Usage no npm install needed!

<script type="module">
  import openstreetmapDateParser from 'https://cdn.skypack.dev/openstreetmap-date-parser';
</script>

README

openstreetmap-date-parser

A parser for date values as they are used for start_date and similar tags.

Installations

npm install --save openstreetmap-date-parser

Related modules

openstreetmap-date-format: format a date string into a human readable string (several languages available)
openstreetmap-date-query: builds a regexp from a date query, e.g. for usage with Overpass API.

API

It will return an array with the lower and upper boundaries for the year in which the event took place.

var osmDateParser = require('openstreetmap-date-parser')

console.log(osmDateParser('1984-10-20'))
// [ 1984, 1984 ]

console.log(osmDateParser('1914..1918'))
// [ 1914, 1918 ]

console.log(osmDateParser('early 1920s'))
// [ 1920, 1923 ]

console.log(osmDateParser('before 1855'))
// [ null, 1854 ]