Struggling to figure out a basic Javascript function for calculating height

Does anyone have any ideas as to why this code isn't working properly? I am trying to set a dynamic height for a fixed width div that might extend below the viewport.

<script type="text/javascript">
function adjustHeight() {  
  var div = document.getElementById('bg');
  var height = document.scrollHeight;
  div.style.height = height + 'px';
}
</script>     
</head>

<body onload="adjustHeight()">
    <div id="bg">

If there is no solution, does anyone know of an alternative approach? Any assistance would be greatly appreciated. Thank you

javascriptfindheight

Answer №1

To accomplish this task, utilize JavaScript and make use of the 'offsetHeight' method. 

function findElementHeight() {
    var elementHeight = document.getElementById('example').offsetHeight;
    alert(elementHeight);
}

Check out this example on JSFiddle
For more information, refer to this resource

Answer №2

Here is my proposed solution to tackle this issue. I believe it may prove helpful in resolving the problem at hand.

Preventing div collapse when minimizing browser window

Utilize the $(window).height() method in jQuery to retrieve the height of the window.

Answer №3

The reason why the functionality is not working is due to the fact that the div.style.height is empty, resulting in parseFloat returning NaN.

document.getElementById('bg').offsetHeight
will resolve this issue.

Alternatively, give this a try:

function bodyHeight() {
var scnHei;

if (self.innerHeight) // all except Explorer
{
    scnHei = self.innerHeight;
}
else if (document.documentElement && document.documentElement.clientHeight)
    // Explorer 6 Strict Mode
{
    scnHei = document.documentElement.clientHeight;
}
else if (document.body) // other Explorers
{
    scnHei = document.body.clientHeight;
}

document.getElementById("bgr_right").style.height=scnHei + "px";
document.getElementById("bgr_left").style.height=scnHei + "px";
}

Add onload=bodyHeight(); to your body tag.

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