TreeListBase.ExpansionChanging

Syntax

ExpansionChanging: function(sender, args);

Parameters

sender. Event source.

args. Event information:

Description

The ExpansionChanging event occurs before changing expander value.

Example

Executing the example requires the SimpleTreeList component with the Tree identifier (see Example of Creating the SimpleTreeList Component).

// Set event
Tree.ExpansionChanging.add( function(sender, args) {
  console.log("ExpansionChanging event:");
  console.log(args);
});
// Initialize event
Tree.setNodeExpanded(0, true);

After executing the example the ExpansionChanging event is added.

See also:

TreeListBase