overpass-frontend/src/fileFormatOSMXML.js

A JavaScript (NodeJS/Browser) library to easily access data from OpenStreetMap via Overpass API or from an OSM File. The objects can directly be used with LeafletJS or exported to GeoJSON. Data will be cached in the browser memory.

const DOMParser = require('@xmldom/xmldom').DOMParser
const convertFromXML = require('./convertFromXML')

module.exports = {
  id: 'OSMXML',

  willLoad (url, content, options) {
    return url.match(/\.osm$/)
  },

  load (content, options, callback) {
    let data
    const parser = new DOMParser({
      errorHandler: {
        error: (err) => { throw new Error('Error parsing XML file: ' + err) },
        fatalError: (err) => { throw new Error('Error parsing XML file: ' + err) }
      }
    })
    try {
      data = parser.parseFromString(content.toString(), 'text/xml')
    } catch (err) {
      return callback(err)
    }

    const result = convertFromXML(data.getElementsByTagName('osm')[0])

    callback(null, result)
  }
}