Vue Js Modal Close when Click Outside

<!DOCTYPE html>
<html>

<body>
  <div id="app">
    <h3>Vue Js Close Modal When click Outside</h3>
    <button @click="openModal" class="open-modal">Open Modal</button>
    <div class="modal" v-if="isModalOpen">
      <div class="modal-content" ref="modalRef">
        <h3>Vue Js Close Modal when click outside</h3>

<button class="close-button" @click="closeModal">Close</button>
      </div>
    </div>
  </div>
  <script type="module">
    const app = new Vue({
      el: "#app",
      data() {
        return {
          isModalOpen: false
        };
      },
      methods: {
        openModal() {
          this.isModalOpen = true;
          // Attach the mouseup event listener to the document
          document.addEventListener('mouseup', this.closeModalOnClickOutside);
        },
        closeModal() {
          this.isModalOpen = false;
          // Remove the mouseup event listener from the document
          document.removeEventListener('mouseup', this.closeModalOnClickOutside);
        },
        closeModalOnClickOutside(event) {
          const modal = this.$refs.modalRef;
          if (!modal.contains(event.target)) {
            this.closeModal();
          }
        }
      }
    });
  </script>
  <style scoped>
    .modal {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.5);
      display: flex;
      justify-content: center;
      align-items: center;
    }

.modal-content {
      background-color: white;
      padding: 20px;
      border-radius: 5px;
      max-width: 400px;
    }

.open-modal {
      background-color: #007bff;
      color: #fff;
      padding: 10px 20px;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }

.close-button {
      background-color: #dc3545;
      color: #fff;
      padding: 10px 20px;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      float: right
    }

/* Hover effect */
    .open-modal:hover,
    .close-button:hover {
      opacity: 0.8;
    }
  </style>
</body>

</html>