Description: Get the current computed height for the first element in the set of matched elements.
The difference between
.css('height') and .height() is that the latter returns a unit-less pixel value (for example, 400) while the former returns a value with units intact (for example, 400px). The .height() method is recommended when an element's height needs to be used in a mathematical calculation.
This method is also able to find the height of the window and document.
$(window).height(); // returns height of browser viewport $(document).height(); // returns height of HTML document
Examples
Example 1
Show various heights. Note the values are from the iframe so might be smaller than you expected. The yellow highlight shows the iframe body.
function showHeight(ele, h) {
$("div").text("The height for the " + ele +
" is " + h + "px.");
}
$("#getp").click(function () {
showHeight("paragraph", $("p").height());
});
$("#getd").click(function () {
showHeight("document", $(document).height());
});
$("#getw").click(function () {
showHeight("window", $(window).height());
});
Full code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<style>
body { background:yellow; }
button { font-size:12px; margin:2px; }
p { width:150px; border:1px red solid; }
div { color:red; font-weight:bold; }
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>
$(document).ready(function(){
function showHeight(ele, h) {
$("div").text("The height for the " + ele +
" is " + h + "px.");
}
$("#getp").click(function () {
showHeight("paragraph", $("p").height());
});
$("#getd").click(function () {
showHeight("document", $(document).height());
});
$("#getw").click(function () {
showHeight("window", $(window).height());
});
});
</script>
</head>
<body>
<button id="getp">Get Paragraph Height</button>
<button id="getd">Get Document Height</button>
<button id="getw">Get Window Height</button>
<div> </div>
<p>
Sample paragraph to test height
</p>
</body>
</html>
Description: Set the CSS height of every matched element.
When calling .height(value), the value can be either a string (number and unit) or a number. If only a number is provided for the value, jQuery assumes a pixel unit. If a string is provided, however, any valid CSS measurement may be used for the height (such as 100px, 50%, or auto). Note that in modern browsers, the CSS height property does not include padding, border, or margin.
If no explicit unit was specified (like 'em' or '%') then "px" is concatenated to the value.
Arguments
An integer representing the number of pixels, or an integer with an optional unit of measure appended (as a string).
Example
To set the height of each div on click to 30px plus a color change.Full source:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<style>div { width:50px; height:70px; float:left; margin:5px;
background:rgb(255,140,0); cursor:pointer; } </style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>
$(document).ready(function(){
$("div").one('click', function () {
$(this).height(30)
.css({cursor:"auto", backgroundColor:"green"});
});
});
</script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</body>
</html>
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