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query-string2

v0.1.2

Published

Parse and stringify URL query strings

Downloads

2

Readme

This package is fork "query strings" which canceled issues 47 because it is not logical and should be treated differently ant sources are also copied to TypeScript

Parse and stringify URL query strings

Install

$ npm install query-string2 -save

Usage

const queryString = require('query-string2');

console.log(location.search);
//=> '?foo=bar'

const parsed = queryString.parse(location.search);
console.log(parsed);
//=> {foo: 'bar'}

console.log(location.hash);
//=> '#token=bada55cafe'

const parsedHash = queryString.parse(location.hash);
console.log(parsedHash);
//=> {token: 'bada55cafe'}

parsed.foo = 'unicorn';
parsed.ilike = 'pizza';

const stringified = queryString.stringify(parsed);
//=> 'foo=unicorn&ilike=pizza'

location.search = stringified;
// note that `location.search` automatically prepends a question mark
console.log(location.search);
//=> '?foo=unicorn&ilike=pizza'

API

.parse(string, [options])

Parse a query string into an object. Leading ? or # are ignored, so you can pass location.search or location.hash directly.

The returned object is created with Object.create(null) and thus does not have a prototype.

URI components are decoded with decode-uri-component.

arrayFormat

Type: string Default: 'none'

Supports both index for an indexed array representation or bracket for a bracketed array representation.

  • bracket: stands for parsing correctly arrays with bracket representation on the query string, such as:
queryString.parse('foo[]=1&foo[]=2&foo[]=3', {arrayFormat: 'bracket'});
//=> foo: [1,2,3]
  • index: stands for parsing taking the index into account, such as:
queryString.parse('foo[0]=1&foo[1]=2&foo[3]=3', {arrayFormat: 'index'});
//=> foo: [1,2,3]
  • none: is the default option and removes any bracket representation, such as:
queryString.parse('foo=1&foo=2&foo=3');
//=> foo: [1,2,3]

.stringify(object, [options])

Stringify an object into a query string, sorting the keys.

strict

Type: boolean Default: true

Strictly encode URI components with strict-uri-encode. It uses encodeURIComponent if set to false. You probably don't care about this option.

encode

Type: boolean Default: true

URL encode the keys and values.

arrayFormat

Type: string Default: 'none'

Supports both index for an indexed array representation or bracket for a bracketed array representation.

  • bracket: stands for parsing correctly arrays with bracket representation on the query string, such as:
queryString.stringify({foo: [1,2,3]}, {arrayFormat: 'bracket'});
// => foo[]=1&foo[]=2&foo[]=3
  • index: stands for parsing taking the index into account, such as:
queryString.stringify({foo: [1,2,3]}, {arrayFormat: 'index'});
// => foo[0]=1&foo[1]=2&foo[3]=3
  • none: is the default option and removes any bracket representation, such as:
queryString.stringify({foo: [1,2,3]});
// => foo=1&foo=2&foo=3

.extract(string)

Extract a query string from a URL that can be passed into .parse().

Nesting

This module intentionally doesn't support nesting as it's not spec'd and varies between implementations, which causes a lot of edge cases.

You're much better off just converting the object to a JSON string:

queryString.stringify({
	foo: 'bar',
	nested: JSON.stringify({
		unicorn: 'cake'
	})
});
//=> 'foo=bar&nested=%7B%22unicorn%22%3A%22cake%22%7D'

However, there is support for multiple instances of the same key:

queryString.parse('likes=cake&name=bob&likes=icecream');
//=> {likes: ['cake', 'icecream'], name: 'bob'}

queryString.stringify({color: ['taupe', 'chartreuse'], id: '515'});
//=> 'color=chartreuse&color=taupe&id=515'

Falsy values

Sometimes you want to unset a key, or maybe just make it present without assigning a value to it. Here is how falsy values are stringified:

queryString.stringify({foo: false});
//=> 'foo=false'

queryString.stringify({foo: null});
//=> 'foo'

queryString.stringify({foo: undefined});
//=> ''