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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <div class="container">
<div class="card col-lg-8">
  <civ class="card-body">
    <h5><div class="card-header">My tricked out form
                        <div class="alert alert-success alert-dismissible fade show" role="alert" id="success_message" style="display:none; "> 
                      <h3>Great!</h3> Form has been submitted successfully. You may now enter the site. 
                      <button id="successalert" type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                    </div>
                    <div class="alert alert-warning alert-dismissible fade show" role="alert" id="error_message" style="display:none; "> 
                      <h3>Error!</h3> You have missing responses. 
                      <button id="warningalert" type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                   </div>
      </div></h5>
<form class="needs-validation" novalidate>
  <div class="form-row">
    <div class="col-md-4 mb-3">
      <label for="validationTooltip01">First name</label>
      <input type="text" class="form-control" id="validationTooltip01" placeholder="First name" value="Mark" required>
      <div class="valid-feedback">
        Looks good!
      </div>
      <div class="invalid-feedback">
        Please enter your name.
      </div>      
    </div>
    <div class="col-md-4 mb-3">
      <label for="validationTooltip02">Last name</label>
      <input type="text" class="form-control" id="validationTooltip02" placeholder="Last name" value="Otto" required>
      <div class="valid-feedback">
        Looks good!
      </div>
      <div class="invalid-feedback">
        Please enter your last name.
      </div>  
    </div>
    <div class="col-md-4 mb-3">
      <label for="validationTooltipUsername">Username</label>
      <div class="input-group">
        <div class="input-group-prepend">
          <span class="input-group-text" id="validationTooltipUsernamePrepend">@</span>
        </div>
        <input type="text" class="form-control" id="validationTooltipUsername" placeholder="Username" aria-describedby="validationTooltipUsernamePrepend" required>
        <div class="valid-feedback">
        Looks good!
      </div>
        <div class="invalid-feedback">
          Please choose a unique and valid username.
        </div>
      </div>
    </div>
  </div>
  <div class="form-row">
    <div class="col-md-6 mb-3">
      <label for="validationTooltip03">City</label>
      <input type="text" class="form-control" id="validationTooltip03" placeholder="City" required>
      <div class="valid-feedback">
        Looks good!
      </div>
      <div class="invalid-feedback">
        Please provide a valid city.
      </div>
    </div>
    <div class="col-md-3 mb-3">
      <label for="validationTooltip04">State</label>
      <input type="text" class="form-control" id="validationTooltip04" placeholder="State" required>
      <div class="valid-feedback">
        Looks good!
      </div>
      <div class="invalid-feedback">
        Please provide a valid state.
      </div>
    </div>
    <div class="col-md-3 mb-3">
      <label for="validationTooltip05">Zip</label>
      <input type="text" class="form-control" id="validationTooltip05" placeholder="Zip" required>
      <div class="valid-feedback">
        Looks good!
      </div>
      <div class="invalid-feedback">
        Please provide a valid zip.
      </div>
    </div>
  </div>
    <div class="form-group formbtns">
    <div class="form-check form-check-inline">
      <apan id="tandppop" class="d-inline-block" data-toggle="popover" data-placement="auto" title="Hold on slick" data-content="You have to read the Terms and Privacy before you can check the box. Yes. It's required">
      <input name="tcheck" class="form-check-input" type="checkbox" value="" style="pointer-events: none;"id="invalidCheck" disabled required >
        <label class="form-check-label" for="invalidCheck">
        <button id="tandpbtn" type="button" class="btn btn-sm btn-primary" data-toggle="modal" data-target="#tandpmodal">Agree to terms and privacy</button>
      </label>
       
      <div class="invalid-feedback">
        You must agree before submitting.
      </div>
    </div>     
  </div>
      </apan>
  <div class="card-footer">
  <button class="btn btn-primary" type="submit">Submit form</button>
    <span id="sitebtntip" class="d-inline-block" tabindex="0" data-toggle="tooltip" title="Form must be valid first">
      <a id="sitebtn" class="btn btn-primary disabled" href="#" role="button" aria-disabled="true" style="pointer-events: none;">Enter Site</a></span>
  </div>
</form>
  </div>
</div>
</div>

<div id="tandpmodal" class="modal fade bd-example-modal-lg" tabindex="-1" role="dialog" aria-labelledby="tandpmodal" aria-hidden="true">
  <div class="modal-dialog modal-lg" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">Terms and Privacy</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
<div id="accordion">
  <div class="card">
    <div class="card-header" id="headingOne">
      <h5 class="mb-0">
        <button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
          Terms and Conditions
        </button>
      </h5>
    </div>

    <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
      <div class="card-body">
<ul class="list-group">
  <li class="list-group-item">Cras justo odio</li>
  <li class="list-group-item">Dapibus ac facilisis in</li>
  <li class="list-group-item">Morbi leo risus</li>
  <li class="list-group-item">Porta ac consectetur ac</li>
  <li class="list-group-item">Vestibulum at eros</li>
</ul>
      </div>
    </div>
  </div>
  <div class="card">
    <div class="card-header" id="headingTwo">
      <h5 class="mb-0">
        <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
          Privacy Policy
        </button>
      </h5>
    </div>
    <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordion">
      <div class="card-body">
<ul class="list-group">
  <li class="list-group-item">Cras justo odio</li>
  <li class="list-group-item">Dapibus ac facilisis in</li>
  <li class="list-group-item">Morbi leo risus</li>
  <li class="list-group-item">Porta ac consectetur ac</li>
  <li class="list-group-item">Vestibulum at eros</li>
</ul>
      </div>
    </div>
  </div>
        </div>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>
!

CSS 

              
                body {background-color: #B0BEC5;}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
ul li.list-group-item { 
    list-style: decimal inside;
    display: list-item;
}
.form-control {
  background-color: #f5f5f5;
}
.form-control:focus {
  background-color: #ffffff;
}
.right {
  float: right;
}
.formbtns {
  display: flex;
  justify-content: space-around;
}
.popover {
    background-color: #f8f9fa;
}
.popover-header {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeeba;
}
.card-footer {
  display: flex;
  justify-content: space-between;
}
!

JS 

              
                // Example starter JavaScript for disabling form submissions if there are invalid fields
(function() {
  'use strict';
  window.addEventListener('load', function() {
    // Fetch all the forms we want to apply custom Bootstrap validation styles to
    var forms = document.getElementsByClassName('needs-validation');
    // Loop over them and prevent submission
    var validation = Array.prototype.filter.call(forms, function(form) {
      form.addEventListener('submit', function(event) {
        if (form.checkValidity() === false) {        
         $('#error_message').show();
          event.preventDefault();
          event.stopPropagation();
        }
        form.classList.add('was-validated');
 if (form.checkValidity() === true) {
     event.preventDefault();
     event.stopPropagation();
     $('#success_message').show();
   $("#sitebtn").removeClass("disabled");
$("#sitebtn").css("pointer-events","auto");
     request.doSubmit();
       }
      }, false);
    });
  }, false);
})();
$( "#tandpbtn" ).click(function() {
$("#invalidCheck").prop("disabled",false); 
$('#tandppop').popover('dispose');
$("#invalidCheck").css("pointer-events","auto"); $("#sitebtntip").tooltip('dispose');
});

//Using localstorage to remember checkbox value
$(function() {
        var data = localStorage.getItem("tcheck");
        if (data !== null) {
            $("input[name='tcheck']").attr("checked", "checked");         $("#invalidCheck").prop("disabled",false); 
$('#tandppop').popover('dispose');
$("#invalidCheck").css("pointer-events","auto");
        }
    });
    $("input[name='tcheck']").click(function() {
        if ($(this).is(":checked")) {
            localStorage.setItem("tcheck", $(this).val());
        } else {
            localStorage.removeItem("tcheck");
$("#invalidCheck").css("pointer-events","none");          $("#invalidCheck").prop("disabled",true);
 $('#tandppop').popover('enable');         
        }
    });
//initialize popover and tooltip
$(function () {
  $('[data-toggle="popover"]').popover()
})
$(function () {
  $('[data-toggle="tooltip"]').tooltip()
})
!
999px

Console