Simple center a object with css and no hacks

问题

I want to center an object using CSS and no hacks, is this possible and how?

I have tried this, but than my p tag is gone.

.centered {
  position: fixed;
  top: 50%;
  left: 50%;
}

回答1:

There's several ways to center an element. But it depends on what your element is and how we choose to display it:

• If you have {display:inline; }

  This is simple. You can just use "text-align: center;" to center text, images and divs.

• If you have {display:block;}

  This is a bit more difficult. It depends on how your object is positioned. Your object could be relative, absolute, or fixed.

  • If it is relative; then you can use "margin:0 auto;", however you will require a width value.

  • If it is absolutely positioned, then you need to specify your "top:" and "left:" values. You'll also need a width. If you know the width of the element, the best way is to use {left:50%; margin-left:-X}, where X = 1/2 the width of the element.

回答2:

HTML:

<div>Centered</div>

CSS:

div {
    margin: 0 auto;
    width: 200px;
}

Live example: http://jsfiddle.net/v3WL5/

Note that margin: 0 auto; will only have an effect if the div has a width.

回答3:

Use margin: auto like this:

margin: 0px auto

回答4:

Use this for general purposes. Even span or div which is inside whatever :

width:inherit; display:block;margin:0 auto;

回答5:

Usage :

1. In-Line usage : Content goes here....

2. CSS Code :

   #text-align { text-align:center }

HTML Code :

<div id="text-align">Content goes here....</div>

http://www.techulator.com/resources/4299-center-Deprecated-tags-HTML.aspx

回答6:

late into the game, but have you tried with display:flex on the parent ?

I have a useful class that is simple and works with all type of elements:

/* apply this on the parent */
.center {
    display:flex;
    align-items: center; /*vertical alignement*/
    justify-content: center; /* horizontal alignement*/
}

This is relatively new but supported at ~98% of major browsers.

However I suggest that you learn a bit about flexBox, it may seem complicated at first but it is very powerful for all type layouts !

回答7:

if you don't need to be position:fixed; you can just use

<center>
Hello
</center>

This is deprecated in HTML5

来源：https://stackoverflow.com/questions/14883805/simple-center-a-object-with-css-and-no-hacks