position | 易学教程

Keep fixed position inside an iframe relative to the whole screen

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问题 Context: We're serving our app through an iframe inside our clients websites The iframe is seamless and scrolling happens only in the parent div right now. One of the Divs in our app has a fixed position and should always be present, no matter how much you scroll. Update: We deploy a javacript script next to the iframe, so we have access to the hosting page The problem: When served inside the iframe, the fixed position Div doesn't seem to retain its fixed position relatively to the whole

Kotlin 高阶函数? 自定义listener?

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面试中被问到，使用kotlin的时候，如何实现监听，例如点击事件：首先，平常开发中，Kotlin在使用期间，我们的习惯是使用已经熟悉的事务，初次听到这个的时候，有一些懵，回答说，正常写一个interface,传一个position:Int?，一个any:Any?，实际上，这样的listener已经能面对很多情况下的监听了，当然面试官需要的不是这样的答案，所以，被问到，有没有用到过invoke来实现监听？没有！！！回程后查阅资料，大部分写的是「Kotlin自定义监听」以下为基本代码，正常的RecyclerView中的Adapter： import android . content . Context import android . view . LayoutInflater import android . view . View import android . view . ViewGroup import androidx . recyclerview . widget . RecyclerView import com . qiufeng . myapplication . R import kotlinx . android . synthetic . main . item_main . view . * class MainItemAdapter (

后台管理页面1

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1. html:标签 2.CSS： position background text-align margin padding font-size z-index overflow hover opacity float(clear:both) line-height border color display 页面布局：后台管理布局： position: 　　fixed 　　relative 　　absolute 1. .left{ float:left; 因为float经常用，所以可以给它写一个样式，然后在下面直接应用这个样式就可以了。 2. 父亲定义了高度/宽度以后，里面的div才可以用%的形式来定义高度/宽度，定义的时候是以父亲div为标准的。现在的问题就卡在怎么样设置高度上了。是猜一下页面高度呢，还是设置100%呢（实际上无效）。 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> body{ margin:0; } .pg-header{ height:48px; background-color:#2459a2; color:white; } .pg-content .menu{ width:20%; background-color

后台管理页面布局

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1 <!DOCTYPE html> 2  3 <html lang="en"> 4 <head> 5 <meta charset="UTF-8"> 6 <title>Title</title> 7 <style> 8 body{ 9 margin: 0; 10 } 11 .left{ 12 float: left; 13 } 14 .right{ 15 float: right; 16 } 17 .pg-header{ 18 height:48px; 19 background-color: #2459a2; 20 color: white; 21 } 22 .pg-content .menu{ 23 width:20%; 24 background-color: red; 25 min-width: 200px; 26 height:500px; 27 } 28 .pg-content .content{ 29 width:80%; 30 background-color: green; 31 } 32 </style> 33 </head> 34 <body> 35 <div class="pg-header"></div> 36 <div class="pg-content"> 37 <div class="menu left">a</div>

how do I properly position & scale these elements in CSS?

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问题 I've been able to properly position & scale a few elements in my webpage using html & css, however due to the rules of positioning, I've gotten stuck on how to continue this action with two more elements. The chevron icon in the picture must be below the last paragraph entitled "scroll down", & I also want it to scale with the screen size as I have been successfully able to do with the other text/elements as you can see: here is the html: <!DOCTYPE html> <html> <head> <title>myWebpage</title>

前端常用的CSS代码

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（非原创）： demo演示 1、垂直居中对齐 .vc { position : absolute ; top : 50% ; left : 50% ; transform : translate ( -50%, -50% ) ; } .vc { position : absolute ; top : 50% ; left : 50% ; width : 100px ; height : 100px ; margin : -50px 0 -50px ; } ``````css 在这里插入代码片 2、全屏显示 html, body { position : fixed ; width : 100% ; height : 100% ; } div { height : 100% ; } 3、不同a标签链接使用不同样式 // link a [ href ^ = "http://" ] { background: url ( link . gif ) no-repeat center right ; } / / emails a [ href ^ = "mailto:" ] { background: url ( email . png ) no-repeat center right ; } / / pdfs a [ href$ = ".pdf" ] { background: url (

keep an absolutely positioned element in viewport (jquery)

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问题 I am working on a site now with a lot of tooltips. I want to ensure that the tooltips will always show up fully in the viewport. I know there are plugins for tooltips, but they won't work for me because the tooltip-ing is done via css (and I can't go change all of them!). Any element that you want to get a tooltip is given a position:relative, and is immediately followed by an element with class='tooltip' - here is the css code: .tooltip{ display:none; color: #262626; background-color:

CSS background-position fixed to parent

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问题 my question is a bit tricky and I'm not really sure if it is possible, but I think I have a memory of doing it before or seeing it somewhere. So, I am making a horisontal menu. I have a div block of size 980x36px. It has a background image: Inside I have links <a href="/">text</a> ) which I made block elements ( display: block; ) and floated left. So now it would look more like this: Now I want all active links and all links that are mouse-overed to have a different background, like this: The

Position form above the clicked notify icon

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问题 Is there a way to position a form just above the clicked Notify Icon in windows 7 and windows Vista? 回答1: Regarding your comment: "how could i know how is the taskbar positioned?" Check out the following article which contains a class which exposes a method for retrieving a Rectangle Structure for the tray: [c#] NotifyIcon - Detect MouseOut Using this class you can retrieve the Rectangle Structure for the tray like so: Rectangle trayRectangle = WinAPI.GetTrayRectangle(); Which will provide

jquery中offset（），position()

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position（） body{ position: relative;}div{width:200px;height: 200px;background-color: #bce8f1;position: relative;left:200px;} var left= $("span").position().left;var right= $("span").position().top; console.log("position_left:"+left);console.log("position_top:"+right); 定义和用法 position() 方法返回第一个匹配元素的位置（相对于它的父元素）。该方法返回一个带有两个属性（以像素为单位的 top 和 left 位置）的对象。 offset（） offset() 方法设置或返回被选元素相对于文档的偏移坐标 1、当用于返回偏移时：该方法返回第一个匹配元素的偏移坐标，它返回一个带有2个属性( 以像素为单位的 top 和 left 位置) 的对象 2、当用于设置偏移时：该方法设置所有匹配元素的偏移坐标，注意： offset() ，position（）方法返回的top , left. 跟 margin-top,margin-left 也有关系。如果元素有margin-top,margin-left.

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