[removed].search query as JSON

Question

Is there a better way to convert a URL\'s location.search as an object? Maybe just more efficient or trimmed down? I\'m using jQuery, but pure JS can work too.

Answer 1

Here's a pure JS function. Parses the search part of the current URL and returns an object. (It's a bit verbose for readability, mind.)

function searchToObject() {
  var pairs = window.location.search.substring(1).split("&"),
    obj = {},
    pair,
    i;

  for ( i in pairs ) {
    if ( pairs[i] === "" ) continue;

    pair = pairs[i].split("=");
    obj[ decodeURIComponent( pair[0] ) ] = decodeURIComponent( pair[1] );
  }

  return obj;
}

On a related note, you're not trying to store the single parameters in "a JSON" but in "an object". ;)

Answer 2

If you are using modern browser this produce the same result as accepted answer:

function searchToObject(search) {
  return search.substring(1).split("&").reduce(function(result, value) {
    var parts = value.split('=');
    if (parts[0]) result[decodeURIComponent(parts[0])] = decodeURIComponent(parts[1]);
    return result;
  }, {})
}

Answer 3

Just wanted to share this solution using a bit of ESNext and a reducer.

It does pretty much the same suggested by @Carlo but it's a bit cleaner if you're comfortable with ES6 and reducers.

const urlSearchData = searchString => {
    if (!searchString) return false;

    return searchString
        .substring(1)
        .split('&')
        .reduce((result, next) => {
            let pair = next.split('=');
            result[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);

            return result;
        }, {});
};

const searchData = urlSearchData(window.location.search);

Answer 4

JSON Parse after stringify does the job of converting to a json with array data.

?key1=val1&key2[]=val2.1&key2[]=val2.2&key2[]=val2.3&

{
     'key1' : 'val1',
     'key2' : [ 'val2.1', 'val2.2', 'val2.3' ]
}

function QueryParamsToJSON() {            
    var list = location.search.slice(1).split('&'),
        result = {};

    list.forEach(function(keyval) {
        keyval = keyval.split('=');
        var key = keyval[0];
        if (/\[[0-9]*\]/.test(key) === true) {
            var pkey = key.split(/\[[0-9]*\]/)[0];
            if (typeof result[pkey] === 'undefined') {
                result[pkey] = [];
            }
            result[pkey].push(decodeURIComponent(keyval[1] || ''));
        } else {
            result[key] = decodeURIComponent(keyval[1] || '');
        }
    });

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

var query_string = QueryParamsToJSON();

Answer 5

My approach, simple and clean

var params = "?q=Hello World&c=Awesome";

params = "{\"" + 
         params
         .replace( /\?/gi, "" )
         .replace( /\&/gi, "\",\"" )
         .replace( /\=/gi, "\":\"" ) +
         "\"}";
  
params = JSON.parse( params );

alert( decodeURIComponent( params.q ) );
alert( decodeURIComponent( params.c ) );

Answer 6

Please also note that there's an api to query/manipulate search params with: https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams

var params = new URLSearchParams(window.location.search)
for (let p of params) {
  console.log(p);
}