Browser and Node.js utilities, async patterns and DOM helpers.
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Build an object of arrays keyed by a property or computed value, using Object.groupBy or a reduce fallback.
Turn a date into a localized relative string using Intl.RelativeTimeFormat, with no library.
Delay a function call until the caller has stopped invoking it for a given time, with cancel support.
Use the async Clipboard API with a legacy fallback and report success or failure to the user.
Break an array into fixed-size pieces, useful for batching API calls or database inserts.