fixed | 易学教程

Sticky sidebar: stick to bottom when scrolling down, top when scrolling up

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问题 I have been looking for some time now for a solution to my sticky sidebar problem. I have a specific idea of how I would like it to act; effectively, I would like it to stick to the bottom as you scroll down, and then as soon as you scroll back up I would like it to stick to the top, in a fluid motion (no jumping). I am unable to find an example of what I am trying to achieve, so I have created an image that I hope will illustrate the point clearer: Sidebar sits under the header. As you

What is the overhead of C# fixed statement on a managed unsafe struct containing fixed arrays?

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I've been trying to determine what the true cost of using the fixed statement within C# for managed unsafe structs that contain fixed arrays. Please note I am not referring to unmanaged structs. Specifically, is there any reason to avoid the pattern shown by 'MultipleFixed' class below? Is the cost of simply fixing the data non zero, near zero (== cost similar to setting & clearing a single flag when entering/exiting the fixed scope), or is it significant enough to avoid when possible? Obviously these classes are contrived to help explain the question. This is for a high usage data structure

Centering a fixed element, but scroll it horizontally

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问题 Having some issues getting this to work. PLEEEEEEASE help. I would like an element fixed to the top of the viewport, when the user scrolls down the page it remains at the top of the viewport... easy. If the window is narrower then 960px the horizontal scrollbars appear. If the window is scrolled horizontally I would like the content inside this fixed element to scroll with it. Please check out the demo, the two green boxes should always line up. Make your window narrow and scroll horiz,

Fixed positioned div within a relative parent div

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I am currently building a responsive website and need a menu to be fixed, thus not scrolling when the rest of the site scrolls. the issue is that it is a fluid layout and i want the "fixed positioned" menu item to be fixed relative to the containing parent element and not to browser window. is there anyway this can be done? This question came first on Google although an old one so I'm posting the working answer I found, which can be of use to someone else. This requires 3 divs including the fixed div. HTML <div class="wrapper"> <div class="parent"> <div class="child"></div> </div> </div> CSS

background-attachment

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在CSS中background-attachment属性指定相对视口如何移动背景。有三个值：scroll、fixed和local。解释它们区别最好的方式就是通过演示(尝试滚动单个背景)： <h2><code>scroll (default)</code></h2> <div class="scroll"> <div class="expand"></div> </div> <h2><code>fixed</code></h2> <div class="fixed"> <div class="expand"></div> </div> <h2><code>local</code></h2> <div class="local"> <div class="expand"></div> </div> <br class="extra-space"> 　　 h2 { text-align: center; margin-top: 48px; } div { height: 200px; width: 50%; max-width: 600px; margin: 32px auto; overflow-x: hidden; overflow-y: scroll; } .scroll { background: url('./images/dog.jpg'); background

How can I make a fixed positioned div inherit width of parent?

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问题 Is there a way a fixed positioned div can inherit the width of a parent? I know fixed width is relative to the window's so this code doesn't work: #wrapper{ position: relative; width:500px; height: 20px; background-color: blue; } #header{ position: fixed; width: 100%; height: 20px; background-color: rgba(255,0,0,0.5); } <div id="wrapper"> #wrapper <div id="header"> #header </div> </div> 回答1: Use the inherit value for the width property on the #header selector. Why This Works By specifying

.net core mvc中input保留两位小数

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本篇介绍：如何在mvc中使用html标签保留两位小数你需要知道： @html标签的使用： https://blog.csdn.net/pasic/article/details/7093802 js正则参考： https://blog.csdn.net/xinghuo0007/article/details/72675105 前端:Layui ①创建页面 Shared创建文件夹EditorTemplates（必须的，自定义都需要放到此目录下），然后添加Razor视图，命名为Number 　具体代码如下： @using System.ComponentModel.DataAnnotations; @using System.Reflection; @{ //Html.DisplayNameForModel(): [Display(Name = "xx")] //ViewData.TemplateInfo.HtmlFieldPrefix: @Html.EditorFor(model => model.DJ, new { Fixed = 2 }) //保留的小数传递的参数 int Fixed = ViewData["Fixed"] == null ? 2 : (int)ViewData["Fixed"]; //是否非空 bool readOnly = false; readOnly

Vue实现移动端页面切换效果

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找了好多博客实现效果都……emmm…… 应用Vue自带的过渡《进入/离开 & 列表过渡》和嵌套路由和 fixed定位实现其实还是挺简单的。在子页面把整个页面做绝对定位，覆盖整个屏幕，子父页面将 router-view 用 transition 套起来，并加上过渡动画就可以啦。代码： <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no"> <title>Document</title> <style> * { padding: 0; margin: 0; } html, body, #app { width: 100%; height: 100%; } .one { height: 100%; background-color: yellow; } .two { background-color: tomato; position: fixed; top: 0; bottom: 0; left: 0; right: 0; } .three {

web前端入门到实战：CSS最容易出错的两大地方

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css大家都很熟悉了，这里就不多介绍了。主要介绍一下两个在日常操作css最容易出错的地方。 margin-top 与 padding-top 这两个属性大家都很熟悉了，margin-top表示外部的上边距，padding-top表示内部的上边距。取值可以是一个具体的值或者一个百分比，如： margin-top: 10px; margin-top: 10%; padding-top: 20px; margin-top: 20%; 当取值为具体的值时，没有什么好说的。当取值为百分比时，需要特别注意：百分比不是相对于父元素的高度的，而是相对于父元素的宽度的。直接看例子：用处：可以用来在页面中显示固定宽高比的图片。注意： height 、 top 的百分比取值，总是相对于父元素的高度。这里提一下，w3cSchool中文站中，关于 margtin-top 的描述是错误的。地址在这里： http://www.w3school.com.cn/css/pr_margin-top.asp position: fixed 一提到position:fixed，自然而然就会想到：相对于浏览器窗口进行定位。但其实这是不准确的。如果说父元素设置了transform，那么设置了position:fixed的元素将相对于父元素定位，否则，相对于浏览器窗口进行定位。看例子：给

Tableau 指定维度聚合FIXED

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为了计算各类别中子类别销售额总和的平均值, 用来平均值判断 step1 : 添加一个计算字段 { FIXED [类别]:AVG({FIXED [子类别]:SUM([销售额])})} step2 : 拖拽至度量值来源： https://www.cnblogs.com/liuyuanq/p/11376771.html