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How to tell if browser/tab is active [duplicate]
...n) {
// do what you need
}
This specification defines a means for site developers to
programmatically determine the current visibility state of the page in
order to develop power and CPU efficient web applications.
Learn more (2019 update)
All modern browsers are supporting document...
How can HTML5 “replace” Flash? [closed]
..., in a full-fledged implementation of HTML5, you can implement dynamic web sites without using Flash. An example is the HTML5 version of Youtube, recently introduced as beta for Safari/Chrome users, see here. Another is an NES emulator in javascript + HTML. (Well the latter does not really concern H...
How to check what version of jQuery is loaded?
...:
jQuery.fn.jquery
Recently I have had issues using $.fn.jquery on a few sites so I wanted to note a third simple command to pull the jQuery version. $_ should return a string containing the version number.
If you get back a version number -- usually as a string -- then jQuery is loaded and t...
When is JavaScript's eval() not evil?
...er's data. Injected code will run (in the browser) as if it came from your site, letting it do any sort of shenanigan that the user could do manually. If you allow (third-party) code to enter you page, it can order things on behalf of your customer, or change their gravatar, or whatever they could d...
Uncaught Error: SECURITY_ERR: DOM Exception 18 when I try to set a cookie
...lled, simply type python -m SimpleHTTPServer in the root directory of your site, and find it hosted at localhost:8000.
– Thomas
Sep 4 '11 at 17:00
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Upgrade Node.js to the latest version on Mac OS
...t "n" is a Node.js version manager, as somewhat explained on the npm js website - npmjs.com/get-npm
– Mark
Oct 29 '18 at 18:32
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How do I make the first letter of a string uppercase in JavaScript?
...code for an unknown consumer (like an analytics script that goes on random sites), but other than that it's fine.
– csuwldcat
May 19 '12 at 20:47
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What does “javascript:void(0)” mean?
...it behaves like a button, that's how really you should mark it up.
(*: in site authoring, anyway. Obviously they are useful for bookmarklets. javascript: pseudo-URLs are a conceptual bizarreness: a locator that doesn't point to a location, but instead calls active code inside the current location. ...
When should I use GET or POST method? What's the difference between them?
...ly a security aspect to the difference between GET and POSTs. A malicious site can stick an arbitrary GET request in an image tag for instance, causing users to do a GET against another server. If this GET is like otherserver/deletemyaccount then bad things happen.
– Frank Sc...
JOIN queries vs multiple queries
...specific case. It depends on a lot of things. Jeff Atwood (founder of this site) actually wrote about this. For the most part, though, if you have the right indexes and you properly do your JOINs it is usually going to be faster to do 1 trip than several.
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