Set Parent Width equal to Children Total Width using only CSS?

Question

I don't know how many .child elements .parent will contain but I know their individual width.

I want to set the width of .parent to be equal to (width of each .child) * (total number of .child)

I don't want to use floats and width: auto;

Can I do something with calc() without using Javascript ?

**CSS : **

.parent {
  height: 100%;
  width: calc({number of children} * {width of each child = 100px});
}

.child {
  height: 100px;
  width: 100px;
}

HTML :

<div class="parent">
  <div class="child">
  <div class="child">
  <div class="child">
</div>

Answer 1

I know this is a bit late, but Hope this will help somebody who is looking for similar solution:

<div class="parent" style="display: inline-flex">
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
        </div>

the trick is to use inline-flex for the parent and inline-table for the child. Everything is dynamic. I make the table scrollable horizontally by adding another grandparent with overflow-x:scroll;:

<div class="grandparent" style="width: 300px; overflow-x: scroll; background: gray">
        <div class="parent" style="display: inline-flex">
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
            <div class="child" style="display: inline-table">some button</div>
        </div>
    </div>