dynamic-virtual-scroller - npm Package Compare versions

Comparing version 2.2.1 to 2.2.2

package.json

 {
   "name": "dynamic-virtual-scroller",
-  "version": "2.2.1",
+  "version": "2.2.2",
   "description": "A virtual scroller for the web that can handle dynamic row and column sizes.",
@@ -5,0 +5,0 @@ "main": "virtual-scroller.js",

src/js/DataAdapter.js

@@ -16,3 +16,4 @@ import {ATTRIBUTES, EVENTS, CLASSES} from "./constants";
     config = validateParameters(config, {
-        loadRange: {type: 'function'}
+        loadRange: {type: 'function'},
+        rangeSize: {type: 'number', default: 25}
     });
@@ -73,9 +74,13 @@
 
+            var nextRangeIsLoaded = !!getRangeForIndex({ranges: requestedRanges, index: params.index + 1});
+            
+            /*
+                If the next range is already loaded, we preload into the other "direction" instead. 
+            */
             range = Range({
-                start: params.index,
-                end: params.index + 25
+                start: Math.max(nextRangeIsLoaded ? params.index - config.rangeSize : params.index, 0),
+                end: nextRangeIsLoaded ? params.index : params.index + config.rangeSize
             });
 
             requestedRanges = requestedRanges.concat(range);
-
         }
@@ -82,0 +87,0 @@

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Improved metrics

Total package byte prevSize

480980

increased by0.38%

Lines of code

6371

increased by0.5%

No dependency changes