class Utils {

    $(className) {
        return document.querySelector(className);
    }

    _(className) {
        return document.querySelectorAll(className);
    }


    click(className, callback, type = "click",) {
        $(`${className}`)[`on${type}`] = (event) => {
            callback(event)
        }
    }

    query(name) {
        var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
        var r = window.location.search.substr(1).match(reg);
        if (r != null)
            return unescape(r[2]);
        return null;
    }

    customMethods() {
        Element.prototype.add = function(className) {
            this.classList.add(className)
        }

        Element.prototype.remove = function(className) {
            this.classList.remove(className)
        }

        Element.prototype.none = function() {
            this.style.display = "none"
        }

        Element.prototype.show = function() {
            this.style.display = "block"
        }

        Element.prototype.toggle = function() {
           if (this.style.display == "none") {
            this.style.display = "block"
           } else {
             this.style.display = "none"
           }
        }
    }


}

let { $, _, click, customMethods, query } = new Utils()
customMethods()