<button class="myBtn" data-modal="#myModal2" >Open Modal</button>
<div id="myModal2" class="modal">
  <div class="modal-content">
    <div class="modal-header">
      <span class="close">&times;</span>
     
    </div>
    <div class="modal-body">
       textвапвапвап
    </div>
  </div>
</div>

<button class="myBtn" data-modal="#myModal1" >Open Modal</button>
<div id="myModal1" class="modal">
  <div class="modal-content">
    <div class="modal-header">
      <span class="close">&times;</span>
     
    </div>
    <div class="modal-body">
       text
    </div>
  </div>
</div>

.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 100000; /* Sit on top */
    padding-top: 172px; /* Location of the box */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}

/* Modal Content */
.modal-content {
    position: relative;
    /* background-color: #fefefe; */
    margin: auto;
    padding: 0;
    /* border: 1px solid #888; */
    width: 684px;
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
    -webkit-animation-name: animatetop;
    -webkit-animation-duration: 0.4s;
    animation-name: animatetop;
    animation-duration: 0.4s;
}

/* Add Animation */
@-webkit-keyframes animatetop {
    from {top:-300px; opacity:0} 
    to {top:0; opacity:1}
}

@keyframes animatetop {
    from {top:-300px; opacity:0}
    to {top:0; opacity:1}
}

/* The Close Button */
.close {
    margin-top: -11px;
    color: white;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

document.body.addEventListener('click', function clickHamdler(evt) { // слушаем все клики
  const modalOpenBtn = evt.target.closest('[data-modal]'); // клик внутри кнопки?
  if (modalOpenBtn) {
    document.querySelector(modalOpenBtn.dataset.modal) // ищем модалку
      .style.display = 'block'; // покзываем
  }
  
  const modalCloseBtn = evt.target.closest('.close'); // клик внутри ".close"?
  if (modalCloseBtn) {
    modalCloseBtn.closest('.modal') // ищем модалку
      .style.display = 'none'; // скрываем
  }
  
  const modalBackdrop = evt.target.matches('.modal') ? evt.target : null; // клик по фону?
  if (modalBackdrop) {
    modalBackdrop
      .style.display = 'none'; // скрываем
  }
});