Add a subtle “barbershop pole” stripe animation to progress bars. Gracefully degrades in older browsers that don't support CSS3 animation and/or linear gradients (the stripes will appear without movement, or not appear at all).
Prevent users from entering an expired credit card month/year combination, by using the current date to disable options that occur in the past.
Change the display order of content on an HTML page just by adding querystring parameters to its URL. Content is rearranged entirely on the front-end with CSS flexbox, letting you create variations on-the-fly without any server-side component or deployment process.
Applies a basic parallax effect to an element's background image, creating the impression that it moves at a different speed from the rest of the page while scrolling.
Request the user's location and then prepopulate their address in a form.
Dynamically prevent text orphans by enforcing a minimum number of words in the last line of any text block.
Prevent page body scrolling on iOS while a Bootstrap modal is open.