const notes = document.querySelectorAll('.note');

const count = notes.length;

​

for (let i = 0; i < count; i++) {

    notes[i].style.backgroundColor = "yellow";

}

Code language: JavaScript (javascript)

const notes = document.querySelectorAll('.note');

​

notes.forEach((note) => {

    note.style.backgroundColor = 'yellow';

});

Code language: JavaScript (javascript)

[].forEach.call(notes, (note) => {

    note.style.backgroundColor = "yellow";

});

Code language: PHP (php)