Center div horizontally

问题

On this page, I would like to horizontally center the main #container div relative to the page. Normally I would achieve this by adding a CSS rule,

#container { margin: 0 auto }

However, the layout of this page (which I did not write), uses absolute positioning for #container and most of its child elements, so this property has no effect.

Is there any way I can achieve this horizontal centering without rewriting the layout to use static positioning? I've no problem with using JavaScript/JQuery if that's the only way to achieving my objective.

回答1:

Same as @rquinn answer but this will adjust to any width. Check this demo

http://jsfiddle.net/Starx/V7xrF/1/

HTML:

<div id="container"></div>

CSS:

* { margin:0;padding:0; }
#container {
    width:50px;
    position:absolute;
    height:400px;
    display:block;
    background: #ccc;
}

Javascript

function setMargins() {
    width = $(window).width();
    containerWidth = $("#container").width();  
    leftMargin = (width-containerWidth)/2;    
    $("#container").css("marginLeft", leftMargin);    
}

$(document).ready(function() {
    setMargins();
    $(window).resize(function() {
        setMargins();    
    });
});

回答2:

You can use also use jQuery:

  function setMargins() {
    var width = $(window).width();
    if(width > 1024){
        var leftMargin = (width - 1024)/2;
        $("#container").css("marginLeft", leftMargin);    
    }
 }

Then I put this code after the $(document).ready event:

$(document).ready(function() {

    setMargins();

    $(window).resize(function() {
        setMargins();    
    });
});

回答3:

the container width is 1024px, so you can try to give a left value 50% and margin-left: -512px.

回答4:

Using Javascript, this will put #container at the center of your browser's window.

document.getElementById("container").style.top= (window.innerHeight - document.getElementById("container").offsetHeight)/2 + 'px';
document.getElementById("container").style.left= (window.innerWidth - document.getElementById("container").offsetWidth)/2 + 'px';

回答5:

If your main container is using absolute position, you can use this CSS to center it horizontally;

#container {
   position:absolute;
   width:1000px;  /* adjust accordingly */
   left:50%;
   margin-left:-500px; /* this should be half of the width */
}

回答6:

It's simple. Try this

body {
    margin:50px 0px; padding:0px; /* Need to set body margin and padding to get consistency between browsers. */
    text-align:center; /* Hack for Internet Explorer 5/Windows hack. */
}

#Content {
    width:500px;
    margin:0px auto; /* Right and left margin widths set to "auto". */
    text-align:left; /* Counteract to Internet Explorer 5/Windows hack. */
    padding:15px;
    border:1px dashed #333;
    background-color:#eee;
}

回答7:

This way worked best for me. Without changing margins, but the position. Required: object -> margin-left: 0; and position: relative;

check example here: jsfiddle Code:

function setObjPosition(container, object) {
    var containerWidth = $(container).width();
    var objectWidth = $(object).width();

    var position = (containerWidth / 2) - (objectWidth / 2);

    $(object).css('left', position);
}

function setPositionOnResize(container, object) {
    setObjPosition(container, object);
    $(container).resize(function () {
        setObjPosition(container, object);
    });
}

Use:

<script type="text/javascript">
    $(document).ready(function () {
        setPositionOnResize(window, "#PanelTeste");
    });
</script>

It can be centered within any container.

来源：https://stackoverflow.com/questions/4666330/center-div-horizontally

标签

jquery

css

positioning

css-position