// Selecting class(es):
var myElement = $(".myelement");

// Selecting id(s).
var myElement = $("#myelement");

var myElement = $(".myelement");

// Check if the element has class
var hasclass = myElement.hasClass("hasthisclass"); // Returns boolean[true|false]

// Remove class(es)
myElement.removeClass("removethisclass"); 
myElement.removeClass("removethisclass andremovethisclass thistoo"); // Can remove multiple classes at once

// Add class(es)
myElement.addClass("addthisclass");
myElement.addClass("addthisclass andthisclass"); // Can add multiple classes at once
myElement.addClass("addthisclass").addClass("addthistoo"); // Multiple functions supported

// Toggle class
myElement.toggleClass("togglethis");

var myElement = $(".myelement");

// Show element(s)
myElement.show();

// Hide element(s)
myElement.hide();

// Remove element(s) completely
myElement.remove();

// Change css
myElement.css("background-color: #FAFAFA; color: #333;");

var myElement = $(".myelement");

// Add event
myElement.on("click", function() {
   // Do something
});

// Remove event
myElement.off("click", function() {
   // Do something
});

// Click shortcut
myElement.click(function() {
   // Do something when clicked
});

// Get JSON file
$.ajax({url: "example.json", onsuccess: jsonSuccessFunction, onerror: ajaxError });

// Get HTML file
$.ajax({url: "example.html", onsuccess: htmlSuccess, onerror: ajaxError });

// Post
$.ajax({url: "target.php", type: "POST", data: {user: "Indloon", password: "DidyoureallyathinkIwouldtypemypasswordhere?"}, onsuccess: jsonSuccessFunction, onerror: ajaxError });

// Functions used in ajax query.
var htmlSuccess = function() {
   // Do something
};

var jsonSuccessFunction = function() {
   // Do something
};

var ajaxError = function() {
   // Do something
};