What I learned building an alarm clock that lives in a browser tab

<p>I built a <a href="https://instantfreetools.com/alarm-clock/" rel="noopener noreferrer">browser alarm clock</a> for people who want a quick alarm on a laptop, like a reminder to leave for a meeting or to take something out of the oven. The first thing I had to write on the page was what it can't do: it is not a replacement for your phone's built-in alarm. Here is why, and what I did about each

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