Count number of options in selectize.js

Question

how to count number of options in dropdown using selectize.js?

$('#MyDrop option').length;

$('#MyDrop option').size();

Above ones are not working with selectize !

Answer 1

Get all options of selectize

let options = $('#selectElem')[0].selectize.options;

Get all keys of object

let count = Object.keys(options);
console.log(count.length);