I'm trying to vertically center a div with Javascript. Because the text is going to be changing, I cannot use a fixed height.
I'd like to do this without Jquery.
#box2 {
width: 100%;
height: 100%;
position:relative;
background-color: orange;
}
#informationBox {
padding: 0.5em;
background-color: #fff;
border-radius: 12pt;
border: solid black 3pt;
max-width: 683px;
margin: 0 auto;
text-align: center;
}
Javascript:
var container = document.getElementById("#box2");
var inner = document.getElementById("#informationBox");
var inHeight = inner.offsetHeight;
container.style.height=(window.innerHeight);
container.style.width=window.innerWidth;
var conHeight=container.offsetHeight;
inner.style.marginTop=((conHeight-inHeight)/2);
Any help would be great :)
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I'm trying to vertically center a div with Javascript. Because the text is going to be changing, I cannot use a fixed height.
I'd like to do this without Jquery.
#box2 {
width: 100%;
height: 100%;
position:relative;
background-color: orange;
}
#informationBox {
padding: 0.5em;
background-color: #fff;
border-radius: 12pt;
border: solid black 3pt;
max-width: 683px;
margin: 0 auto;
text-align: center;
}
Javascript:
var container = document.getElementById("#box2");
var inner = document.getElementById("#informationBox");
var inHeight = inner.offsetHeight;
container.style.height=(window.innerHeight);
container.style.width=window.innerWidth;
var conHeight=container.offsetHeight;
inner.style.marginTop=((conHeight-inHeight)/2);
Any help would be great :)
http://jsfiddle/tmyie/EttZQ/
Share Improve this question asked Jun 18, 2013 at 21:15 user1469270user14692704 Answers
Reset to default 5You pretty much have it, you just need to change a couple things. First, getElementById takes just an id-string, not a selector. Secondly, you need to add 'px' to your style declration.
var container = document.getElementById("box2");
var inner = document.getElementById("informationBox");
var inHeight = inner.offsetHeight;
container.style.height = window.innerHeight;
container.style.width = window.innerWidth;
var conHeight = container.offsetHeight;
inner.style.marginTop = ((conHeight-inHeight)/2)+'px';
Here's an updated fiddle: http://jsfiddle/EttZQ/1/
Using js with line-height property.
less javascript, and precise centering.
box/info can have min/max-width/height & % or px ...
also resizes with the window.
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>center</title>
<style>
html,body{
width:100%;
height:100%;
margin:0;
padding:0;
}
#box{
width:100%;
height:100%;
text-align:center;
}
#info{
display:inline-block;
margin:0;padding:0 16px;
line-height:24px;
border-radius: 12pt;
border: solid black 3pt;
text-align: center;
vertical-align:middle;
box-sizing: border-box;
}
</style>
<script>
var center=function(){
var b=document.getElementById('box');
b.style['line-height']=b.offsetHeight+'px';
}
window.onload=center;
window.onresize=center;
</script>
</head>
<body>
<div id="box"><div id="info">center me pls<br>test</div></div>
</body>
</html>
One simple CSS solution.
http://jsfiddle/antouank/EttZQ/2/
body {
margin: 0;
}
#box2 {
width: 100%;
height: 100%;
position:absolute;
background-color: orange;
}
#informationBox {
padding: 0.5em;
background-color: #fff;
border-radius: 12pt;
border: solid black 3pt;
max-width: 100px;
margin: 0 auto;
text-align: center;
position: absolute;
top: 50%;
left: 50%;
}
You only need to calculate the width/height of your element, and change 50% to whatever you need to center it.
Make container pos anything other than static. Box : pos absolute. top:50% When box height changes, set margin top of box to -1 * height/2.