The attached ImageLoader helper will start fetching an image and return an image that is resolved once the image is...

jQuery's find looks in the element's descendants. It will never return the current element itself, even if the...

Sometimes you want to preload images that you will be using later. E.g. if hovering over a an area changes...

To delay your entire Jasmine test suite until the DOM is ready, add the following: beforeAll(function(done) { $(done); });

Since jQuery 3 saw it's first release candidate today, the links has a list of (breaking) changes.

When you have a localized website, you may want to redirect users to their preferred language when they visit the...

fake_stripe spins up a local server that acts like Stripe’s and also serves a fake version of Stripe.js...

When building a form with a file select field, you may want to offer your users a live preview before...

You can use JavaScript to get or set cookie values on the client. Using the vanilla JavaScript API

jQuery's deferred objects behave somewhat like standard promises, but not really. One of many subtle differences is that there...

Current webkit browsers like Chrome and Safari have a special variable in their consoles that refers to the selected DOM...

The NestedHash class allows you to read and write hashes of any depth. Examples: hash = {} NestedHash.write hash, 'a', 'b', 'c...

Some modern Javascript APIs return iterators instead of arrays. In plain Javascript you can loop through an iterator using

To upload a file via AJAX (e.g. from an ) you need to wrap your params in a FormData object.

Angular's location provider stalls links to the current URL, i.e. window.location. As soon as the $location service is activated...

Let's say you want to find the element with the text hello in the following DOM tree: hello

A HTTP 302 Found redirect to PATCH and DELETE requests will be followed with PATCH or DELETE. Redirect responses to...

In JavaScript we often use Immediately Invoked Function Expessions (or IIFEs) to prevent local variables from bleeding into an outside...

During debugging you might pepper your code with lines like these: console.log('foo = ' + foo + ', bar = ' + bar) I recommend to use...

From Rails 3.0.9, there is a method Hash#to_query that will turn a Hash into a query string:

There are cases when you need to select DOM elements without jQuery, such as: when jQuery is not available

Until recently, you could open a new tab via window.open when using execute_script in Selenium tests. It no longer...