This method splits apart a query string and converts it into an regular object.

query_splitter.js

/*
  This method splits apart a
  query string and converts
  it into an regular object.
*/
const querySplitter = (url = '') => {
  // Split apart.
  const parts = url.split('?')
  const query = parts[1] || parts[0]
  const pairs = (query || '').split('&')

  // Set in conditional.
  const o = {}

  // Loop through.
  for (const pair of pairs) {
    // Split apart.
    const arr = pair.split('=')
    const key = arr[0]
    const val = arr[1]

    // Add to object?
    if (key && val) {
      o[key] = val
    }
  }

  // Expose object.
  return o
}

// Used like this.
console.log(
  querySplitter('https://example.com/index.html?query=1&foo=2&bar=3')
)

// Or, used like this.
console.log(
  querySplitter('query=1&foo=2&bar=3')
)

// Yields empty object.
console.log(
  querySplitter('')
)