Issue with negative z-index in modal window has not been resolved

I'm currently trying to customize the radio button using my own CSS styles, but I've encountered an issue. For some reason, setting the z-index to -1 is not working when the radio button is within a modal.

Below is the code snippet that I am working with:

(CSS code here)

(HTML code here)

I seem to be stuck on this problem and am unsure of what I might be overlooking. My goal is to replace the default radio button with a custom style positioned next to the flag icon.

If anyone has alternative solutions or insights, I would greatly appreciate them.

javascripthtmlcss

Answer №1

If you're struggling with z-index, consider using negative margin as an alternative solution. Here's how you can implement it:

z-index:-1;

The issue arises when the modal's z-index is set to a value like 999 or 9999, making it problematic for other elements to stay above it. By applying a negative margin, you can avoid affecting the layout.

.container{
 padding:50px; 
 width:100%;
 }
.langsection .langname{
 width:50%; 
 float:left;
 }
.langsection .langflag{
 width:50%; 
 float:left; 
 text-align:right;
 }
.modal.langmod .modal-dialog{
 width:400px; 
 margin:50px auto 0; 
 background:#fff; 
 border-radius:6px; 
 border:none;
 }
.modal .modal-body{
 padding:0; 
 border-radius:6px; 
 overflow:hidden;
 }
.selclang li{
 list-style:none; 
 text-transform:uppercase; 
 padding:10px 15px; 
 border-bottom:1px solid #e5e5e5;
 }
.modal-dialog::after{
 content:""; 
 clear:both; 
 display:table;
 }
.selclang{
 margin:0; 
 padding:0;
 }
.langflag span.flg_icn{
 padding-right:20px;
 }
.langflag span{
 display:inline-block;
 }
.selclang li.active, .selclang li:hover{
 background:#A40030; 
 color:#fff;
 }
.modal.fade.in{
 padding:0;
 }
.modal.langmod .modal-content{
 border:none;
 }
.modal.langmod p{
 text-transform:uppercase; 
 width:200px; margin:auto; 
 text-align:center;
 }
.langflag input[type="radio"]{
 width:18px; 
 height:18px; 
 opacity:0;
 }
.langflag input[type="radio"] + i{
 width:18px; 
 height:18px; 
 top:4px;  
 left:0; 
 border-radius:100%; 
 border:1px solid #e5e5e5; 
 margin-left: -20px;
 display:inline-block;
 }
.langflag input[type="radio"]:checked + i{
 box-shadow:0 0 3px 0 rgba(0,0,0,0) inset; 
 background:green;
 }
.flg_slct{
 position:relative;
 }
<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8>
  <meta name="viewport" content="width=device-width, initial-scale=1"></meta>
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <!-- Trigger the modal with a button -->
  <button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>

  <!-- Modal -->
  <div class="modal langmod fade" id="myModal" role="dialog">
    <div class="modal-dialog">
    
      <!-- Modal content-->
      <div class="modal-content clearfix">
        <div class="modal-body">
        <ul class="selclang">
        <li class="active">
        <div class="langsection clearfix">
        <div class="langname">English</div>
        <div class="langflag"><span class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        <li>
        <div class="langsection clearfix">
        <div class="langname">Nederlands</div>
        <div class="langflag"><span class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        <li>
        <div class="langsection clearfix">
        <div class="langname">Deutch</div>
         <div class="langflag"><span class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        <li>
        <div class="langsection clearfix">
        <div class="langname">Jezyk Polski</div>
        <div class="langflag"><span                       class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        </ul>
        <p>choose your language kies uw taal wahlen sie ihre sprache wybierz swoj jezyk</p>
        </div>
      </div>
    </div>
  </div>
</div>
</body>
</html>

Answer №2

Make sure to apply a positive z-index of 1 to the parent element with the class .flg_slct, everything else in your code looks good. 

 .container{
 padding:50px; 
 width:100%;
 }
.langsection .langname{
 width:50%; 
 float:left;
 }
.langsection .langflag{
 width:50%; 
 float:left; 
 text-align:right;
 }
.modal.langmod .modal-dialog{
 width:400px; 
 margin:50px auto 0; 
 background:#fff; 
 border-radius:6px; 
 border:none;
 }
.modal .modal-body{
 padding:0; 
 border-radius:6px; 
 overflow:hidden;
 }
.selclang li{
 list-style:none; 
 text-transform:uppercase; 
 padding:10px 15px; 
 border-bottom:1px solid #e5e5e5;
 }
.modal-dialog::after{
 content:""; 
 clear:both; 
 display:table;
 }
.selclang{
 margin:0; 
 padding:0;
 }
.langflag span.flg_icn{
 padding-right:20px;
 }
.langflag span{
 display:inline-block;
 }
.selclang li.active, .selclang li:hover{
 background:#A40030; 
 color:#fff;
 }
.modal.fade.in{
 padding:0;
 }
.modal.langmod .modal-content{
 border:none;
 }
.modal.langmod p{
 text-transform:uppercase; 
 width:200px; margin:auto; 
 text-align:center;
 }
.langflag input[type="radio"]{
 width:18px; 
 height:18px; 
 z-index:88; 
 opacity:0;
 }
.langflag input[type="radio"] + i{
 width:18px; 
 height:18px; 
 position:absolute; 
 top:4px;  
 left:0; 
 border-radius:100%; 
 border:1px solid #e5e5e5; 
 z-index:-1; 
 }
.langflag input[type="radio"]:checked + i{
 box-shadow:0 0 3px 0 rgba(0,0,0,0) inset; 
 background:green;
 }
.flg_slct{
 position:relative;
 z-index:1;
 }
<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

</head>
<body>

<div class="container">
  <!-- Trigger the modal with a button -->
  <button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>

  <!-- Modal -->
  <div class="modal langmod fade" id="myModal" role="dialog">
    <div class="modal-dialog">
    
      <!-- Modal content-->
      <div class="modal-content clearfix">
        <div class="modal-body">
        <ul class="selclang">
        <li class="active">
        <div class="langsection clearfix">
        <div class="langname">English</div>
        <div class="langflag"><span class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        <li>
        <div class="langsection clearfix">
        <div class="langname">Nederlands</div>
        <div class="langflag"><span class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        <li>
        <div class="langsection clearfix">
        <div class="langname">Deutch</div>
         <div class="langflag"><span class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        <li>
        <div class="langsection clearfix">
        <div class="langname">Jezyk Polski</div>
        <div class="langflag"><span                       class="flg_icn">Flag</span><span class="flg_slct"> <input type="radio" name="language"><i></i></span></div>
        </div>
        </li>
        <p>choose your language kies uw taal wahlen sie ihre sprache wybierz swoj jezyk</p>
        </div>
      </div>
    </div>
  </div>
</div>
</body>
</html>

Answer №3

From what I understand, the default z-index for a model dialog box is 1050. To ensure it displays correctly, you should set the z-index to a value higher than 1050, such as 1060.

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