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src/DragContainer.vue

@@ -21,16 +21,14 @@ export default {
   methods: {
     handleDragStart(event) {
       event.dataTransfer.setData(
-          "vueDrag/gridItem",
-          JSON.stringify(
-              {
-                key: this.dragID,
-                x: this.x,
-                y: this.y,
-                w: this.w,
-                h: this.h
-              }
-          )
+        "vueDrag/gridItem",
+        JSON.stringify({
+          key: this.dragID,
+          x: this.x,
+          y: this.y,
+          w: this.w,
+          h: this.h,
+        })
       );
     },
   },

src/Grid.vue

@@ -39,9 +39,16 @@ export default {
       let data = event.dataTransfer.getData("vueDrag/gridItem");
       let element = JSON.parse(data);
       console.log(element);
-      this.items.splice(this.items.findIndex((i) => {return i.key === element.key}), 1);
-      element.x = 1 + Math.trunc(event.layerX / (event.target.offsetWidth / this.cols));
-      element.y = 1 + Math.trunc(event.layerY / (event.target.offsetHeight / this.rows));
+      this.items.splice(
+        this.items.findIndex((i) => {
+          return i.key === element.key;
+        }),
+        1
+      );
+      element.x =
+        1 + Math.trunc(event.layerX / (event.target.offsetWidth / this.cols));
+      element.y =
+        1 + Math.trunc(event.layerY / (event.target.offsetHeight / this.rows));
       this.items.push(element);
     },
   },