query-string2
v0.1.2
Published
Parse and stringify URL query strings
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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});
//=> ''