I happened to be responsible for the development of a visual editor recently, in which JQuery's custom events were conveniently applied in some places, and achieved good results - streamlining the code while making full use of OO principles.
This article uses an example I encountered in the actual application development process to further explain "When to use JQuery's custom events and how to use them". I hope it can inspire others and at the same time, it can be used as a reply to classmates' emails.
Demo-Ingenious JQuery custom event
JQuery best practice-exquisite custom event
Question: How can you easily trigger the processing logic of its click event for a checkbox X, but Without changing its current selected state?
Answer: Use a custom event handling function to encapsulate the processing logic of the check box click event! Then trigger the custom event.
Have you ever encountered the following application scenarios?
Requirement: For a certain container A, can the user set the presence or absence of its four borders and the border color? "Presence of border" and "change of color" need to be linked.
That is to say, when changing the border, the currently set color is obtained, and when the color is changed, the currently set border is obtained, and reflected in container A in time.
Note: In this example, the border colors are set uniformly. You can write down examples of separate settings~
Core code:
Border setting:
上
bottom
left

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。

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。

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。


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