JavaScript mendapatkan elemen berdasarkan kelas
var elementsArray = document.getElementsByClassName("someclassname");
Grepper
var elementsArray = document.getElementsByClassName("someclassname");
var selector = document.getElementsByClassName('class-name');
var elementsArray = document.getElementsByClassName("student.age");
var elementsArray = document.getElementsByClassName("student");
var elementsArray = document.getElementsByClassName("age");