js-dom-selectors.js

// vanilla javascript
var someId = document.getElementById("name-of-div"); // returns one element by id 
var someId2 = document.querySelector("#name-of-div"); // returns one element using CSS selector syntax
// Jquery
var someId2 = $("#name-of-div"); // returns one element with new jquery methods using CSS selector syntax 

// vanilla javascript
var someClass = document.getElementsByTagClassName("name-of-class"); // returns an array-like list of elements
//Jquery
var someClasses = document.querySelectorAll(".name-of-class"); // returns an array-like list of elements 
var someClasses = $(".name-of-class"); // returns an array-like list of elements with new jquery methods