I am struggling with using flexbox to achieve that
This code is quite self explaining
<div id="inlineWrapper">
    <div class="widthOfTheContent">Some label</div>
    <div class="widthOfRemainingSpace"> <input class="width-100"/> </div>
</div>
I tried to play with flexbox but could not figure out how to make the first inline div to take the width of the content
 
     
    