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所有ajax执行完且页面加载完判断

巴扎黑

巴扎黑

发布时间:2017-07-03 11:03:33

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4004人浏览过

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来源于php中文网

原创

jquery ajax&load 方法导致 js效果不显示或显示后由于加载后ajax 重新布局页面导致效果错误。

解决思路:需要在ajax get post 或 load 等执行完后再去执行方法就不会由于他们没执行完导致的最终错误。

那么首先看load 方法定义:

jQuery ajax - load() 方法

jQuery Ajax 参考手册
实例

使用 AJAX 请求来改变 p 元素的文本:

$("button").click(function(){
  $("p").load('demo_ajax_load.txt');
});

亲自试一试

您可以在页面底部找到更多 TIY 实例
定义和用法

load() 方法通过 AJAX 请求从服务器加载数据,并把返回的数据放置到指定的元素中。

注释:还存在一个名为 load 的 jQuery 事件方法。调用哪个,取决于参数。
语法

load(url,data,function(response,status,xhr))

参数 	描述
url 	规定要将请求发送到哪个 URL。
data 	可选。规定连同请求发送到服务器的数据。
function(response,status,xhr) 	

可选。规定当请求完成时运行的函数。

额外的参数:

    response - 包含来自请求的结果数据
    status - 包含请求的状态("success", "notmodified", "error", "timeout" 或 "parsererror")
    xhr - 包含 XMLHttpRequest 对象

详细说明

该方法是最简单的从服务器获取数据的方法。它几乎与 $.get(url, data, success) 等价,不同的是它不是全局函数,并且它拥有隐式的回调函数。当侦测到成功的响应时(比如,当 textStatus 为 "success" 或 "notmodified" 时),.load() 将匹配元素的 HTML 内容设置为返回的数据。这意味着该方法的大多数使用会非常简单:

$("#result").load("ajax/test.html");

如果提供回调函数,则会在执行 post-processing 之后执行该函数:

$("#result").load("ajax/test.html", function() {
  alert("Load was performed.");
});

上面的两个例子中,如果当前文档不包含 "result" ID,则不会执行 .load() 方法。

如果提供的数据是对象,则使用 POST 方法;否则使用 GET 方法。
加载页面片段

.load() 方法,与 $.get() 不同,允许我们规定要插入的远程文档的某个部分。这一点是通过 url 参数的特殊语法实现的。如果该字符串中包含一个或多个空格,紧接第一个空格的字符串则是决定所加载内容的 jQuery 选择器。

我们可以修改上面的例子,这样就可以使用所获得文档的某部分:

$("#result").load("ajax/test.html #container");

如果执行该方法,则会取回 ajax/test.html 的内容,不过然后,jQuery 会解析被返回的文档,来查找带有容器 ID 的元素。该元素,连同其内容,会被插入带有结果 ID 的元素中,所取回文档的其余部分会被丢弃。

jQuery 使用浏览器的 .innerHTML 属性来解析被取回的文档,并把它插入当前文档。在此过程中,浏览器常会从文档中过滤掉元素,比如 ,  或 <head> 元素。结果是,由 .load() 取回的元素可能与由浏览器直接取回的文档不完全相同。

注释:由于浏览器安全方面的限制,大多数 "Ajax" 请求遵守同源策略;请求无法从不同的域、子域或协议成功地取回数据。
更多实例
例子 1

加载 feeds.html 文件内容:

$("#feeds").load("feeds.html");

例子 2

与上面的实例类似,但是以 POST 形式发送附加参数并在成功时显示信息:

$("#feeds").load("feeds.php", {limit: 25}, function(){
  alert("The last 25 entries in the feed have been loaded");
});

例子 3

加载文章侧边栏导航部分至一个无序列表:

HTML 代码:

<b>jQuery Links:</b>
<ul id="links"></ul>

jQuery 代码:

$("#links").load("/Main_Page #p-Getting-Started li");</pre><p><br>发现有个回调方法,那好啊 ,我在回调中写自己的方法就会在ajax之后执行了。于是乎:</p><pre class="html">$("#feeds").load("feeds.php", function(){
    fun();
});</pre><p>但是有个问题,如果是多个呢? 每个后面都加?而且还要判断此方法是否被执行过了。(。。。。。。。。。。)</p>
<p>于是乎:找个jquery自带的判断所有结束后再去执行就OK了,于是:</p><div class="aritcle_card flexRow">
							<div class="artcardd flexRow">
								<a class="aritcle_card_img" href="/xiazai/code/11037" title="Difeye-敏捷的轻量级PHP框架"><img
										src="https://img.php.cn/upload/webcode/000/000/001/176474889466892.jpg" alt="Difeye-敏捷的轻量级PHP框架"></a>
								<div class="aritcle_card_info flexColumn">
									<a href="/xiazai/code/11037" title="Difeye-敏捷的轻量级PHP框架">Difeye-敏捷的轻量级PHP框架</a>
									<p>Difeye是一款超轻量级PHP框架,主要特点有: Difeye是一款超轻量级PHP框架,主要特点有: ◆数据库连接做自动主从读写分离配置,适合单机和分布式站点部署; ◆支持Smarty模板机制,可灵活配置第三方缓存组件; ◆完全分离页面和动作,仿C#页面加载自动执行Page_Load入口函数; ◆支持mysql,mongodb等第三方数据库模块,支持读写分离,分布式部署; ◆增加后台管理开发示例</p>
								</div>
								<a href="/xiazai/code/11037" title="Difeye-敏捷的轻量级PHP框架" class="aritcle_card_btn flexRow flexcenter"><b></b><span>下载</span> </a>
							</div>
						</div><pre class="javascript">	$("p").ajaxStop(function(){
		if (hash && !isGlobalHash) {
			$("#MfTit"+hash).trigger("click");
			isGlobalHash = true;
		}
	});</pre><p>定义:<br><br></p>
<h2>实例</h2>
<p>当所有 AJAX 请求完成时,触发一个提示框:</p><pre class="brush:php;toolbar:false;">$("p").ajaxStop(function(){
  alert("所有 AJAX 请求已完成");
});</pre><p>当然 有 stop 就有 start.<br></p>					</div>
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