​x
 
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<!DOCTYPE html>
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<title>My Example</title>
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​
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<!-- Latest compiled and minified Bootstrap CSS -->
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
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​
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<style>
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body {
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padding-top: 1em;
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}
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</style> <div class="container-fluid">
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<div class="form-group has-success">
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<label class="col-form-label" for="username">Success</label>
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<input type="text" class="form-control form-control-success" id="username" aria-describedby="usernameStatus">
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<div class="form-control-feedback">Congratulations on your new username!</div>
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</div>
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​
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<div class="form-group has-warning">
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<label class="col-form-label" for="password">Warning</label>
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<input type="password" class="form-control form-control-warning" id="password" aria-describedby="passwordStatus">
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<div class="form-control-feedback">C'mon, you can do better than that username...</div>
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</div>
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​
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<div class="form-group has-danger">
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<label class="col-form-label" for="phone">Danger</label>
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<input type="tel" class="form-control form-control-danger" id="phone" aria-describedby="phoneStatus">
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<div class="form-control-feedback">That username's so bad, we can't accept it.</div>
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</div>
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​
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</div>
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<!-- jQuery library -->
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<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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​
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<!-- Popper -->
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<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
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​
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<!-- Latest compiled and minified Bootstrap JavaScript -->
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
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​
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<!-- Initialize Bootstrap functionality -->
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<script>
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// Initialize tooltip component
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$(function () {
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  $('[data-toggle="tooltip"]').tooltip()
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})
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​
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// Initialize popover component
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$(function () {
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  $('[data-toggle="popover"]').popover()
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})
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</script>