cheatsheet parsing query string to json and vice versa in JS

parsing_query_string_json.js

function QueryStringToJSON(value) {            
    var pairs = value.split('&');
    
    var result = {};
    pairs.forEach(function(pair) {
        pair = pair.split('=');
        result[pair[0]] = decodeURIComponent(pair[1] || '');
    });

    return JSON.parse(JSON.stringify(result));
}

var json = QueryStringToJSON("key1=value1&key2=value2&key3=value3");

console.log(json)

function JSONToQueryString(value) {
  return Object.keys(value).map(key => key + '=' + value[key]).join('&');
}

var query_string = JSONToQueryString(json);

console.log(query_string)