mobile: watching datasets from move- and resize-handler (buggy)

mosys @ 2853b20e

-Subproject commit 1d52a57a6afd99e86bb8bbc3c7766f60dbe1d383
+Subproject commit 2853b20e959c71780ddbcdcb2d5ef96a66081c2d

src/plugins/intersection-observer.js

 export default ({ Vue }) => {
   Vue.directive('intersection-observer', {
-    inserted: function (el) {
+    // bind: function (el, binding, vnode) {
+    bind: function (el) {
       const options = {
-        root: null,
+        // root: null,
         threshold: '0'
       }
       const observer = new IntersectionObserver(observerCallback, options)
       observer.observe(el)
 
       function observerCallback (entries) {
+        // console.log('entries', entries)
         entries.forEach(entry => {
           if (entry.isIntersecting) {
-            console.log('isIntersecting')
+            // console.log('BINDING', binding)
+            // console.log('isIntersecting', vnode)
+            // vnode.context.handlerNewCell.move.dataLeft = undefined
+            // vnode.context.handlerNewCell.move.dataLeft = undefined
+            el.dataset.left = 'xxx'
           }
           else {
-            console.log('nicht mehr intersecting')
-            console.log(entry.boundingClientRect.left)
+            // console.log('nicht mehr intersecting', vnode)
+            // vnode.context.handlerNewCell.move.dataLeft = entry.boundingClientRect.left
+            el.dataset.left = entry.boundingClientRect.left
+            // console.log('plugin', el.dataset)
+            // console.log(el.dataset.left)
+            // console.log('----------')
           }
         })
       }