Node isConnected

By  on  

Every so often I discover a property in JavaScript objects that I didn't know existed, oftentimes using another trick to accomplish the same functionality. One such property I just learned about was isConnected, a node property that attached to a context (i.e. document).

Here's how to use Node.prototype.isConnected:

const el = document.createElement('div');
el.isConnected; // false

document.body.appendChild(el);
el.isConnected; // true

I used to run parentNode checks on the element to see if it had been injected but that's not always accurate, so I'm glad isConnected exists!

Recent Features

  • By
    fetch API

    One of the worst kept secrets about AJAX on the web is that the underlying API for it, XMLHttpRequest, wasn't really made for what we've been using it for.  We've done well to create elegant APIs around XHR but we know we can do better.  Our effort to...

  • By
    Serving Fonts from CDN

    For maximum performance, we all know we must put our assets on CDN (another domain).  Along with those assets are custom web fonts.  Unfortunately custom web fonts via CDN (or any cross-domain font request) don't work in Firefox or Internet Explorer (correctly so, by spec) though...

Incredible Demos

  • By
    Animated AJAX Record Deletion Using MooTools

    I'm a huge fan of WordPress' method of individual article deletion. You click the delete link, the menu item animates red, and the item disappears. Here's how to achieve that functionality with MooTools JavaScript. The PHP - Content & Header The following snippet goes at the...

  • By
    Disable Autocomplete, Autocapitalize, and Autocorrect

    Mobile and desktop browser vendors do their best to help us not look like idiots by providing us autocomplete, autocorrect, and autocapitalize features.  Unfortunately these features can sometimes get in the way;  we don't always want or need the help they provide.  Luckily most browsers allow...

Discussion

    Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!