'select all' and 'remove all' with chosen.js

Question

For the select menu plugin chosen.js, is there an established way to add \'select all items in list\' or \'remove all items in list\' feature to a multiple select input? In

Answer 1

$("#ctrlName option:selected").removeAttr("selected").trigger('liszt:updated'); 

clear all

$("#ctrlName option").attr("selected","selected").trigger('liszt:updated'); 

select all