query-string 
Parse and stringify URL query strings
Install
$ npm install --save query-string
Usage
const queryString = require('query-string');
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';
location.search = queryString.stringify(parsed);
console.log(location.search);
//=> '?foo=unicorn&ilike=pizza'API
.parse(string)
Parse a query string into an object. Leading ? or # are ignored, so you can pass location.search or location.hash directly.
.stringify(object)
Stringify an object into a query string, sorting the keys.
.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'License
MIT © Sindre Sorhus
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