基于jQuery判断两个元素是否有重叠部分的代码

核心代码：


代码如下:

$("#result").text(isOverlap("one","two")+","+isOverlap("one","three")+","+isOverlap("two","three"));
function isOverlap(idOne,idTwo){
var objOne=$("#"+idOne),
objTwo=$("#"+idTwo),
offsetOne = objOne.offset(),
offsetTwo = objTwo.offset(),
topOne=offsetOne.top,
topTwo=offsetTwo.top,
leftOne=offsetOne.left,
leftTwo=offsetTwo.left,
widthOne = objOne.width(),
widthTwo = objTwo.width(),
heightOne = objOne.height(),
heightTwo = objTwo.height();
var leftTop = leftTwo > leftOne && leftTwo < leftOne+widthOne
&& topTwo > topOne && topTwo < topOne+heightOne,
rightTop = leftTwo+widthTwo > leftOne && leftTwo+widthTwo < leftOne+widthOne
&& topTwo > topOne && topTwo < topOne+heightOne,
leftBottom = leftTwo > leftOne && leftTwo < leftOne+widthOne
&& topTwo+heightTwo > topOne && topTwo+heightTwo < topOne+heightOne,
rightBottom = leftTwo+widthTwo > leftOne && leftTwo+widthTwo < leftOne+widthOne
&& topTwo+heightTwo > topOne && topTwo+heightTwo < topOne+heightOne;
return leftTop || rightTop || leftBottom || rightBottom;
}

原理很简单，就是判断一个元素的四个点是否在另一个元素内部。
完整演示代码：


代码如下:

JSCode
LoginResult JavaScript HTML CSS ALL Edit Share
$("#result").text(isOverlap("one","two")+","+isOverlap("one","three")+","+isOverlap("two","three"));
function isOverlap(idOne,idTwo){
var objOne=$("#"+idOne),
objTwo=$("#"+idTwo),
offsetOne = objOne.offset(),
offsetTwo = objTwo.offset(),
topOne=offsetOne.top,
topTwo=offsetTwo.top,
leftOne=offsetOne.left,
leftTwo=offsetTwo.left,
widthOne = objOne.width(),
widthTwo = objTwo.width(),
heightOne = objOne.height(),
heightTwo = objTwo.height();
var leftTop = leftTwo > leftOne && leftTwo < leftOne+widthOne
&& topTwo > topOne && topTwo < topOne+heightOne,
rightTop = leftTwo+widthTwo > leftOne && leftTwo+widthTwo < leftOne+widthOne
&& topTwo > topOne && topTwo < topOne+heightOne,
leftBottom = leftTwo > leftOne && leftTwo < leftOne+widthOne
&& topTwo+heightTwo > topOne && topTwo+heightTwo < topOne+heightOne,
rightBottom = leftTwo+widthTwo > leftOne && leftTwo+widthTwo < leftOne+widthOne
&& topTwo+heightTwo > topOne && topTwo+heightTwo < topOne+heightOne;
return leftTop || rightTop || leftBottom || rightBottom;
}
<div id="one">One</div>
<div id="two">Two</div>
<div id="three">Three</div>
<h1 id="result"></h1>
div{
width:200px;
height:200px;
background:#EEE;
}
#two{
position:absolute;
left:100px;
top:50px;
background:#F60;
}
DownLoad
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>JSCode demo</title>
<style type="text/css">
div{
width:200px;
height:200px;
background:#EEE;
}
#two{
position:absolute;
left:100px;
top:50px;
background:#F60;
}
</style>
<script src="/js_lib/jQuery-1.7.2.js" type="text/javascript"></script>
</head>
<body>
<div id="one">One</div>
<div id="two">Two</div>
<div id="three">Three</div>
<h1 id="result"></h1>
<script type="text/javascript">
$("#result").text(isOverlap("one","two")+","+isOverlap("one","three")+","+isOverlap("two","three"));
function isOverlap(idOne,idTwo){
var objOne=$("#"+idOne),
objTwo=$("#"+idTwo),
offsetOne = objOne.offset(),
offsetTwo = objTwo.offset(),
topOne=offsetOne.top,
topTwo=offsetTwo.top,
leftOne=offsetOne.left,
leftTwo=offsetTwo.left,
widthOne = objOne.width(),
widthTwo = objTwo.width(),
heightOne = objOne.height(),
heightTwo = objTwo.height();
var leftTop = leftTwo > leftOne && leftTwo < leftOne+widthOne
&& topTwo > topOne && topTwo < topOne+heightOne,
rightTop = leftTwo+widthTwo > leftOne && leftTwo+widthTwo < leftOne+widthOne
&& topTwo > topOne && topTwo < topOne+heightOne,
leftBottom = leftTwo > leftOne && leftTwo < leftOne+widthOne
&& topTwo+heightTwo > topOne && topTwo+heightTwo < topOne+heightOne,
rightBottom = leftTwo+widthTwo > leftOne && leftTwo+widthTwo < leftOne+widthOne
&& topTwo+heightTwo > topOne && topTwo+heightTwo < topOne+heightOne;
return leftTop || rightTop || leftBottom || rightBottom;
}
</script>
</body>
</html>
Share link
Embed on your page
Share on Sina
Share on QQ

作者：Artwl

赞 (0)

相关推荐

  • 基于jQuery判断两个元素是否有重叠部分的代码

    核心代码: 复制代码 代码如下: $("#result").text(isOverlap("one","two")+","+isOverlap("one","three")+","+isOverlap("two","three")); function isOverlap(idOne,idTwo){ var objOne=$(&

  • 基于JQUERY的两个ListBox子项互相调整的实现代码

    HTML: 复制代码 代码如下: <div id="divObj3" class="divContent"> <input id="hidColorSelect" name="ColorSelect" type="hidden" value="3,5,6,11,12,13,14" /> <table style="width: 100%; text

  • 基于JavaScript判断两个对象内容是否相等

    这篇文章主要介绍了基于JavaScript判断两个对象内容是否相等,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下 ES6中有一个方法判断两个对象是否相等,这个方法判断是两个对象引用地址是否一致 let obj1= { a: 1 } let obj2 = { a: 1 } console.log(Object.is(obj1, obj2)) // false let obj3 = obj1 console.log(Object.is(obj1,

  • 基于jQuery实现弹出可关闭遮罩提示框实例代码

    基于jQuery实现弹出可关闭遮罩提示框实例代码

    jquery CSS3遮罩弹出层动画效果,使用非常简单,就两个标签,里面自定义内容和样式,四种常见效果,懂的朋友还可以修改源代码修改成自己想要的效果 先给大家展示下效果图,如果大家感觉还不错,请参考实现代码. 效果演示 关键代码如下所示: <!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8&quo

  • 基于jQuery实现仿百度首页换肤背景图片切换代码

    基于jQuery实现仿百度首页换肤背景图片切换代码

    不多说了,先给大家展示效果图,本文支持源码下载哦,需要的朋友可以直接下载使用,代码很简单哦- 在线预览    源码下载 html代码: <a href="#">换肤</a> <div class="heitiao"></div> <div class="con"><img src="images/content.png" /></div> &l

  • jquery设置表单元素为不可用的简单代码

    本章节通过简单的实例代码介绍一下如何将表单元素设置为不可用状态. 代码实例如下: <!DOCTYPE html> <html> <head> <meta charset=" utf-8"> <meta name="author" content="http://www.jb51.net/" /> <title>我们</title> <script type=

  • jQuery实现两款有动画功能的导航菜单代码

    jQuery实现两款有动画功能的导航菜单代码

    本文实例讲述了jQuery实现两款有动画功能的导航菜单代码.分享给大家供大家参考.具体如下: 这里介绍两个有动画功能的jQuery导航菜单,每个具备移动背景的效果,第二则是渐变背景效果,两个都不错,根据你的喜好选择了,菜单的风格和颜色自己修改一下就能用了. 运行效果截图如下: 在线演示地址如下: http://demo.jb51.net/js/2015/jquery-2-animate-style-nav-menu-codes/ 具体代码如下: <!DOCTYPE html PUBLIC "

  • Javascript 判断两个IP是否在同一网段实例代码

    Javascript 判断两个IP是否在同一网段 以下脚本不做IP格式的判断,只判断两个IP是否在同一网段. 例子,Javascript判断两个IP是否在同一网段. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <TITLE> IP段信息检测_www.manongjc.com </TITLE> <script la

  • java 判断两个对象是否为同一个对象实例代码

    java 判断两个对象是否为同一个对象 用"=="比较的是引用的地址,用equals比较的就是值.那我们new两个相同的对象什么属性都一样,为什么编译的时候不相同,这是因为我们调用的是父类也就是Object的equals方法,这里我们就需要重写这个equals方法. public class Test5 { public static void main(String[] args) { User mUser1 = new User("zhangsan", &quo

  • jQuery判断iframe中元素是否存在的方法

    复制代码 代码如下: if($(window.frames["iframepage"].document).find('.l-grid-row-cell').length > 0){ alert(1);}else{ alert(2);} 判断id为iframepage的iframe中css为1-grid-row-cell的元素是否存在

随机推荐