pretty-cache-header

Cache-control header utility that parses human readable time strings into seconds.

Time based values use Template Literal Types to help avoid passing invalid time string formats.

Installation

npm i pretty-cache-header

Usage

import { cacheHeader } from 'pretty-cache-header';

return new Response(..., {
  headers: {
    // sets cache control header to "public, max-age=604800, stale-while-revalidate=31536000"
    'Cache-Control': cacheHeader({
      public: true,
      maxAge: '1week',
      staleWhileRevalidate: '1year'
    })
  }
})

TimeString format

Any number followed by a timestring keyword:

1. ms, milli, millisecond, milliseconds - will parse to milliseconds
2. s, sec, secs, second, seconds - will parse to seconds
3. m, min, mins, minute, minutes - will parse to minutes
4. h, hr, hrs, hour, hours - will parse to hours
5. d, day, days - will parse to days
6. w, week, weeks - will parse to weeks
7. mon, mth, mths, month, months - will parse to months
8. y, yr, yrs, year, years - will parse to years