select all elements with class javascript code example

Example 1: javascript get element by class

var elementsArray = document.getElementsByClassName("someclassname");

Example 2: javascript get all elements with class

const allElementContainGrepperClassName = document.querySelectorAll('.grepper');
// => return array of all elements 

const firstElementContainGrepperClassName = document.querySelector('.grepper');

Example 3: javascript select all elements

// example:
document.querySelectorAll('.message');

// syntax:
// document.querySelectorAll('.<class-name>')