


The example in this article describes the jquery method of displaying a prompt box when the mouse slides over it. Share it with everyone for your reference. The details are as follows:
1. Example of jquery prompt box displayed when the mouse slides over
1. Rendering
2. Implementation code (you need to add jquery.js, button images, and prompt box images by yourself)
HTML code
2. Example 2 of jquery prompt box displayed when the mouse slides over
When the mouse moves over the user name, a div will be displayed in the lower right corner of the mouse to display the user information
1. Rendering
2. Implementation method
There are only three big parts. One is the positioning of the div, which is the main difficulty of the effect; the second is asynchronous loading of data through ajax; the third is to use the two js attributes onmouseover and onmouseout, that is, when the mouse passes and mouse away.
3. Implementation steps
(1) First, design the style of the div to display user information. What should be noted here is that this method is not to bind a div next to each user name. It will be displayed when the mouse passes over it and hidden when the mouse leaves. There is only one div in the web page that displays information. It is positioned wherever it needs to be displayed. To do this, you need to set the positioning method of the div to absolute positioning.
HTML code:

(2)、相应css代码
width:380px;
height:160px;
float:left;
display:none;
border: 1px solid #ccc; position: absolute; z-index: 1; opacity: 0.1; background: white
}
.pic{
width:100px;
height:100px;
border:1px solid #ccc;
border-radius:10px;
float:left; margin:10px;
overflow:hidden;
}
.box{
width:240px;
height:140px;
margin:10px 0 10px 10px;
float:left;
overflow:hidden;text-overflow:ellipsis; white-space:nowrap;}
(3)、定位,为了能够精确的定位并且能够方便的调用,所以先在页面中放了两个标签,分别用于保存当前鼠标的坐标
然后用js获取当前坐标并保存到标签中:
$(document).mousemove(function (e) {
document.getElementById("pagex").value = e.pageX;//pageX() 属性是鼠标指针的位置,相对于文档的左边缘。
document.getElementById("pagey").value = e.pageY;//pageY() 属性是鼠标指针的位置,相对于文档的上边缘。
});
});
(4)、鼠标经过和离开事件js代码
$("#blockdiv").css({
"display": "block",
"left": document.getElementById('pagex').value,
"top": document.getElementById('pagey').value,
});
$("#messagediv").css("display", "block");
$.getJSON("../ashx/GetUserInfo。ashx?name=" username,
function (data) {
if (data != null) {
$("#lblusername").html(data[0].User_Count)
$("#lblrealname").html(data[0].User_name);
$("#sex").html(data[0].User_Sex);
$("#lbladdress").html(data[0].User_Address)
$("#lblemall").html(data[0].User_Email);
if (data[0].User_HeadImg != null&&data[0].User_HeadImg != "") {
$("#imguserhead").attr("src", "../../Users/" data[0].User_HeadImg.toString().substring(3));
}
else {
$("#imguserhead").attr("src", "../../Users/images/900.png");
}
$("#messagediv").css("display", "none");
}
else
$("#messagediv").html("未加载到数据!");
});
}
function HiddenInfo() {
$("#blockdiv").css({
"display": "none",
});
$("#lblusername").html("")
$("#lblrealname").html("");
$("#sex").html("");
$("#lbladdress").html("")
$("#lblemall").html("");
}
(5)、调用
希望本文所述对大家的jQuery程序设计有所帮助。

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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