https://github.com/shinnn/exif-date-regex

A regular expression to validate and parse Exif date format
https://github.com/shinnn/exif-date-regex

date ecmascript exif javascript lookbehind-assertion named-capture regular-expression validation

Last synced: 27 days ago
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A regular expression to validate and parse Exif date format

• Host: GitHub
• URL: https://github.com/shinnn/exif-date-regex
• Owner: shinnn
• License: mit-0
• Created: 2018-06-28T00:35:15.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2019-05-29T00:11:58.000Z (over 5 years ago)
• Last Synced: 2024-09-15T09:48:36.765Z (2 months ago)
• Topics: date, ecmascript, exif, javascript, lookbehind-assertion, named-capture, regular-expression, validation
• Language: JavaScript
• Size: 37.1 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# exif-date-regex

[![npm version](https://img.shields.io/npm/v/exif-date-regex.svg)](https://www.npmjs.com/package/exif-date-regex)

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A [regular expression](https://developer.mozilla.org/docs/Web/JavaScript/Guide/Regular_Expressions) to validate and parse Exif date format

```javascript

import exifDateRegex from 'exif-date-regex';

exifDateRegex.exec('2018:06:27 14:05:28').groups; /*=> {

  year: '2018',

  month: '06',

  date: '27',

  hours: '14',

  minutes: '05',

  seconds: '28'

} */

```

According to the [Exif specification (PDF)](http://www.cipa.jp/std/documents/e/DC-008-Translation-2016-E.pdf), the format of `DateTime`, `DateTimeOriginal` and `DateTimeDigitaized` is:

> "YYYY:MM:DD HH:MM:SS" with time shown in 24-hour

format, and the date and time separated by one blank character

## Installation

[Use](https://docs.npmjs.com/cli/install) [npm](https://docs.npmjs.com/about-npm/).

```

npm install exif-date-regex

```

## API

```javascript

import exifDateRegex from 'exif-date-regex';

```

### exifDateRegex

Type: [`RegExp`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/RegExp)

The regular expression has 6 capture groups `year`, `month`, `date`, `hours`, `minutes` and `seconds`.

```javascript

'2016:07:29 00:00:00'.replace(exifDateRegex, '$/$/$'); //=> '2016/07/29'

```

Leap years are taken into consideration.

```javascript

exifDateRegex.test('2016:02:29 12:30:00'); //=> true

exifDateRegex.test('2017:02:29 12:30:00'); //=> false

```

## License

[MIT No Attribution](./LICENSE) © 2019 Shinnosuke Watanabe