After inspecting the window
object using Firebug, I discovered that both window.innerWidth
and window.outerWidth
were set to 1230
.
Can you explain the distinction between these two values?
After inspecting the window
object using Firebug, I discovered that both window.innerWidth
and window.outerWidth
were set to 1230
.
Can you explain the distinction between these two values?
According to information from Mozilla Developer Network:
window.outerWidth
The window.outerWidth property retrieves the width of the outer browser window, encompassing the sidebar (if expanded), window chrome, and resizing borders/handles.
and
window.innerWidth
This property returns the width (in pixels) of the browser window viewport including the vertical scrollbar if it's rendered.
Under normal circumstances, these properties should function as described. However, when tested on Firefox 14.0.1 on Ubuntu 12.04, they both return the same value regardless of window resizing. On the other hand, in Chromium, there is an observable difference of 8 pixels between them. This variance appears to be due to the specific window chrome dimensions in that web browser.
Here is the code snippet used for the test page:
<!DOCTYPE html>
<html lang="en">
<head>
<title>12066093</title>
<meta charset="utf-8">
</head>
<body>
<div style="width:2000px; height: 2000px;">hi</div>
<script type="text/javascript">
alert("window.innerWidth: " + window.innerWidth + "\nwindow.outerWidth: " + window.outerWidth);
</script>
</body>
</html>
For more in-depth information on window.innerWidth and window.outerWidth, make sure to refer to the Mozilla documentation. It's worth noting that window.outerWidth takes into account window borders, resizing handles, and sidebars if available on your operating system or window manager.
Experiment by opening the bookmarks or history sidebar and then examining these properties in Firebug for a hands-on understanding.
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