js code of generic modal

generic_modal.js

function openModal() {
  var modal = document.getElementById('gmModal');
  modal.style.display = "block";
}
function closeModal() {
  var modal = document.getElementById('gmModal');
  modal.style.display = "none";
}
window.onclick = function(event) {
  var modal = document.getElementById('gmModal');
  if (event.target == modal) {
    modal.style.display = "none";
  }
}

generic_modal.scss

.modal {
  display: none;
  position: fixed;
  z-index: 1;
  padding-top: 100px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgb(0,0,0);
  background-color: rgba(0,0,0,0.4);
}
.modal-content {
  background-color: #fefefe;
  margin: auto;
  padding: 10px 20px;
  width: 50%;
  border-radius: 5px;
  min-height: 100px;
}
.close {
  color: #aaaaaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}
.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}
.btn-open-modal {
  border: 1px solid #ffffff;
  padding: 10px 30px;
  border-radius: 10px;
  font-weight: bold;
  cursor: pointer;
  transition: 0.3s;
  font-size: 100%;
}
.btn-open-modal:hover {
  background: #c6c6c6;
}
.gm-header {
  margin-bottom: 0px;
  border-bottom: 1px solid #d1d1d1;
}
.gm-title {
}
.gm-body {
  margin-top: 20px;
}