Overview
A method that simulates hover events (the mouse moves over and out of an object). This is a custom method that provides a "keep in it" state for frequently used tasks.
When the mouse moves over a matching element, the specified first function will be triggered. When the mouse moves out of this element, the specified second function will be triggered. Moreover, it will be accompanied by detection of whether the mouse is still in a specific element (for example, an image in a div). If so, it will continue to remain in the "hover" state without triggering the move-out event (fixed use of mouseout A common mistake of events).
Parameters
over,outFunction,FunctionV1.0
over: The function to be triggered when the mouse moves over the element
out: The function to be triggered when the mouse moves out of the element Function
outObjectV1.4
Event function that is triggered when the mouse moves on or out of an element
Example
over,out Description:
MouseoverTableAdd specific class
jQuery Code:
$("td").hover( function () { $(this).addClass("hover"); }, function () { $(this).removeClass("hover"); } );
out Description:
Thehovre() method switches methods by binding the variable "handlerInOut".
jQuery code:
$("td").bind("mouseenter mouseleave",handlerInOut); $("td").hover(handlerInOut);
$("td").hover( function () { $(this).addClass("hover"); }, function () { $(this).removeClass("hover"); } ); <style type="text/css"> .hover {background:red}; </style>
The hover in the brackets in addClass("hover") and removeClass("hover") here only says hover, and there is no need to write anything else, right? The first answer to this
is, it doesn’t have to be hover.
The reason why hover is written in this addClass is because the name of the previous CSS class selector is hover (that is.hover {background:red};). This name can be changed to something else. Here’s a working code for you:
<html> <head> <title>hover demo</title> <script src="//code.jquery.com/jquery-1.10.2.js"></script> <style> .myStyle { background: red } ; </style> </head> <body> <table border="1"> <tr> <td>row 1, cell 1</td> <td>row 1, cell 2</td> </tr> <tr> <td>row 2, cell 1</td> <td>row 2, cell 2</td> </tr> </table> <script> $("td").hover(function() { $(this).addClass("myStyle"); }, function() { $(this).removeClass("myStyle"); }); </script> </body> </html>
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实现方法:1、用“$("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。

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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