CSS3 -ms-max-content in IE11

This works on IE11, Chrome and Firefox

instead of

width: -moz-max-content;
width: -webkit-max-content;
width: -o-max-content;
width: -ms-max-content;

I used

width: auto;
white-space: nowrap;

-max-content it is not supported by IE, according to CanIuse.

So I created a fallback for IE that might help you, by setting .button to display:inline-block:

.button {
  background: #d1d1d1;
  margin: 2px;
  cursor: pointer;
  width: -moz-max-content;
  width: -webkit-max-content;
  width: -o-max-content;
  /* width: -ms-max-content;*/
}


/* fallback for IE*/

.button {
  display: inline-block;
}
<div>
  <div class="button">Short t.</div>
  <div class="button">Looooooong text</div>
  <div class="button">Medium text</div>
</div>

UPDATE: (Based on OP comment)

It's working, but I don't want to display the elements inline.

here is the final answer:

.button {
  background: #d1d1d1;
  margin: 2px;
  cursor: pointer;
  width: -moz-max-content;
  width: -webkit-max-content;
  width: -o-max-content
  /* width: -ms-max-content;*/
}
/* fallback for IE*/
.width {
  width:100%
}
.button {
  display: inline-block;
}
<div>
  <div class="width">
    <div class="button">Short t.</div>
  </div>
  <div class="width">
    <div class="button">Looooooong text</div>
  </div>
  <div class="width">
    <div class="button">Medium text</div>
  </div>
</div>

NEW UPDATE

Nowadays and for awhile there is a cleaner approach to this issue, by simply setting the parent as display: flex, and you even won't need the *-max-content value in width property

.button {
  background: #d1d1d1;
  margin: 2px;
  cursor: pointer;
}


/* the fix */

section {
  display: flex
}
<section>
  <div class="button">Short t.</div>
  <div class="button">Looooooong text</div>
  <div class="button">Medium text</div>
</section>