Select2

The jQuery replacement for select boxes

As of 2017-10-09. See the latest version.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Select2
// @namespace    https://select2.github.io/
// @version      0.8
// @description  The jQuery replacement for select boxes
// @author       t_liang
// @include      *:*
// @exclude      *://select2.github.io*
// @exclude      *://app.yinxiang.com*
// @exclude      *://www.instagram.com*
// @exclude      *://www.google.co*
// @exclude      *://*.tmall.com*
// @exclude      *://*.taobao.com*
// @grant        none
// ==/UserScript==

/*
History
    0.1 初始版本
    0.2 修复版本比较错误,versionMoreThan
    0.3 jQuery.noConflict(true)
    0.4 支持jQuery.ajax
    0.5 exclude app.yinxiang.com
    0.6 use setInterval
    0.7 config, setTimeout, zIndex
    0.8 templateResult matcher
*/

/*
(function(factory) {
    debugger;
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define([ 'jquery' ], factory);
    } else if (typeof exports === 'object') {
        // Node/CommonJS
        factory(require('jquery'));
    } else {
        // Browser globals
        factory(jQuery);
    }
})(console.log);
*/

// console.log(arguments);
setTimeout(function() {
    // config
    var config = {
        ignore : [ 'typeof Vue == "function"' ], //, 'typeof angular == "object"'
        jquery : {
            js : '//cdn.bootcss.com/jquery/3.2.1/jquery.min.js',
            moreThan : '1.6.2'
        },
        select2 : {
            js : '//cdn.bootcss.com/select2/4.0.3/js/select2.min.js',
            css : '//cdn.bootcss.com/select2/4.0.3/css/select2.min.css'
        },
        timeout : 3000,
        interval : 3000,
        minWidth : 147
    };
    // ignore
    for (var i = config.ignore.length - 1; i >= 0; i--) {
        if (eval(config.ignore[i])) {
            return;
        }
    }

    var noConflict,
        protocol = location.protocol == 'https:' ? 'https:' : 'http:',
        jQueryOnload = function() {
            jQuery(function($) {
                $.ajaxSetup({
                    cache : true
                });
                var select2Onload = function() {
                    noConflict && $.noConflict(true);
                    // console.log($.fn.select2, location.href);
                    if ($.isFunction($.fn.select2)) {
                        $(document.head).append('<link href="' + (protocol + config.select2.css) + '" rel="stylesheet">')
                            .append('<style>span.select2-dropdown{z-index:99999 !important;}</style>');
                        setInterval(function() {
                            // :enabled:not(.select2-hidden-accessible,[readonly])
                            $('select:not(.select2-hidden-accessible,[multiple])').filter(':visible').each(function() {
                                if (this.style.opacity === 0) {
                                    return true;
                                }
                                var $this = $(this),
                                    $options = $this.find('option');
                                $options.length > 1 && $this.select2({
                                    width : Math.max($this.width(), config.minWidth),
                                    dropdownAutoWidth : true,
                                    placeholder : $options.filter(':selected').text(), //for allowClear
                                    allowClear : true,
                                    templateResult : function(option, Eoption) {
                                        if (option.loading || !option.id) {
                                            return option.text;
                                        }
                                        return '[' + option.id + ']' + option.text;
                                    },
                                    matcher : function(params, option) {
                                        var term = $.trim(params.term).toUpperCase();
                                        if (!term || option.text.toUpperCase().indexOf(term) > -1 || option.id.toUpperCase().indexOf(term) > -1) {
                                            return option;
                                        }
                                        return null;
                                    }
                                });
                            });
                        }, config.interval);
                    }
                };
                $.isFunction($.fn.select2) ? select2Onload() : $.getScript(protocol + config.select2.js, select2Onload);
            });
        },
        /** 版本比较: 大于 */
        versionMoreThan = function(version, moreThan) {
            version = version.split('.');
            moreThan = moreThan.split('.');
            for (var i = 0; i < version.length; i++) {
                var moreThan_i = i < moreThan.length ? Number(moreThan[i]) : 0;
                if (version[i] > moreThan_i) {
                    return true;
                } else if (version[i] < moreThan_i) {
                    return false;
                }
            }
            return false;
        };

    // TODO enter
    if (typeof jQuery == 'function') {
        if (versionMoreThan(jQuery.fn.jquery, config.jquery.moreThan)) {
            jQueryOnload();
            return;
        }
    }
    // append jQuery
    noConflict = true;
    setTimeout(function() {
        var jQueryScript = document.createElement('SCRIPT');
        jQueryScript.src = protocol + config.jquery.js;
        jQueryScript.onload = jQueryOnload;
        document.head.appendChild(jQueryScript);
    }, config.timeout);
}, 3000);