


Title: jQuery implements dynamic changes in the display attribute value of elements
jQuery is a popular JavaScript library that is widely used in web development. During the front-end development process, we often encounter scenarios that require dynamic control of the display and hiding of elements. Among them, the display attribute value of the element is a commonly used attribute to control the display state of the element. This article will use specific code examples to demonstrate how to use jQuery to dynamically change the value of the display attribute of an element.
First, we need to introduce the jQuery library into the HTML page, which can be introduced through a CDN link or downloading a local file:
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
Next, let’s look at several common requirements and pass them through the code Example demonstrates how to use jQuery to dynamically change the value of the display attribute of an element:
1. Display element
<button id="showButton">显示元素</button> <div id="targetElement" style="display: none;">这是要显示的元素</div> <script> $(document).ready(function(){ $("#showButton").click(function(){ $("#targetElement").show(); }); }); </script>
In the above code example, when the button "Display Element" is clicked, through jQuery The show() method displays the div element with the id targetElement.
2. Hidden element
<button id="hideButton">隐藏元素</button> <div id="targetElement" style="display: block;">这是要隐藏的元素</div> <script> $(document).ready(function(){ $("#hideButton").click(function(){ $("#targetElement").hide(); }); }); </script>
In this example, when the button "Hide Element" is clicked, the div element with the id of targetElement is hidden through jQuery's hide() method.
3. Switch element display state
<button id="toggleButton">切换元素显示状态</button> <div id="targetElement" style="display: block;">这是可以切换显示状态的元素</div> <script> $(document).ready(function(){ $("#toggleButton").click(function(){ $("#targetElement").toggle(); }); }); </script>
When the "Switch element display state" button is clicked, the display state of the div element with the id of targetElement is switched through jQuery's toggle() method. If the element If it is currently hidden, it will be displayed and vice versa.
Through the above example, we can see how to use jQuery to dynamically change the value of the element's display attribute. jQuery provides a wealth of methods to control the display and hiding of elements, making front-end development more convenient and flexible. I hope these code examples can help readers better understand the application of jQuery and improve the efficiency and skills of front-end development.
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实现方法:1、用“$("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。

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。

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")”。

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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