Bootstrap Tutorial - Bootstrap Form Validation








Form Validation

Bootstrap also has three validation states for input elements:

  • has-success will make the label text and border field green in color
  • has-error will employ a brown color
  • has-warning will use dark red

Here's an example of how validation state can be used: 

<!DOCTYPE html>
<html lang="en">
<head>
<script type='text/javascript'
  src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
<link rel="stylesheet"
  href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet"
  href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap-theme.min.css">
<script
  src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script
  src="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){<!--from   w w w.  j  a  v  a2 s. c o m-->
    $('.myDropdownHandle').dropdown('toggle');
});
</script>  
</head>
  <body style='margin:30px'>
        <div class="form-group has-success">
           <label  class="control-label" 
                   for="inputField">Input with success</label>
           <input  type="text" class="form-control" id="inputField"/>
        </div>
  </body>
</html>

Click to view the demo

These has-* type classes will only apply colors to form-control, control-label, and help-block classed elements.





Example

<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap-theme.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script> 
<style type="text/css">
    .bs-example{<!--from   w  w w .  j  a  va 2  s . co  m-->
      margin: 20px;
    }
</style>
</head>
<body>
<div class="bs-example">
    <form class="form-horizontal">
        <div class="form-group has-success">
            <label class="col-xs-2 control-label" for="inputSuccess">Username</label>
            <div class="col-xs-10">
                <input type="text" id="inputSuccess" class="form-control" 
                placeholder="Input with success">
                <span class="help-block">Username is available</span>
            </div>
        </div>
        <div class="form-group has-warning">
            <label class="col-xs-2 control-label" for="inputWarning">Password</label>
            <div class="col-xs-10">
                <input type="password" id="inputWarning" class="form-control" 
                placeholder="Input with warning">
                <span class="help-block">Password strength: Weak</span>
            </div>
        </div>
        <div class="form-group has-error">
            <label class="col-xs-2 control-label" for="inputError">Email</label>
            <div class="col-xs-10">
                <input type="email" id="inputError" class="form-control" 
                placeholder="Input with error">
                <span class="help-block">Please enter a valid email address</span>
            </div>
        </div>
    </form>
</div>
</body>
</html>

Click to view the demo





Icon Feedback

We can add feedback icons to inputs using the class .has-feedback on .form-group and the right glyphicon.

<!--from   ww  w .  java 2 s .com-->
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap-theme.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script> 
<style type="text/css">
    .bs-example{
      margin: 20px;
    }
</style>
</head>
<body>
<div class="bs-example">
    <form class="form-horizontal">
        <div class="form-group has-success has-feedback">
            <label class="col-xs-2 control-label" for="inputSuccess">Username</label>
            <div class="col-xs-10">
                <input type="text" id="inputSuccess" class="form-control" 
                placeholder="Input with success">
                <span class="glyphicon glyphicon-ok form-control-feedback"></span>
                <span class="help-block">Username is available</span>
            </div>
        </div>
        <div class="form-group has-warning has-feedback">
            <label class="col-xs-2 control-label" for="inputWarning">Password</label>
            <div class="col-xs-10">
                <input type="password" id="inputWarning" class="form-control" 
                placeholder="Input with warning">
                <span class="glyphicon glyphicon-warning-sign form-control-feedback"></span>
                <span class="help-block">Password strength: Weak</span>
            </div>
        </div>
        <div class="form-group has-error has-feedback">
            <label class="col-xs-2 control-label" for="inputError">Email</label>
            <div class="col-xs-10">
                <input type="email" id="inputError" class="form-control" placeholder="Input with error">
                <span class="glyphicon glyphicon-remove form-control-feedback"></span>
                <span class="help-block">Please enter a valid email address</span>
            </div>
        </div>
    </form>
</div>
</body>
</html>

Click to view the demo