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
<!DOCTYPE html>
<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="https://code.jquery.com/jquery-latest.js"></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>
<script>
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", $(window).height());
});
</script>
</body>
</html>
Description: Set the CSS height of every matched element.
valueAn integer representing the number of pixels, or an integer with an optional unit of measure appended (as a string).
function(index, height)A function returning the height to set. Receives the index position of the element in the set and the old height as arguments.
When calling .height(value)
, the value can be either a string (number and unit) or a number. If only a number is provided for the value, jQuery assumes a pixel unit. If a string is provided, however, any valid CSS measurement may be used for the height (such as 100px
, 50%
, or auto
). Note that in modern browsers, the CSS height property does not include padding, border, or margin.
If no explicit unit was specified (like 'em' or '%') then "px" is concatenated to the value.
<!DOCTYPE html>
<html>
<head>
<style>div { width:50px; height:70px; float:left; margin:5px;
background:rgb(255,140,0); cursor:pointer; } </style>
<script src="https://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<script>$("div").one('click', function () {
$(this).height(30)
.css({cursor:"auto", backgroundColor:"green"});
});</script>
</body>
</html>