ABROAD:bootstrap中的dropdown組件改造click爲hover

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在使用bootstrap製做後臺時用到了響應式導航條,其中dropdown組件更是用的比較多,用的多須要點擊的就多,dropdown默認鼠標左鍵單擊才展開,若是使用鼠標放上去(hover)就展開則會省去點擊時間,這樣能提升效率。 javascript

本來的改造思路是:給dropdown元素綁定hover事件,hover上去的時候,執行該元素的click事件——即把hover同步爲clickhover即爲clickhtml

但想到與其本身來改造,不如先在網上搜索搜索看看有沒有現成的插件,果不其然就搜索到了,託管在github上的代碼網址:查看 java

在這兒就直接把代碼複製出來: git

/*
 * Project: Twitter Bootstrap Hover Dropdown
 * Author: Cameron Spear
 * Contributors: Mattia Larentis
 *
 * Dependencies?: Twitter Bootstrap's Dropdown plugin
 *
 * A simple plugin to enable twitter bootstrap dropdowns to active on hover and provide a nice user experience.
 *
 * No license, do what you want. I'd love credit or a shoutout, though.
 *
 * http://cameronspear.com/blog/twitter-bootstrap-dropdown-on-hover-plugin/
 */
;(function($, window, undefined) {
    // outside the scope of the jQuery plugin to
    // keep track of all dropdowns
    var $allDropdowns = $();

    // if instantlyCloseOthers is true, then it will instantly
    // shut other nav items when a new one is hovered over
    $.fn.dropdownHover = function(options) {

        // the element we really care about
        // is the dropdown-toggle's parent
        $allDropdowns = $allDropdowns.add(this.parent());

        return this.each(function() {
            var $this = $(this).parent(),
                defaults = {
                    delay: 500,
                    instantlyCloseOthers: true
                },
                data = {
                    delay: $(this).data('delay'),
                    instantlyCloseOthers: $(this).data('close-others')
                },
                options = $.extend(true, {}, defaults, options, data),
                timeout;

            $this.hover(function() {
                if(options.instantlyCloseOthers === true)
                    $allDropdowns.removeClass('open');

                window.clearTimeout(timeout);
                $(this).addClass('open');
            }, function() {
                timeout = window.setTimeout(function() {
                    $this.removeClass('open');
                }, options.delay);
            });
        });
    };

    $('[data-hover="dropdown"]').dropdownHover();
})(jQuery, this);

能夠看到做者在插件前面加了個分號;,增長了插件的兼容性,由於可能上一個js代碼沒寫;,若是在此不加分號則可能由於沒換行致使js出錯。 github

插件支持HTML元素data-*傳參,也支持初始化傳參。將此js代碼放在bootstrap本來的js代碼後面執行便可。 bootstrap

文章同步自:大超超在思考segmentfault

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