Fixed js error when click the page (#1401)

themes/vue/source/js/common.js

@@ -155,21 +155,24 @@
     var player = new Vimeo.Player(iframe)
     var overlay = document.createElement('div')
         overlay.className = 'overlay'
+    var isOpen = false
 
     modalButton.addEventListener('click', function(event) {
       event.stopPropagation()
       videoModal.classList.toggle('open')
       document.body.classList.toggle('stop-scroll')
       document.body.appendChild(overlay)
       player.play()
+      isOpen = true
     })
 
     document.body.addEventListener('click', function(e) {
-      if (e.target !== modalButton && !videoModal.contains(e.target)) {
+      if (isOpen && e.target !== modalButton && !videoModal.contains(e.target)) {
         videoModal.classList.remove('open')
         document.body.classList.remove('stop-scroll')
         document.body.removeChild(overlay)
         player.unload()
+        isOpen = false
       }
     })
   }