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Hiding Options of a Select with JQuery

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迷失自我
迷失自我 2020-12-11 17:58

Okay, let\'s start with an example.
Keep in mind, this is only an example.

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  • 我在风中等你
    2020-12-11 18:15

    The hide() doesn't work for Chrome... I've been experimenting with a work-around and wrapped it in a plugin I called "ExtraBox". The idea is to store the options temporary so we can enable / disable them by manipulating the DOM. I've created the plugin to make it easier to use.

    I've posted the code on jsFiddle, so you can try it for yourself: http://jsfiddle.net/KeesCBakker/HaFRC/. [note: first project in jsFiddle, I'm loving it!]

    Html example:

    Select:
<br/>
<select id="TestKees">
    <option value="1" class="s1">First value</option>
    <option value="2" class="s2">Second value</option>
    <option value="3" class="s3">Third value</option>
</select>
<br/>
Enable / Disable
<br/>
<input id="txt" type="text" value="s2" />
<button id="btnEnable">Enable</button>

    I've added the following jQuery to my document.ready function:

    $('#TestKees').extraBox({ attribute: 'class' });

$('#btnEnable').click(function(){
    $('#TestKees').data('extraBox').enable(
        $('#txt').val()
    );
});

$('#btnDisable').click(function(){
    $('#TestKees').data('extraBox').disable(
        $('#txt').val()
    );  
});

    The plugin looks like this:

    (function($) {

    // Create ExtraBox object
    function ExtraBox(el, options) {

        // Default options for the plugin (configurable)
        this.defaults = {
            attribute: 'class'
        };
        // Combine default and options objects
        this.opts = $.extend({}, this.defaults, options);

        // Non-configurable variables
        this.$el = $(el);
        this.items = new Array();
    };

    // Separate functionality from object creation
    ExtraBox.prototype = {

        init: function() {
            var _this = this;
            $('option', this.$el).each(function(i, obj) {
                var $el = $(obj);
                $el.data('status', 'enabled');
                _this.items.push({
                    attribute: $el.attr(_this.opts.attribute),
                    $el: $el
                });
            });
        },
        disable: function(key){
            $.each(this.items, function(i, item){
                if(item.attribute == key){
                     item.$el.remove();
                     item.$el.data('status', 'disabled'); 
                } 
            });
        },
        enable: function(key){
            var _this = this;
            $.each(this.items, function(i, item){
                if(item.attribute == key){

                    var t = i + 1; 
                    while(true)
                    {
                        if(t < _this.items.length) {   
                            if(_this.items[t].$el.data('status') == 'enabled')  {
                                _this.items[t].$el.before(item.$el);
                                item.$el.data('status', 'enabled');
                                break;
                            }
                            else {
                               t++;
                            }   
                        }
                        else {                                                                               _this.$el.append(item.$el);
                            item.$el.data('status', 'enabled');
                            break;
                        }                   
                    }
                } 
            });     
        }
    };

    // The actual plugin - make sure to test
    // that the element actually exists.
    $.fn.extraBox = function(options) {

        if (this.length) {
            this.each(function() {
                var rev = new ExtraBox(this, options);
                rev.init();
                $(this).data('extraBox', rev);
            });
        }
    };
})(jQuery);
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  • 傲寒
    2020-12-11 18:18

    I've made available a jQuery Plugin that solves this very nicely. With it, you would do this:

    $('#selection1').hideOption('1');
$('#selection1').showOption('1');

    You can hide and show them as much as you want, and they will keep their original order. It works in all browsers. You can see that in this sample: jsFiddle - Toggle Dropdown Options

    You can get the Toggle Dropdown Options plug-in. If you don't like plug-ins, just copy the JavaScript code from it to your own project's JavaScript file. See the Read the Docs link on the plug-in for more information!

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  • 遇见更好的自我
    2020-12-11 18:22

    This Is Very Simple In Jquery

    //For Hide
$('#selection1 option[value=1]').hide();

//For Show
$('#selection1 option[value=1]').show();
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  • 耶瑟儿～
    2020-12-11 18:23

    Why are you messing around with display settings if you just want to remove the element?

    $('#1').remove();

    and its gone.

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  • 礼貌的吻别
    2020-12-11 18:23

    I suppose, your selector is wrong. Try something like this (updated): 

    <html>
    <head>
        <title>MooExample</title>
        <script type="text/javascript" src="jquery.js"></script>
        <script type="text/javascript">
            $(document).ready(function() {
                $("#click").click(function() {
                    $("#selection1 #1").remove();
                    //$("#selection1 > #1").toggle(); // Hide OR show
                });
            });
        </script>
    </head>

    <body>
        <select id="selection1">
            <option value="1" id="1">Number 1</option>
            <option value="2" id="2">Number 2</option>
            <option value="3" id="3">Number 3</option>
        </select>
        <input type="button" id="click" onclick="moo()" value="click" />
    </body>
</html>

    See parent-child selector (parent > child).

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