Nits

OVERVIEW.md

@@ -69,16 +69,20 @@ For example, adding a function component `<Foo>` with an id 2:
 
 #### Removing a node
 
-Removing a fiber from the tree (a root or a leaf) only requires sending 2 numbers:
+Removing a fiber from the tree (a root or a leaf) requires sending:
 
 1. remove operation constant (`2`)
-1. fiber id
+1. how many items were removed
+1. number of children
+   * (followed by a children-first list of removed fiber ids)
 
-For example, removing a root fiber with an id of 1:
+For example, removing fibers with ids of 35 and 21:
 ```js
 [
   2, // remove operation
-  1, // fiber id
+  1, // number of removed fibers
+  35, // first removed id
+  21, // second removed id
 ]
 ```
 

src/devtools/store.js

@@ -601,8 +601,8 @@ export default class Store extends EventEmitter {
       }
     }
 
-    let addedElementIDs: Array<number> = [];
-    let removedElementIDs: Array<number> = [];
+    const addedElementIDs: Array<number> = [];
+    const removedElementIDs: Array<number> = [];
 
     let i = 2;
     while (i < operations.length) {
@@ -811,23 +811,6 @@ export default class Store extends EventEmitter {
             }
           }
           element.children = Array.from(nextChildren);
-
-          if (!element.isCollapsed) {
-            const prevWeight = element.weight;
-
-            let nextWeight = element.type === ElementTypeRoot ? 0 : 1;
-
-            nextChildren.forEach(childID => {
-              const child = ((this._idToElement.get(childID): any): Element);
-              nextWeight += child.isCollapsed ? 1 : child.weight;
-            });
-
-            element.weight = nextWeight;
-            // TODO: passing null here is suspicious, but it's existing behavior.
-            // It is suspicious because either we shouldn't need a delta at all--
-            // or we should apply it to all parents, and not just this item.
-            this._adjustParentTreeWeight(null, nextWeight - prevWeight);
-          }
           break;
         }
         case TREE_OPERATION_UPDATE_TREE_BASE_DURATION: