js输入框邮箱自动提示功能代码实现(4)

// 鼠标移到某一项li上面时候
            self._itemHover(cfg.parentNode);

            // 点击对应的项时
            self._executeClick(cfg.parentNode);
        }

    },
    /**
     * 精确匹配某项内容
     */
    _accurateMate: function(cfg) {
        var self = this,
            _config = self.config,
            _cache = self.cache;

        var curVal = $.trim($(cfg.target,cfg.parentNode).attr('data-html')),
            newArrs = [];
        if(/@/.test(curVal)) {

            // 获得@ 前面 后面的值
            var prefix = curVal.replace(/@.*/, ""),
                suffix = curVal.replace(/.*@/, "");

$.map(_config.mailArr,function(n){
                var reg = new RegExp(suffix);
                if(reg.test(n)) {
                    newArrs.push(n);
                }
            });
            if(newArrs.length > 0) {
                $('.auto-tip',cfg.parentNode).html('');
                $(".auto-tip",cfg.parentNode) && $(".auto-tip",cfg.parentNode).hasClass('hidden') &&
                $(".auto-tip",cfg.parentNode).removeClass('hidden');

var html = '';
                for(var j = 0, jlen = newArrs.length; j < jlen; j++) {
                    html += '<li>'+'<span></span><em data-html="'+newArrs[j]+'">'+newArrs[j]+'</em></li>';
                }
                $('.auto-tip',cfg.parentNode).html(html);

                // 给所有li添加属性 data-html
                $('.auto-tip li',cfg.parentNode).each(function(index,item){
                    $('.output-num',item).html(prefix);
                    !$('.output-num',item).hasClass(_config.inputValColor) &&
                    $('.output-num',item).addClass(_config.inputValColor);

var emVal = $.trim($('.em',item).attr('data-html'));

                    $(item).attr('data-html','');
                    $(item).attr({'data-html':prefix + '' +emVal});
                });

// 精确匹配到某项时候 让当前的索引等于初始值
                _cache.currentIndex = -1;
                _cache.oldIndex = -1;

                $('.auto-tip .output-num',cfg.parentNode).html(prefix);

// 鼠标移到某一项li上面时候
                self._itemHover(cfg.parentNode);