Query String Manipulator

Effortlessly manipulate query string parameters into your desired URL. You pass url and a set of actions to be done to QSM and you get you URL string back.

Install

QSM is written for ES modules

npm install query-string-manipulator

Usage

Lets assume that you already have it imported

import qsm from 'query-string-manipulator';

Set parameters

Lets say that you want to add page number to a search result.

qsm('https://www.google.cz/search?q=hello+world', {
  set: {
    num: 20,
  }
});
// https://www.google.cz/search?q=hello+world&num=20

It also works if the page number is already set

qsm('https://www.google.cz/search?q=hello+world&num=20', {
  set: {
    num: 40,
  }
});
// https://www.google.cz/search?q=hello+world&num=40

It also works when passing a parameter as an array.

qsm('https://www.google.cz/search?q=hello+world&num=20', {
  set: {
    num: [20, 40, 60],
  }
});
// https://www.google.cz/search?q=hello+world&num=20&num=40&num=60

Remove parameters

Say that you now want to go back to first page

qsm('https://www.google.cz/search?q=hello+world&num=20', {
  remove: ['num']
});
// https://www.google.cz/search?q=hello+world

Or go to the empty search page

qsm('https://www.google.cz/search?q=hello+world&num=20', {
  remove: ['q', 'num']
});
// https://www.google.cz/search

Toggle parameters

Say that you have a button on your page that enables filter and disables it when you click it again.

qsm('https://www.google.cz/search?q=hello+world&num=20', {
  toggle: {
    tbm: 'isch',
  }
});
// https://www.google.cz/search?q=hello+world&num=20&tbm=isch

qsm('https://www.google.cz/search?q=hello+world&num=20&tbm=isch', {
  toggle: {
    tbm: 'isch',
  }
});
// https://www.google.cz/search?q=hello+world&num=20

Constants

If you like "symbols", you can go like this:

import qsm, {
  URL_REMOVE, // Used for remove
  URL_SET, // Used for set
  URL_TOGGLE, // Used for toggle
} from 'query-string-manipulator';

qsm('http://example.com/', {
  [URL_REMOVE]: ['test'],
  [URL_TOGGLE]: {
    foo: 'bar',
  },
  [URL_SET]: {
    xxx: '123',
  },
})

Support methods

But wait, there is more!

Getting URL params

Method getUrlParams returns list of all parameters in form of array of objects. It cannot be returned in form of key-pair values because there can be multiple same name query params.

getUrlParams('https://example.com/foo?select=users&getId=10')

/* returns
[
  {
    key: 'select',
    value: 'users'
  },
  {
    key: 'getId',
    value: '10',
  }
]
*/

Resolve URL params

Method resolveUrlParams returns parameters after changed by user specified actions.

const urlParams = [
  {
    key: 'select',
    value: 'users'
  },
  {
    key: 'getId',
    value: '10'
  }
];
const paramActions = {
  remove: ['getId'],
  set: {
    select: 'userGroups',
  },
};
resolveUrlParams(urlParams, paramActions)

/* returns
[
  {
    key: 'select',
    value: 'userGroups'
  }
]
*/

Putting params together

Method constructUrlParams returns query string part of the URL from parameters.

constructUrlParams([
  {
    key: 'select',
    value: 'users'
  },
  {
    key: 'getId',
    value: '10'
  }
])

// returns "select=users&getId=10"