Tips for modifying the class of a span inline element using a javascript function

Looking for assistance in creating a password text box with an eye icon that toggles visibility. When the user clicks on the eye icon, it should change to a crossed-out eye icon and switch the input type to text.

<div class="input-group show-hide-password">
      <form:password id="form-control" path="password" class="form-control" required="" />
       <div class="input-group-append">
         <span id="PassSpan" class="input-group-text" onclick="typeChange('form- 
         control','PassSpan')">
          <i class="fa fa-eye"  aria-hidden="true"></i> 
         </span>
       </div>
</div>

Javascript function:

function typeChange(controlId, spanId) { 
     var x =  document.getElementById(controlId);        
     if (x.type === "password")
     { x.type = "text";         
     } 
     else { 
         x.type = "password";           
         } 
 }

I have successfully implemented the input type change functionality, but I am struggling to also change the class to 'fa fa-eye-slash' for the icon within the span element. The classes are defined in the CSS file, but I am unsure how to dynamically update the class of the HTML element.

If anyone has a solution for this, I would greatly appreciate your help.

javascriptcssbootstrap-4

Answer №1

You can find an example below that demonstrates the desired functionality. (taken from a codepen fiddle)

$(".toggle-password").click(function() {
  $(this).toggleClass("fa-eye fa-eye-slash");
  var input = $($(this).attr("toggle"));
  if (input.attr("type") == "password") {
    input.attr("type", "text");
  } else {
    input.attr("type", "password");
  }
});
.panel {
  margin: 20px;
}

.field-icon {
  float: right;
  margin-left: -25px;
  margin-top: -25px;
  margin-right: 10px;
  position: relative;
  z-index: 2;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div class="panel panel-default">
  <div class="panel-body">
    <form class="form-horizontal" method="" action="">
      <div class="form-group">
        <label class="col-md-4 control-label">Password</label>
        <div class="col-md-6">
          <input id="password-field" type="password" class="form-control" name="password" value="mypassword">
          <span toggle="#password-field" class="fa fa-fw fa-eye field-icon toggle-password"></span>
        </div>
      </div>
    </form>
  </div>
</div>

Answer №2

Thanks everyone! I was able to resolve the issue by creating a new JavaScript function and calling it onclick.

function togglePasswordVisibility(controlId, spanId) { 
     var inputField =  document.getElementById(controlId);
     if ( spanId.classList.contains('fa-eye') ){
         spanId.classList.toggle('fa-eye-slash');
     }
     if (inputField.type === "password")
     { inputField.type = "text";      
     }
     else { 
         inputField.type = "password"; 
     }
}

Here is the snippet of JSP code:

<i class="fa fa-eye" id ="passi" aria-hidden="true" onclick="togglePasswordVisibility('form-control',this)"></i>

Answer №3

Feel free to test out this code snippet which is designed to modify the CSS classes of your HTML tags.

function hasClass(el, className)
{
    if (el.classList)
        return el.classList.contains(className);
    return !!el.className.match(new RegExp('(\\s|^)' + className + '(\\s|$)'));
}

function addClass(el, className)
{
    if (el.classList)
        el.classList.add(className)
    else if (!hasClass(el, className))
        el.className += " " + className;
}

function removeClass(el, className)
{
    if (el.classList)
        el.classList.remove(className)
    else if (hasClass(el, className))
    {
        var reg = new RegExp('(\\s|^)' + className + '(\\s|$)');
        el.className = el.className.replace(reg, ' ');
    }
}
function typeChange(controlId, spanId) { 
console.info(spanId);
var x =  document.getElementById(controlId);
var iconObj = document.getElementById(spanId);
if (x.type === "password"){
x.type = "text";
for(var i = 0; i < iconObj.children.length; i++){
if(iconObj.children[i]!=null && hasClass(iconObj.children[i], "fa-eye")){
removeClass(iconObj.children[i], "fa-eye");
addClass(iconObj.children[i], "fa-eye-slash");
}
}
} else {
x.type = "password";
for(var i = 0; i < iconObj.children.length; i++){
if(iconObj.children[i]!=null && hasClass(iconObj.children[i], "fa-eye-slash")){
removeClass(iconObj.children[i], "fa-eye-slash");
addClass(iconObj.children[i], "fa-eye");
}
}
} 
}

<div class="input-group show-hide-password">
      <form:password id="form-control" path="password" class="form-control" required="" />
       <div class="input-group-append">
         <span id="PassSpan" class="input-group-text" onclick="typeChange('form- 
         control','PassSpan')">
          <i class="fa fa-eye"  aria-hidden="true"></i> 
         </span>
       </div>
</div>

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