$('#sidebar').w2sidebar({
name : 'sidebar',
nodes: [
{ id: 'id-1', text: 'Level 1' },
{ id: 'id-2', text: 'Level 2' },
{ id: 'id-3', text: 'Level 3' }
],
onExpand: function(event) {
console.log(event);
}
});
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w2ui.sidebar.on('expand', function(event) {
console.log(event);
});