Release Countdown Changelog Block for React

The countdown runs to target, which the block sets after the page opens as the moment it opened plus LEFT_MS (11 days and 6 hours), so the example never goes stale. For a real release, replace that line with your release's timestamp, an ISO string or a Date: the countdown then counts to that moment for everyone, and onComplete fires once when it reaches zero. Until the browser knows the time, an unseen placeholder holds the readout's width so nothing shifts.

It changes the block's own state and nothing else. The button is a toggle: pressed, it reads Reminder set with a check, and a status line (a live region present from load) says that nothing is sent and the choice stays on this page; pressed again, it goes back. Both labels share one cell, so the button never changes width, and the line keeps its height. To make it real, send the choice to your backend from the handler.

Edit SCHEDULED at the top of the file: each change has a kind (NEW, IMPROVED or FIXED, each an icon and a word), a title and a line. The list is numbered in the order they appear. Keep it to a few: this block is about the countdown, and the full list belongs in the release's own page.

The countdown is a time element that hands a screen reader the time remaining written out ("11 days, 6 hours, 4 minutes, 9 seconds") rather than the dropping digits, and the framed readout carries a caption. The changes are a real ordered list, each with an h3. Remind me is a button that says whether it is pressed; Tab reaches it and Space or Enter presses it.

Below lg the split becomes one column in this order: the heading, the countdown frame with its button, then the list, with a rule between the parts. The readout shrinks to fit at 320 pixels and nothing scrolls sideways. In a right-to-left layout the split mirrors while the countdown keeps its left-to-right digits and the version stays left to right.

The countdown ticks once a second, and each digit that changes drops into its window. With reduced motion the digits change in place; the entrance fade is off too. Nothing else loops, and the countdown stops at zero.