This time I will bring you jQuery implementation of drop-down menu navigation. What are the precautions for jQuery implementation of drop-down menu navigation? The following is a practical case, let’s take a look.
This article mainly introduces jQuery to implement a simple drop-down menu navigation function, involving jQuery's operation skills related to page element traversal and node modification. Friends in need can refer to the following
Examples of this article Use jQuery to implement simple drop-down menu navigation function. Share it with everyone for your reference, the details are as follows:
The specific code is as follows:
nbsp;html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <meta> <title>www.jQuery导航</title> <style> #menu{width:300px;margin-left:auto;margin-right:auto;}.has_children{background:#555;color:#fff;cursor:pointer;}.highlight{color:#fff;background:green;} p{padding:0;} p a{background:#888;display:none;float:left;width:300px;} </style> <!-- 引入 jQuery --> <script></script> <script> //等待dom元素加载完毕. $(document).ready(function(){ $(".has_children").click(function(){ $(this).addClass("highlight") //为当前元素增加highlight类 .children("a").show().end() //将子节点的a元素显示出来并重新定位到上次操作的元素 .siblings().removeClass("highlight") //获取元素的兄弟元素,并去掉他们的highlight类 .children("a").hide(); //将兄弟元素下的a元素隐藏 }); }); </script> <p> </p><p> <span>第1章-认识jQuery</span> <a>1.1-JavaScript和JavaScript库</a> <a>1.2-加入jQuery</a> <a>1.3-编写简单jQuery代码</a> <a>1.4-jQuery对象和DOM对象</a> <a>1.5-解决jQuery和其它库的冲突</a> <a>1.6-jQuery开发工具和插件</a> <a>1.7-小结</a> </p> <p> <span>第2章-jQuery选择器</span> <a>2.1-jQuery选择器是什么</a> <a>2.2-jQuery选择器的优势</a> <a>2.3-jQuery选择器</a> <a>2.4-应用jQuery改写示例</a> <a>2.5-选择器中的一些注意事项</a> <a>2.6-案例研究——类似淘宝网品牌列表的效果</a> <a>2.7-还有其它选择器么?</a> <a>2.8-小结</a> </p> <p> <span>第3章-jQuery中的DOM操作</span> <a>3.1-DOM操作的分类</a> <a>3.2-jQuery中的DOM操作</a> <a>3.3-案例研究——某网站超链接和图片提示效果</a> <a>3.4-小结</a> </p>
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
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How to use webpack to write jquery environment configuration
How does jQuery’s Validate plug-in verify the input value
How to automatically convert uppercase and lowercase letters when jackson parses a json string
Usage of jQuery EasyUI accordion panel
The above is the detailed content of jQuery implements drop-down menu navigation. For more information, please follow other related articles on the PHP Chinese website!

实现方法:1、用“$("img").delay(毫秒数).fadeOut()”语句,delay()设置延迟秒数;2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句,通过定时器来延迟。

修改方法:1、用css()设置新样式,语法“$(元素).css("min-height","新值")”;2、用attr(),通过设置style属性来添加新样式,语法“$(元素).attr("style","min-height:新值")”。

区别:1、axios是一个异步请求框架,用于封装底层的XMLHttpRequest,而jquery是一个JavaScript库,只是顺便封装了dom操作;2、axios是基于承诺对象的,可以用承诺对象中的方法,而jquery不基于承诺对象。

增加元素的方法:1、用append(),语法“$("body").append(新元素)”,可向body内部的末尾处增加元素;2、用prepend(),语法“$("body").prepend(新元素)”,可向body内部的开始处增加元素。

在jquery中,apply()方法用于改变this指向,使用另一个对象替换当前对象,是应用某一对象的一个方法,语法为“apply(thisobj,[argarray])”;参数argarray表示的是以数组的形式进行传递。

删除方法:1、用empty(),语法“$("div").empty();”,可删除所有子节点和内容;2、用children()和remove(),语法“$("div").children().remove();”,只删除子元素,不删除内容。

on()方法有4个参数:1、第一个参数不可省略,规定要从被选元素添加的一个或多个事件或命名空间;2、第二个参数可省略,规定元素的事件处理程序;3、第三个参数可省略,规定传递到函数的额外数据;4、第四个参数可省略,规定当事件发生时运行的函数。

去掉方法:1、用“$(selector).removeAttr("readonly")”语句删除readonly属性;2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。


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