How to clear a selected value selectize.js dropdow

问题:

I have a selectize.js dropdown & I have to clear the selected value .

I have tried :

var selectize = $("#optionNetFlow")[0].selectize;
selectize.clear();

as suggested in an another question How do I set the selectize.js option List programmatically. But it gives an error,

Uncaught TypeError: Cannot read property 'selectize' of undefinedmessage: "Cannot read property 'selectize' of undefined"stack: (...)get stack: function () { [native code] }arguments: nullcaller: nulllength: 0name: ""prototype: StackTraceGetterconstructor: function () { [native code] }__proto__: Object__proto__: function Empty() {}<function scope>set stack: function () { [native code] }__proto__: Error

when I change it to :

    var selectize = $("#optionNetFlow").selectize;
    selectize.clear();

I gives error:

TypeError: undefined is not a functionmessage: "undefined is not a function"stack: (...)get stack: function () { [native code] }set stack: function () { [native code] }__proto__: Error VM1253:3(anonymous function) VM1253:3InjectedScript._evaluateOn VM1251:732InjectedScript._evaluateAndWrap VM1251:665InjectedScript.evaluate VM1251:579

what I am doing wrong here?

回答1:

I finally found the answer here Selectize.js Demos

What works for me is:

 var $select = $('#optionNetFlow').selectize();
 var control = $select[0].selectize;
 control.clear();

what I was missing var $select = $('#optionNetFlow').selectize(); before applying the solution provided in above question's answer.

Now I am to get all the functions in console like :

回答2:

Try this out:- http://jsfiddle.net/adiioo7/2gnq1ruv/204/

JS:-

jQuery(function ($) {
    var $select = $('#input-tags').selectize({
        persist: false,
        create: true
    });

    $("#btnClear").on("click", function () {
        var selectize = $select[0].selectize;
        selectize.clear();

    });
});

回答3:

Try this,

$("#optionNetFlow")[0].selectize.clear();

回答4:

$(document).on('click', 'div.selectize-input div.item', function(e) {
    var select = $('#services').selectize();
    var selectSizeControl = select[0].selectize;
    // 1. Get the value
    var selectedValue = $(this).attr("data-value");
    // 2. Remove the option
    select[0].selectize.removeItem(selectedValue);
    // 3. Refresh the select
    select[0].selectize.refreshItems();
    select[0].selectize.refreshOptions();
});

This do not remove the item from the select, just remove it from the selected options.

回答5:

Or if you have multi select, and do want to restore selected items in the drop-down list (hide selected set to true).

var selectize = $("#select-item").selectize;
//clone array
var items = selectize.items.slice(0);
for (var i in items) {
    selectize.removeItem(items[i]);
}
selectize.refreshOptions();

回答6:

All other answers either clear a single selectize or need a specific reference to the selectize in the moment of it's creation.

The solution below, on the other hand, works for any number of selectize elements you have inside any form; you just need to specify the desired form:

$('form').find('.selectized').each(function(index, element) { element.selectize && element.selectize.clear() })

The rationale is that Selectize keeps the original element in the DOM (hiding it), adds a reference to the selectize on the .selectize property of the DOM element and adds a CSS class selectized to it.

So the solution finds all the elements that have the CSS class selectized, loops through them and calls element.selectize.clear().