Why modal-backdrop overlapped my popup modal even set !important and z-index? How to fix it?

Question

I had a successful message popup. Now I want to add a semi-transparent backdrop layer underneath with rgba(0,0,0,0.5), that I used CSS ::before. But the backdrop ::before { rgba(0,0,0,0.5) } seems to overlap my green popup, even when I set z-index and background: !important for the popup.

Here's the code I've tried

.alertMessageModal{ width:auto; height:auto; border-radius:10px; display:inline-block; position:fixed; top:20px; right:25px; color:#fff; padding:10px 15px; padding-bottom:15px; z-index:100; background:green !important;}
.alertMessageModal::before{content:''; position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0, 0, 0, 0.5); z-index:-100;}
.alertMessageModal .modal-title{ font-size:15px; float:left; line-height:18px;}
.alertMessageModal .close{ float:right; margin-left:10px; line-height: 15px; color:#fff;}

<div class="alertMessageModal bg-success">
  <h4 class="modal-title">Your message has been successfully sent</h4>
  <button type="button" class="close">&times;</button>
</div>

i want to UP green background. down transparent background. – Rohit Verma Dec 22 '19 at 07:26 — Rohit Verma, Dec 22 '19 at 07:26
So what attempts have you made? This should be simple – Paulie_D Dec 22 '19 at 07:28 — Paulie_D, Dec 22 '19 at 07:28

Loi Nguyen Huynh · Accepted Answer · 2019-12-22T08:08:44.953

You need to wrap the modal's content inside another extra wrapper div .modal-content. The example from w3school.

Your code doesn't work as expected because z index not working with fixed positioning

Here's the working code, I changed a few lines of code from yours:

/* renamed from .alertMessageModel::before */
.alertMessageModal {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: -100;
}
/* renamed from .alertMessageModal */
.modal-content {
  width: auto;
  height: auto;
  border-radius: 10px;
  display: inline-block;
  position: fixed;
  top: 20px;
  right: 25px;
  color: #fff;
  padding: 10px 15px;
  padding-bottom: 15px;
  z-index: 100;
  background: green !important;
}
.alertMessageModal .modal-title {
  font-size: 15px;
  float: left;
  line-height: 18px;
}
.alertMessageModal .close {
  float: right;
  margin-left: 10px;
  line-height: 15px;
  color: #fff;
}

<div class="alertMessageModal bg-success">

  <!-- added an extra div -->
  <div class="modal-content">
    <h4 class="modal-title">Your message has been successfully sent</h4>
    <button type="button" class="close">&times;</button>
  </div>

</div>

Thank you @Loi Nguyen Huynh – Rohit Verma Dec 23 '19 at 10:12 — Rohit Verma, Dec 23 '19 at 10:12

Why modal-backdrop overlapped my popup modal even set !important and z-index? How to fix it?

1 Answers1