Descriptive comment for TwinColSelect - no lazy load #11025 (#11350)

* Descriptive comment for TwinColSelect - no lazy load #11025

It documents the issue #11025

https://github.com/vaadin/framework/issues/11025#issuecomment-443506307

diff --git a/documentation/components/components-twincolselect.asciidoc b/documentation/components/components-twincolselect.asciidoc
index 66c2428f168d4f8505ed076a48621b81ce4a3bfa..ac2df4b788f21571156b9f83eeb65b5c1a6e5cbf 100644 (file)
--- a/documentation/components/components-twincolselect.asciidoc
+++ b/documentation/components/components-twincolselect.asciidoc
@@ -59,6 +59,11 @@ The [methodname]#setRows()# method sets the height of the component by the
 number of visible items in the selection boxes. Setting the height with
 [methodname]#setHeight()# to a defined value overrides the rows setting.
 
+[WARNING]
+The [classname]#TwinColSelect# does not provide lazy loading mechanism.
+Hence it will slow down significantly if used with large itemsets.
+The lazy loading feature could be implemented using two single column Grids instead.
+
 Common selection component features are described in
 <<dummy/../../../framework/components/components-selection#components.selection,"Selection
 Components">>.