simple-url-deparm.js

"use strict";

const assert = require('assert') // for tests

const deparam = url => {
  const decodeUri = global.decodeURIComponent
  const reduce = Array.prototype.reduce
  const query = url.substr(url.indexOf('?') + 1).split('&')
  return reduce.call(query, (memo, keyValue) => {
    let key = keyValue.substr(0, keyValue.indexOf('='))
    let val = keyValue.substr(keyValue.indexOf('=') + 1)
    memo[decodeUri(key)] = val
    return memo
  }, {})
}

try {
  assert.deepEqual(
    deparam('a=1&b=2&c=3&d=4&e=5'),
    { e: '5', d: '4', c: '3', b: '2', a: '1' },
    'can deparam'
  )
  assert.deepEqual(
    deparam('http://google.com/?a=1&b=2&c=3&d=4&e=5'),
    { e: '5', d: '4', c: '3', b: '2', a: '1' },
    'can deparam'
  )
  assert.deepEqual(
    deparam('§=1&£=2&ß=3'),
    { '§': '1', '£': '2', 'ß': '3' },
    'can deparam'
  )
  console.info('≥ tests passed :)')
} catch (err) {
  console.error(err)
}