z-index + overflow:auto = bug?

Question

I am making popups as position:fixed div and propogate through hierarchy z-index to ensure that this div is on top of everything. Everything fine, except one case when Chrome draw scroll over my popup, iOS safari clips my popop.

I made super small repro https://codepen.io/heavenmaster/pen/XWrQmZY Note, position absolute and setting z-index is essential for me.

I desperately need a workaround.

.scrollview {
  z-index: 1;
  position: absolute;
  margin: 100px;
  width: 200px;
  height: 200px;
  border: solid gray 1px;
  overflow: auto;
}

.container {
  z-index: 1;
  position: absolute;
  width: 1000px;
  height: 1000px;
}

.tooltip {
  z-index: 1;
  width: 250px;
  height: 50px;
  border: solid 1px gray;
  background: silver;
  position: fixed;
  left: 80px;
  top: 80px;
}

<div class='scrollview'>
  <div class='container'>
    <div class='tooltip'>Tooltip</div>
  </div>
</div>

Answer 1

ok let's try this I hope its help:

.scrollview1
{
  z-index: 1;
    position: absolute;
    margin: 100px;
    width: 250px;
    height: 200px;
}
.scrollview
{
  z-index: 1;
/*   position: absolute; */
/*   margin: 100px; */
  width: 200px;
  height: 200px;
  border: solid gray 1px;
  overflow: auto;
}

.container{
  z-index: 1;
/*   position: absolute; */
  width: 1000px;
  height: 1000px;  
}

.tooltip{
  z-index: 1;
  width: 250px;
  height: 50px;
  border: solid 1px gray;
  background: silver;
  position: fixed;
  left: 80px;
  top: 80px;
}

<div class='scrollview1'><div class='scrollview'>   
  <div class='container'>    
    <div class='tooltip'>Tooltip</div>    
  </div>  
  </div></div>