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87 lines
2.7 KiB
Markdown
87 lines
2.7 KiB
Markdown
# datetime
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Simple helper to help parse date strings into `Date`, with additional functions.
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## Usage
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The following symbols from
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[unicode LDML](http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table)
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are supported:
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- `yyyy` - numeric year
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- `yy` - 2-digit year
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- `M` - numeric month
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- `MM` - 2-digit month
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- `d` - numeric day
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- `dd` - 2-digit day
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- `H` - numeric hour (0-23 hours)
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- `HH` - 2-digit hour (00-23 hours)
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- `h` - numeric hour (1-12 hours)
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- `hh` - 2-digit hour (01-12 hours)
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- `m` - numeric minute
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- `mm` - 2-digit minute
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- `s` - numeric second
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- `ss` - 2-digit second
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- `S` - 1-digit fractionalSecond
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- `SS` - 2-digit fractionalSecond
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- `SSS` - 3-digit fractionalSecond
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- `a` - dayPeriod, either `AM` or `PM`
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- `'foo'` - quoted literal
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- `./-` - unquoted literal
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### parse
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Takes an input `string` and a `formatString` to parse to a `date`.
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```ts
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import { parse } from 'https://deno.land/std/datetime/mod.ts'
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parse("20-01-2019", "dd-MM-yyyy") // output : new Date(2019, 0, 20)
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parse("2019-01-20", "yyyy-MM-dd") // output : new Date(2019, 0, 20)
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parse("2019-01-20", "dd.MM.yyyy") // output : new Date(2019, 0, 20)
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parse("01-20-2019 16:34", "MM-dd-yyyy HH:mm") // output : new Date(2019, 0, 20, 16, 34)
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parse("01-20-2019 04:34 PM", "MM-dd-yyyy hh:mm a") // output : new Date(2019, 0, 20, 16, 34)
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parse("16:34 01-20-2019", "HH:mm MM-dd-yyyy") // output : new Date(2019, 0, 20, 16, 34)
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parse("01-20-2019 16:34:23.123", "MM-dd-yyyy HH:mm:ss.SSS") // output : new Date(2019, 0, 20, 16, 34, 23, 123)
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...
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```
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### format
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Takes an input `date` and a `formatString` to format to a `string`.
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```ts
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import { format } from "https://deno.land/std/datetime/mod.ts";
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format(new Date(2019, 0, 20), "dd-MM-yyyy"); // output : "20-01-2019"
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format(new Date(2019, 0, 20), "yyyy-MM-dd"); // output : "2019-01-20"
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format(new Date(2019, 0, 20), "dd.MM.yyyy"); // output : "2019-01-20"
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format(new Date(2019, 0, 20, 16, 34), "MM-dd-yyyy HH:mm"); // output : "01-20-2019 16:34"
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format(new Date(2019, 0, 20, 16, 34), "MM-dd-yyyy hh:mm a"); // output : "01-20-2019 04:34 PM"
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format(new Date(2019, 0, 20, 16, 34), "HH:mm MM-dd-yyyy"); // output : "16:34 01-20-2019"
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format(new Date(2019, 0, 20, 16, 34, 23, 123), "MM-dd-yyyy HH:mm:ss.SSS"); // output : "01-20-2019 16:34:23.123"
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format(new Date(2019, 0, 20), "'today:' yyyy-MM-dd"); // output : "today: 2019-01-20"
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```
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### dayOfYear
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Returns the number of the day in the year.
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```ts
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import { dayOfYear } from "https://deno.land/std/datetime/mod.ts";
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dayOfYear(new Date("2019-03-11T03:24:00")); // output: 70
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```
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### weekOfYear
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Returns the ISO week number of the provided date (1-53)
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```ts
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import { weekOfYear } from "https://deno.land/std/datetime/mod.ts";
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weekOfYear(new Date("2020-12-28T03:24:00")); // Returns 53
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```
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