@kaliber/use-query-string

Update the query string, just like you would update your state.

Installation

yarn add query-string
yarn add @kaliber/use-query-string

If you're using @kaliber/build, make sure query-string and it's non es5-compatible dependencies are transpiled:

config/default.js

module.exports = {
  kaliber: {
    compileWithBabel: [
      /@kaliber\//,
      /query-string/,
      /split-on-first/,
      /strict-uri-encode/,
    ]
  }
}

Usage

useQueryString returns an array with two items: the parsed query string and a setter function. If there is no query to parse the parsed query will be an empty object. This makes it realiable to destructure values from the parsed query. The setter function accepts an object or a function as argument.

When passed an object, it will overwrite the existing query string with the object provided.

When passed a function, it will use the return value of this function to overwrite the existing query string. The functions receives the current parsed query string as argument. You can use this to make selective changes to the query string. E.g.: to only update the search query but keep the rest of the query string: setQueryString(x => ({ ...x, search: 'hello' })).

Without SSR

import { useQueryString } from '@kaliber/use-query-string'

function Component() {
  const [{ search: searchQuery = '' }, setQueryString] = useQueryString()
  const [input, setInput] = React.useState(null)

  React.useEffect(
    () => { setInput(searchQuery) },
    [searchQuery]
  )

  return (
    <form onSubmit={handleSubmit}>
      {search
        ? <h1>You've searched for '{searchQuery}'</h1>
        : <h1>Search</h1>
      }
      <input type='text' value={input} onChange={e => setInput(e.currentTarget.value)} name='search' />
      <button type='submit'>Apply search query</button>
    </form>
  )

  function handleSubmit(e) {
    e.preventDefault()
    setQueryString(x => ({ ...x, search: input }))
  }
}

With SSR

Wrap you application in a QueryStringProvider, which you provide with the known search string. If you're using express that would be req.location.search. Because search is now correctly set on the first render, you can safely use it as the default value for input.

import { QueryStringProvider, useQueryString } from '@kaliber/use-query-string'

function AppWithProviders({ search }) {
  return (
    <QueryStringProvider {...{ search }}>
      <App />
    </QueryStringProvider>
  )
}


function Component() {
  const [{ search: searchQuery = '' }, setQueryString] = useQueryString()
  const [input, setInput] = React.useState(searchQuery)

  return (
    <form onSubmit={handleSubmit}>
      {search
        ? <h1>You've searched for '{searchQuery}'</h1>
        : <h1>Search</h1>
      }
      <input type='text' value={input} onChange={e => setInput(e.currentTarget.value)} name='search' />
      <button type='submit'>Apply search query</button>
    </form>
  )

  function handleSubmit(e) {
    e.preventDefault()
    setQueryString(x => ({ ...x, search: input }))
  }
}

With a routing library

If you're using a routing library which manages the history for you, you can provide the QueryStringProvider with a custom update function. This allows you to wrap your routing libraries navigate function to keep it in sync with changes to the query string.

import { navigate } from 'your-favorite-routing-library'
import { QueryStringProvider, useQueryString } from '@kaliber/use-query-string'

function AppWithProviders({ search }) {
  return (
    <QueryStringProvider update={updateQueryString} {...{ search }}>
      <App />
    </QueryStringProvider>
  )
}

function updateQueryString({ query, queryString }) {
  navigate([window.location.pathname, queryString].join('?'), {
    state: query,
    replace: true
  })
}

🚨 Caution: Functions cannot be passed from a server side context to a client side one. So make sure to import your custom import function in your client wrapper as well and pass it to the QueryStringProvider again.

You can also use this if you really, really want to use history.pushState instead of history.replaceState.

Configuring query-string

Default options

{
  parse: {
    arrayFormat: 'bracket'
  },
  stringify: {
    skipEmptyString: true, 
    skipNull: true, 
    arrayFormat: 'bracket'
  }
}

Providing & sharing options

Normally, the default options should be sufficient, but should you wish to provide your own options for query-string, you can do so by providing them to the QueryStringProvider.

🚨 Caution: make sure this is a stable object! The easiest way to do this is to define it outside of your component:

import { navigate } from 'your-favorite-routing-library'
import { QueryStringProvider, useQueryString } from '@kaliber/use-query-string'

const options = {
  stringify: { arrayFormat: 'comma', skipEmptyString: false, skipNull: false },
  parse: { arrayFormat: 'comma' }
}

function AppWithProviders({ search }) {
  return (
    <QueryStringProvider {...{ search }}>
      <App />
    </QueryStringProvider>
  )
}

Sometimes you'll want to use query-string in parallel, for instance when generating links with query strings. In that case you should make sure you always use the same options for both. You can either provide query-string with options imported from a shared location, or import the default options used by @kaliber/use-query-string and use those in your qs.parse an qs.stringify calls.

import qs from 'query-string'
import { defaultOptions as options } from '@kaliber/use-query-string'

function Component(query = {}) {
  const url = '?' + qs.stringify(query, options.stringify)

  return (
    <div>
      <Link to={url}>Link</Link>
    </div>
  )
}

or

import { queryStringOptions } from '/some-shared-location'
import { QueryStringProvider, useQueryString } from '@kaliber/use-query-string'

function AppWithProviders({ search }) {
  return (
    <QueryStringProvider options={queryStringOptions} {...{ search }}>
      <App />
    </QueryStringProvider>
  )
}

---

Disclaimer

This library is intended for internal use, we provide no support, use at your own risk.

This library is not transpiled.