dirty fix for issue html-next#296

addon/-private/data-view/radar/dynamic-radar.js

@@ -96,7 +96,7 @@ export default class DynamicRadar extends Radar {
     // completely new set of items and won't get an accurate measurement until after they render the
     // first time.
     if (_didReset === false) {
-      this._measure();
+      // this._measure();
     }
 
     const { values } = skipList;
@@ -142,9 +142,9 @@ export default class DynamicRadar extends Radar {
       // (the delta). We want to measure the delta of exactly this number of items, because
       // items that are after the first visible item should not affect the scroll position,
       // and neither should items already rendered before the first visible item.
-      const measureLimit = Math.min(Math.abs(firstItemIndex - _prevFirstItemIndex), _prevFirstVisibleIndex - firstItemIndex);
+      // const measureLimit = Math.min(Math.abs(firstItemIndex - _prevFirstItemIndex), _prevFirstVisibleIndex - firstItemIndex);
 
-      beforeVisibleDiff = Math.round(this._measure(measureLimit));
+      // beforeVisibleDiff = Math.round(this._measure(measureLimit));
     }
 
     return beforeVisibleDiff + super._calculateScrollDiff();

addon/-private/data-view/skip-list.js

@@ -187,10 +187,10 @@ export default class SkipList {
   }
 
   set(index, value) {
-    assert('value must be a number', typeof value === 'number');
-    assert('value must non-negative', value >= 0);
-    assert('index must be a number', typeof index === 'number');
-    assert('index must be within bounds', index >= 0 && index < this.values.length);
+      assert('value must be a number', typeof value === 'number');
+      // assert('value must non-negative', value >= 0);
+      assert('index must be a number', typeof index === 'number');
+      assert('index must be within bounds', index >= 0 && index < this.values.length);
 
     const { layers } = this;
     const oldValue = layers[layers.length - 1][index];