Bootstrap Snippet File Upload Preview using HTML CSS Javascript

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<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
    <div class="row">
        <input type='file' onchange="readURL(this);" />
    </div>
    <img id="blah" src="http://placehold.it/180" alt="your image" />
</div>
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img{
  max-width:100px;
  height:100px;
  margin-top:20px;
}
input{
    margin-top:20px;
}
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 function readURL(input) {
            if (input.files && input.files[0]) {
                var reader = new FileReader();
                reader.onload = function (e) {
                    $('#blah')
                        .attr('src', e.target.result);
                };
                reader.readAsDataURL(input.files[0]);
            }
        }
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