I've been working on a pure JavaScript based search engine for this static website and needed to access a get parameter within the URL.

I found a few solutions online but they usually made use of jQuery or weren't in CoffeeScript. A few others would only extract an individual named parameter at a time. The following will return all of them in JavaScript's equivalent of a hash (or dictionary if you prefer) in the form of an object.

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getParams = ->
  query = window.location.search.substring(1)
  raw_vars = query.split("&")

  params = {}

  for v in raw_vars
    [key, val] = v.split("=")
    params[key] = decodeURIComponent(val)

  params

console.log(getParams())

If compiled and included in a page the above will print out the parameters as a hash object to the console.