How To Turn An Object Into Query String Parameters In Javascript

If you’re using a modern browser (or node) you can use map to create an array of strings like a=1, then use join to join them together with &.

ES6

var queryString = Object.keys(params).map(key => key + '=' + params[key]).join('&');

ES5

var queryString = Object.keys(params).map(function(key) {
    return key + '=' + params[key]
}).join('&');

If you’re the sort of person who uses jQuery, you’ve got a solution readily available:

var queryString = $.param(params);

If you’re using node, you can use the querystring module:

const querystring = require('querystring');

let queryString = querystring.stringify(params);

If you know you’re keys and values need to be encoded, you should use encodeURIComponent like this:

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

It’s also possible to query by timestamp in MySQL.