centering ruler

Pure CSS implementation: The Elements in the box are vertically centered, the width and height are fixed or not, except IE5 all browsers are compatible:1 DOCTYPE HTML>2 HTML>3 Head>4 MetaCharSet= "Utf-8" />5 title>Pure CSS implementation: The Elements in the box are vertically centered, the width and height are fixed or not, except IE5 all browsers are compatibletitle>6 style>7 *{margin:0;padding:0; }8 Div{ text-align:Center; background:#f00;width:800px;Height:300px; }9 Div *{ height:100%; Dis

1. If you do not know your height and the height of the parent container, you only need the following three lines to use absolute positioning:parentElement{ position:relative; } childElement{ position: absolute; top: 50%; transform: translateY(-50%); }2. If there is only one element under the parent container and the parent element is set to a height, only relative positioning is required parentElement{ height:xxx; } .childElement { position: relative; top: 50%; transform: trans

-space:nowrap;} 2. Multiple lines of restrained elements added {vertical-align:middle;} 3.table-like cannot be used with flexbox.flex-center-vertically {display:flex;justify-content:center;flex-direction:column; height:400px;} 4. Know the height of the block-level element. Parent {position:relative;}. Child {position:absolute;top:50%;height:100px;margin-top: -50px;} 5. Block-level element of unknown height. parent {position:relative;}. Child {Position:absolute;top:50%;transform:translatey (-50%)

xCatalog [1]text-align [2]margin [3]absolute] [4]flex front wordsHorizontal centering is a frequently encountered problem. It seems that there are many ways, all roads lead to Rome . but the system combing, in fact, all around a few ideas unfold. This article will introduce 4 ways of thinking about horizontal centeringidea One: Set text-align:center in the parent elementRealizeInline elements are centered horizontallySet the display of the child eleme

The first centering method:Use Margin:auto;This should be the most use of the center, but also has limitations, the center of the element needs to set the width, and is a block element only line, and can only achieve horizontal center, the principle of this method is to allow the browser to automatically calculate the left and right margin to achieve the center;class= "Big"> class= " Small ">div>div> . big{ width:200px; height:100px;

Horizontal centering is a frequently encountered problem. It seems that there are many ways, all roads lead to Rome. But the system combing, in fact, all around a few ideas unfold. This article will introduce about the horizontal center of the 4 kinds of ideas, interested friends refer to it Previous wordsHorizontal centering is a frequently encountered problem. It seems that there are many ways, all roads

First, the vertical horizontal center of img Important style attributes to use Display,vertical-alignVertical-align:middle This property is a function of centering the table element vertically, and if you want to use the IMG element, note the following display settings html lang="en">head> meta charset="UTF-8"> title>Documenttitle> style type="Text/css"> . Main{ width: px; height: px; background-color: #aaa; displ

Centering HTML elements larger than their parentsIt's not a common problem, but I ' ve run into it a few times. How does you center a element when it is larger than it's parent? I mean really center it, where content overflows both the left and right borders of the parent element equally.The default behaviour in HTML and CSS (using) are to line up the left edges of the child and the margin:0px auto; parent elements while Al L The overflowing happens o

In the process of layout, we have to center on some elements, I believe, we have no problem in the horizontal center, is to usemargin:0 auto; and text centered text-align:center.Here's what I want to tell you about overall centering (horizontal and vertical centering),Here, I first told you that I used the absolute positioning method,I'm going to make a box for you to observe directly, as followsThe outer a

CSS element centered1. Center Horizontally1) Horizontal centering of elements in text, picture and other linesAdds a Text-align:center property to the parent block element.2) determines the horizontal center of the block-level element of the width (note must be inside the block element)By setting Margin-left:auto and Margin-right:auto to achieve3) Horizontal center of the block element with indeterminate width(1) Change the block element of the indete

centered 　　 1. How do I make a picture center vertically in a div 　　 For this CSS centering problem, we can use the method of setting the background image. Example: 　　 Body {background:url ("sample.gif") #FFF No-repeat Center;} 　　 The key is the center property, which indicates that the background picture is centered in the container. You can also change the Cener to top left or write the numbers directly to adjust its position. 　　 2. How do I make t

It's not easy to use CSS to center an element in a display. The same CSS centering settings in different browsers also have their own performance. This article introduces several common methods for displaying elements horizontally in CSS.　　1. Centering with automatic marginThe preferred way to center elements horizontally in CSS is to use the margin property-set the Margin-left and Margin-right properties o

height of its parent element. If the above methods of vertical centering fail, it is only ' ghost element ' technology, with pseudo-elements (pseudo element). A full-height pseudo-element is placed in the parent container, and the element to be centered vertically is centered with it: ghost-center{position:relative;}.ghost-center:: before{content: "";Display:inline-block;height:100%;width:1%;Vertical-align:middle;}.ghost-center p{Display:inline-block

Vertical centering is one of the most common effects in layout, in order to achieve good compatibility, the method of vertical centering of PC side is generally through absolute positioning, Table-cell, negative margin and so on. With the CSS3, the vertical centering on the mobile side is more diversified. Method 1:table-cellHTML structure:class= "box box1"> s

Center vertically: Method OneUse: Display:table;vertical-align:middle;-Vertical centering: Method TwoUse: Position:absolute;-Vertical centering: Method TwoUse: Position:absolute; two-Vertical centering: Method ThreeUse: Display:flex;Justify-content:center; Center horizontallyAlign-items:center; Center vertically not supported under IE9,IE8;-Center vertically: Met

Vertical centering is one of the most common effects in layout, in order to achieve good compatibility, the method of vertical centering of PC side is generally through absolute positioning, Table-cell, negative margin and so on. With the CSS3, the vertical centering on the mobile side is more diversified.Method 1:table-cellHTML structure: 123

element is set as block-level element, this method is not applicable, the case of block-level elements are divided into fixed-width block-level elements and variable-width block-level elements of two. Fixed-width block-level elements Satisfies the fixed width block level element "The fixed width" and "The Block level element" two condition to be possible to achieve the center by setting the left and right margin value to auto. Variable width block level element There are three ways to center a

Absolute Positioning centering (Absolute centering) technology We often use margin:0 auto to achieve horizontal centering, and always think that margin:auto can not be vertically centered ... In fact, implementing vertical centering requires only declaring the element height and the following CSS: . absolute-center {

Introduction: Web page production WEBJX article: The center has always been the designers prefer to use a form of placement, whether it is a picture or text will be asked to put in the middle, horizontal or vertical. CSS provides a lot of handy ways to get content centered, and here's a list of the longest-used centering techniques.Centering has always been a form of placement that designers prefer to use, whether it is a picture or text that is requi

What do you think about centering?Div {margin: auto;}A common centering methodCenter horizontally. Demo { text-align: Center; margin: auto; position: absolute; Left: 50%; margin-left: -?px;}Center vertically. Demo { height: 30px; line-height: 30px; display: Table-cell; vertical-align: Middle; position: absolute; top: 50%; margin-top: -?px;}Is there any ot