http-querystring-stringify

Simple, small and correct querystring serialization-only for the browser or
server.

This package is intended for client side code or input data which structure is
defined by the application. It has no DoS protection and simplicity and
correctness is prioritized over performance.

If you need extreme performance you should consider
https://github.com/petkaantonov/querystringparser.

This package was written because serialization seems to happen most often on the
client as a single operation and similar performance-focused libraries had
trade-offs and bugs while others carried huge dependencies.

``js
const {stringify, appendToUrl} = require('http-querystring-stringify')

stringify({
first: 'John',
last: 'Wayne',
})
// -> first=John&last=Wayne

stringify({
brands: ['KitKat', 'Snickers', 'Bounty'],
})
// -> brands[]=KitKat&brands[]=Snickers&brands[]=Bounty

stringify({
sites: [{name: 'facebook', color: 'blue'}],
})
// -> sites[0][name]=facebook&sites[0][color]=blue

appendToUrl('https://google.com', {
first: 'John',
last: 'Wayne',
})
// -> https://google.com?first=John&last=Wayne
appendToUrl('https://google.com', {
key: undefined,
})
// -> https://google.com
`

- toJSON is respected (like JSON.stringify does)
- true and false are converted to y or n respectively
- null is represented by an empty string
- undefined values will be skipped completely (like JSON.stringify does)
- arrays will be numbered only if they contain arrays or objects themselves

Compatibility with parsers

Generally there are two types of parsers: those supporting extended nesting and
those that just support repeated keys.

$3

- querystringparser (read
open issues)
- qs

`js
const input = {
a: '',
b: 's',
c: ['1', '2', '3'],
d: '&=[]',
e: ['1', '2', ['3', '4']],
f: ['1', {a: '1'}],
}

// deepEqual(parse(stringify(input)), input)
// -> true
`

$3

- Node.js built-in
- URI.js

`js
parse(
stringify({
a: '',
b: 's',
c: ['1', '2', '3'],
d: '&=[]',
e: ['1', '2', ['3', '4']],
f: ['1', {a: '1'}],
})
)
// -> {
// a: '',
// b: 's',
// d: '&=[]',

// // expect arrays to be collapsed like this
// 'c[]': [ '1', '2', '3' ],

// // expect objects and multi-level arrays to be flattened like this
// 'e[0]': '1',
// 'e[1]': '2',
// 'e[2][]': [ '3', '4' ],
// 'f[0]': '1',
// 'f[1][a]': '1',
// }
``