bootstrap的导航改造

时间:2023-11-26 13:32:44

在使用bootstrap制作后台时用到了响应式导航条,其中dropdown组件更是用的比较多,用的多需要点击的就多,dropdown默认鼠标左键单击才展开,如果使用鼠标放上去(hover)就展开则会省去点击时间,这样能提高效率。

原本的改造思路是:给dropdown元素绑定hover事件,hover上去的时候,执行该元素的click事件——即把hover同步为clickhover即为click

但想到与其自己来改造,不如先在网上搜索搜索看看有没有现成的插件,果不其然就搜索到了,托管在github上的代码网址:查看

在这儿就直接把代码复制出来:

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/*
 * 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.
 *
 */
;(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);

可以看到作者在插件前面加了个分号;,增加了插件的兼容性,因为可能上一个js代码没写;,如果在此不加分号则可能因为没换行导致js出错。

插件支持HTML元素data-*传参,也支持初始化传参。将此js代码放在bootstrap原本的js代码后面执行即可。