position | 易学教程

Position absolute and margin: auto

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I've got a small problem, I want my footer to stay at the bottom of the screen with position: absolute . But my margin: auto to put it in the middle of the screen isn't working anymore. html: <!DOCTYPE html> <html> <head> <meta http-equiv='Content-Type' content='Type=text/html; charset=utf-8'> <link rel="shortcut icon" href="../IMAGES/favicon.ico"> <title>TEST</title> <link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'> <link rel="stylesheet" href="../css/stylesheet.css"> </head> <body> <div id="header"> <div id="logo"> <img src="../IMAGES/logo

Google Maps loading strangely

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问题 I'm using the Google Maps API (v3) on my website to show a map centered in a certain position. This is my code: <script type="text/javascript"> $(document).ready(function() { var latlng = new google.maps.LatLng(-22.924484, -43.208001); var map = new google.maps.Map(document.getElementById("map-property2"), { zoom: 13, center: latlng, mapTypeId: google.maps.MapTypeId.ROADMAP }); }); </script> At the end of my <head> I have: <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />

Page Scroll under position: fixed content [closed]

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问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I have a top navigation area with position: fixed I'd like the page content to scroll normally, but not disappear under the navigation. The main issue is when I do a search, (this is a full CMS with hundreds of

How do i center the heading in my form heading?

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问题 I am using the center tag to center a heading in my form, "Please register your details". It works perfectly like I want it to but it fails the validation. Does any one else know what I could use? <form method = "post" action = "mailto:info@ncirl.ie"> <fieldset> <legend><center><b>Please Register Your Details</b></center></legend> 回答1: Instead of using <center> which will force your design to be centered forever, you should deal with it in CSS: form legend { text-align:center;font-weight:bold

关于GLSL的gl_FragCoord、gl_FragDepth以及深度计算

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gl_FragCoord和gl_FragDepth分别是片元着色器的输入和输出变量。 gl_FragCoord是个vec4，四个分量分别对应x, y, z和1/w。其中，x和y是当前片元的窗口相对坐标，不过它们不是整数，小数部分恒为0.5。x - 0.5和y - 0.5分别位于[0, windowWidth - 1]和[0, windowHeight - 1]内。windowWidth和windowHeight都以像素为单位，亦即用glViewPort指定的宽高。w即为乘过了投影矩阵之后点坐标的w，用于perspective divide的那个值。gl_FragCoord.z / gl_FragCoord.w可以得到当前片元和camera之间的距离。参见Fog in GLSL page 4。 gl_FragCoord.z是固定管线计算出的当前片元的深度。它已经考虑了多边形偏移，并经过了投影变换。它位于[0.0, 1.0]之间。如果用gl_FragColor = vec4(vec3(gl_FragCoord.z), 1.0)将其可视化，多半会看到一片白。这是由于变换的非线性，大多数点的深度都非常接近于1。用gl_FragColor = vec4(vec3(pow(gl_FragColor.z, exp)), 1.0)并将exp取为合适的值，就能看到从黑到白的深度变化了

CSS: “right” property refuse to apply?

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问题 This is driving me crazy! I have two divs, right after the body tag. They are both absolute positioned and sized. They both have the same "left" property, but i later declare the "right" property for the second div (so "left" should be ignored!). Here's the HTML: <body> <div class="previousPageButton"></div> <div class="nextPageButton"></div> And the CSS: (There's more code to it but it's commented out so it's irrelevant.) .previousPageButton, .nextPageButton { position: absolute; top: 0px;

C#快速入门指南

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<!doctype html> <html> <head> <meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'> <title>RSMX</title><style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; } html { font-size: 14px; background-color: var(--bg-color); color: var(--text-color); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; } body { margin: 0px; padding: 0px; height:

css position with percent

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I have a problem with position divs relative in an other div. I want to make a div that is position in the horizontal middle of the screen and in this div I want to place 3 other div with the same height. But all of them should be responsive. A picture says more than words :) <div id="zwrapper"> <div id="z1" class="row"></div> <div id="z2" class="row"></div> <div id="z3" class="row"></div> </div> The blu element is the HTML html{ background: steelblue; height: 100%; width: 100%; top:0; left:0; bottom: 0; right:0; } The lime one ist that div (#zwrapper) where I want to add the three red divs.

垂直水平居中方法小结

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前言：最近看到很多面试题目会问：请说出几种使用css完成垂直水平居中的方法？正好看css基础的时候看到一篇文章是讲完全居中的，这边对于文章中的内容做个小结。一、使用absolute(Absolute Centering) 1.1 具体代码如下： .container { position: relative; } .absolute_center { position: absolute; top: 0; right: 0; bottom: 0; left: 0; width: 50%; height: 50%; margin: auto; padding: 20px; overflow: auto; } <div class="container"> <div class="absolute_center"> <ul> <li> 该方法的核心思想是是使用绝对定位布局，使当前元素脱离正常的流体特性，而使用absolute的流体特性 </li> </ul> </div> </div> 1.2 该方法的核心思想是：使用absolute进行定位布局，脱离正常的块状元素流体特性，而通过absolute的流体特性完成垂直水平居中。这里有两个基本知识点需要知道： 1.流体特性：块状水平元素，如div元素，在默认情况下（非浮动、绝对定位等），水平方向会自动填满外部的容器

纯css实现手机通讯录

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我们经常在手机上看到通讯录列表，这类布局一般有两个显著的效果首字母吸顶快速定位下面我们来实现一下页面结构这里页面结构很简单，就是两个列表 <div class="con">  <div class="contacts" id="contacts"> <dl>A</dt> <dt>a1</dt> <dt>a2</dt> <dl>B</dt> <dt>b1</dt> <dt>b2</dt> ... </div>  <div class="index" id="index"> <a>A</a> <a>B</a> </div> </div> 然后加点样式 html,body{ margin: 0; height: 100%; padding: 0; } dl,dd{ margin: 0; } .con{ position: relative; height: 100%; overflow-x: hidden; } .index{ position: absolute; right: 0; top: 0; bottom: 0; display: flex; flex-direction: column; justify-content: center; } .index a{ display: block; width: 30px;