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How to detect online/offline event cross-browser?
...o an example of the "listening for AppCache error events" approach:
http://www.html5rocks.com/en/mobile/workingoffthegrid/#toc-appcache
...and an example of the "listening for XMLHttpRequest failures" approach:
http://www.html5rocks.com/en/mobile/workingoffthegrid/#toc-xml-http-request
HTH,
-- Chad
...
How can I check if a URL exists via PHP?
...
Here:
$file = 'http://www.example.com/somefile.jpg';
$file_headers = @get_headers($file);
if(!$file_headers || $file_headers[0] == 'HTTP/1.1 404 Not Found') {
$exists = false;
}
else {
$exists = true;
}
From here and right below the above...
Center image in div horizontally [duplicate]
...lass="outer">
<div class="inner">
<img src="http://www.5150studios.com.au/wp-content/uploads/2012/04/wide.jpg" alt="wide image" />
</div>
</div>
CSS
img
{
max-width: 100%;
max-height: 100%;
display: block;
margin: auto auto;
}
.outer
{
...
Does “display:none” prevent an image from loading?
...isplay is set to none.
Here is a testing page that will prove it:
http://www.quirksmode.org/css/displayimg.html
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Rails - controller action name to string
...
found out it's possible with self.current_method
easily found at http://www.ruby-forum.com/topic/75258
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How to store decimal values in SQL Server?
... is the max number of digits you can have after the decimal point.
http://www.tsqltutorials.com/datatypes.php has descriptions for all the datatypes.
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Sort Go map values by keys
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
What is the difference between HTTP_HOST and SERVER_NAME in PHP?
... no problem to send a request to your site asking for a HTTP_HOST value of www.stackoverflow.com.
SERVER_NAME comes from the server's VirtualHost definition and is therefore considered more reliable. It can, however, also be manipulated from outside under certain conditions related to how your web ...
JavaScript global event mechanism
...d Error Tracking and Real User Monitoring for modern web apps.
https://www.atatus.com/
Let me explain how to get stacktraces that are reasonably complete in all browsers.
Error handling in JavaScript
Modern Chrome and Opera fully support the HTML 5 draft spec for ErrorEvent and window.onerr...
How to use QueryPerformanceCounter?
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...