How to set a value for a selectize.js input?

Solution 1:

Check the API Docs

Methods addOption(data) and setValue(value) might be what you are looking for.

Update: Seeing the popularity of this answer, here is some additional info based on comments/requests...

setValue(value, silent)
  Resets the selected items to the given value.
  If "silent" is truthy (ie: true, 1), no change event will be fired on the original input.

addOption(data)
  Adds an available option, or array of options. If it already exists, nothing will happen.
  Note: this does not refresh the options list dropdown (use refreshOptions() for that).

In response to options being overwritten:
This can happen by re-initializing the select without using the options you initially provided. If you are not intending to recreate the element, simply store the selectize object to a variable:

// 1. Only set the below variables once (ideally)
var $select = $('select').selectize(options);  // This initializes the selectize control
var selectize = $select[0].selectize; // This stores the selectize object to a variable (with name 'selectize')

// 2. Access the selectize object with methods later, for ex:
selectize.addOption(data);
selectize.setValue('something', false);


// Side note:
// You can set a variable to the previous options with
var old_options = selectize.settings;
// If you intend on calling $('select').selectize(old_options) or something

Solution 2:

This works for me:

var $select = $("#my_input").selectize();
var selectize = $select[0].selectize;
selectize.setValue(selectize.search("My Default Value").items[0].id);

but you have to be really really sure that you only have one match.

Update: As this solution works perfect, in-order to make it working even if there are multiple select elements on page I have updated the answer:

Following way we can initialize:

$('select').each(function (idx) {
    var selectizeInput = $(this).selectize(options);
    $(this).data('selectize', selectizeInput[0].selectize);
});

Setting value pragmatically post initialization:

var selectElement = $('#unique_selector').eq(0);
var selectize = selectElement.data('selectize');
if (!!selectize) selectize.setValue("My Default Value");

Solution 3:

Answer by the user 'onlyblank' is correct. A small addition to that- You can set more than 1 default values if you want.

Instead of passing on id to the setValue(), pass an array. Example:

var $select = $("#my_input").selectize();
var selectize = $select[0].selectize;
var yourDefaultIds = [1,2]; # find the ids using search as shown by the user onlyblank
selectize.setValue(defaultValueIds);

Solution 4:

Here is my full code using tag from remote search. Hope this is helpful.

$('#myInput').selectize({
valueField: 'id',
labelField: 'name',
searchField: 'name',
options: [],
delimiter: ',',
persist: false,
create: false,
load: function(query, callback) {
    if (!query.length) return callback();
    $.ajax({
        url: '/api/all_cities.php',
        type: 'GET',
        dataType: 'json',
        data: {
            name: query,
        },
        error: function() {
            callback();
        },
        success: function(res) {
            callback(res);
        }
    });
},
onInitialize: function(){
    var selectize = this;
    $.get("/api/selected_cities.php", function( data ) {
        selectize.addOption(data); // This is will add to option
        var selected_items = [];
        $.each(data, function( i, obj) {
            selected_items.push(obj.id);
        });
        selectize.setValue(selected_items); //this will set option values as default
    });
}
});