JAVASCRIPT

js query string from object

const params = {lat: 35.681236, lng: 139.767125, zoom: 15};
new URLSearchParams(params).toString();
// "lat=35.681236&lng=139.767125&zoom=15"

// OR

const queryString = Object.keys(params).map(key => {
  encodeURIComponent(key) + '=' + encodeURIComponent(params[key])
}).join('&');

object to query string javascript

const queryString = Object.keys(params).map(key => {
  encodeURIComponent(key) + '=' + encodeURIComponent(params[key])
}).join('&');

object to query string js

const obj = {foo: "hi there", bar: "100%" };
const params = new URLSearchParams(obj).toString();

query string to object javascript

Object.fromEntries(new URLSearchParams(query.filter))

js create query string from object

new URLSearchParams(object).toString()

query string to object javascript

function paramsToObject(entries) {
  const result = {}
  for(const [key, value] of entries) { // each 'entry' is a [key, value] tupple
    result[key] = value;
  }
  return result;
}

query string to object javascript

var search = location.search.substring(1);
JSON.parse('{"' + search.replace(/&/g, '","').replace(/=/g,'":"') + '"}', function(key, value) { return key===""?value:decodeURIComponent(value) })

javascript object to query string

queryBuilder = function(obj, prefix) {
  var str = [],
    p;
  for (p in obj) {
    if (obj.hasOwnProperty(p)) {
      var k = prefix ? prefix + "[" + p + "]" : p,
        v = obj[p];
      str.push((v !== null && typeof v === "object") ?
        serialize(v, k) :
        encodeURIComponent(k) + "=" + encodeURIComponent(v));
    }
  }
  return str.join("&");
}

console.log(
serialize({
  foo: "hi there",
  bar: {
    blah: 123,
    quux: [1, 2, 3]
  }
})
);