div>
<div id="mid-bottom">
- mid bottom- <br><br>
<div id="list">
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
</div>
<hr>
<div id="secondlist">
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
<div class="list-item"> </div>
<div class="list-item odd"> </div>
</div>
</div>
</div>
</div>
<div id="help-pane" class="visible">
- help-pane -
</div>
</div>