How to reset 'display' property for flex-item

Question

I'm trying to convert old layout based on tables and JS to the new Flexbox with backward compatibility by keeping the tables for old browsers (specifically IE8, IE9 and Opera 10+).

The problem is that there is no display:flex-item to override the old style of display:table-cell.

I've tried various definitions like display:inherit, display:initial but none is able to reset the display definition to work correctly as flex-item.

<!-- HTML user list -->
<div class="userDetails layout">
    <div class="picture"><img src="..."></div>
    <div class="details">username, email, etc.</div>
</div>

/* CSS Table Layout */
.layout { display: table; width: 100%; }
.layout > .picture { display: table-cell; width: 30%; }
.layout > .details { display: table-cell; width: auto; }

/* CSS Flexbox - ignored by browsers that does not support it */
/* just an example - should use all versions for best compatibility */
.layout { display: flex; }
.layout > .picture { display: ???; flex: 0 1 30%; }
.layout > .details { display: ???; flex: 1 1 auto; }

Whatever I set in display for the .details it does not work as flex-item and does not grow to fill the remaining space.

Any idea how to override this without using JS to detect browser version and switch the styles?

I've tried googling for solution but most of the results are just general articles about Flexbox; only similar is this test which simply does not solve the backward compatility.

UPDATE 1: This is a JSFiddle demo of a pure Flexbox and Flexbox combined with table layout. If you resize the result window, the pure layout shrinks differently than the bottom one that combine table and Flexbox. Note: in Chrome this works correctly, try it in Firefox, IE, Safari, etc.

UPDATE 2: Safari works correctly with prefixed definitions... updated JSFiddle demo

Answer 1

As Danield has mentioned, all children of a flex container (designated by display: flex or display: inline-flex) are automatically made flex items. There is no display property for a flex item; instead, you set it to some other value depending on how you want the children of the flex item to be laid out. If browsers are recognizing display: flex-item, then they probably have some weird non-standard implementation of "flexbox", because that value has never existed in any incarnation of the Flexbox spec (and I have no idea what exactly it would correspond to if it did).

The initial value of display is inline, so display: initial is equivalent to display: inline. See this answer. What you're trying to do is reset the elements to whatever their default display is as given by browsers. You will need to know this value in advance; for div elements it's display: block.

Unfortunately, this will override the existing table-cell declaration in all browsers, for obvious reasons. In that case, you might as well just stick with the table layout if it already works for you, if you need to support browsers that don't support flexbox.

Answer 2

There is no display:flex-item because once you set display:flex on a container element, the children are automatically flex items.

Here is a demo to show that the display:table-cell on the children does not effect the functionality of the flex properties on the children

Edit: For Firefox and IE if you add the rule display:flex after the display:table-cell rule then the display:table-cell on the children does not effect the functionality of the flex properties on the children

/* flex layout with display:table falllback */

.layout {
  display: table; /* falllback */
  width: 100%; /* falllback */
  display: flex;
}

.layout > .picture {
  display: table-cell; /* falllback */
  width: 30%; /* falllback */
  display:flex; /* to make FF and IE happy */
  flex: 0 1 30%;
  background: tomato;
}

.layout > .details {
  display: table-cell; /* falllback */
  width: auto; /* falllback */
  display:flex; /* to make FF and IE happy */
  flex: 1 1 auto;
  background: aqua;
}

<div class="layout">
  <div class="picture">
    <img src="...">
  </div>
  <div class="details">username, email, etc.</div>
</div>