(function () {
var showMoreNChildren = function ($children, n) {
//显示某jquery元素下的前n个隐藏的子元素
var $hiddenChildren = $children.filter(":hidden");
var cnt = $hiddenChildren.length;
for ( var i = 0; i < n && i < cnt ; i++) {
$hiddenChildren.eq(i).slideDown();
}
return cnt-n;//返回还剩余的隐藏子元素的数量
}
//对页中现有的class=showMorehandle的元素,在之后添加显示更多条,并绑定点击行为
$.showMore = function (selector) {
if (selector == undefined) { selector = ".showMoreNChildren" }
$(selector).each(function () {
var pagesize = $(this).attr("pagesize") || 10;
console.log(pagesize);
$(this).find("li:lt("+pagesize+")").show();
var $children = $(this).children();
if ($children.length > pagesize) {
for (var i = pagesize; i < $children.length; i++) {
$children.eq(i).hide();
}
$("<div class='showMorehandle'>显示更多</div>").insertAfter($(this)).click(function () {
if (showMoreNChildren($children, pagesize) <= 0) {
//如果目标元素已经没有隐藏的子元素了,就隐藏“点击更多的按钮条”
$(this).hide();
};
});
}
});
}
})() //调用显示更多插件
$.showMore(".showMoreNChildren,.mynews");
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