Description of the querystring.stringify method in node.js

Method description:

Converts an object to a string in which multiple arguments are separated by '&' and assigned by' ='.

The operation of this function and (link: #) is the opposite, you can see the specific example.

Grammar:

querystring.stringify(obj, [sep], [eq])

Receiving parameters:

Obj                                                                                Object to be converted
Sep                                                                              Set the separator to '&' by default
Eq                                                                                  Set the assignment character to '=' by default

Example:

querystring.stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' }) 

// returns 

'foo=bar&baz=qux&baz=quux&corge=' 

 

querystring.stringify({foo: 'bar', baz: 'qux'}, ';', ':') 

// returns 

'foo:bar;baz:qux'

Source:

QueryString.stringify = QueryString.encode = function(obj, sep, eq, name) {

  sep = sep || '&';

  eq = eq || '=';

  if (util.isNull(obj)) {

    obj = undefined;

  }

  if (util.isObject(obj)) {

    return Object.keys(obj).map(function(k) {

      var ks = QueryString.escape(stringifyPrimitive(k)) + eq;

      if (util.isArray(obj[k])) {

        return obj[k].map(function(v) {

          return ks + QueryString.escape(stringifyPrimitive(v));

        }).join(sep);

      } else {

        return ks + QueryString.escape(stringifyPrimitive(obj[k]));

      }

    }).join(sep);

  }

  if (!name) return '';

  return QueryString.escape(stringifyPrimitive(name)) + eq +

         QueryString.escape(stringifyPrimitive(obj));

};