Answers for "get child node of class"

get child element by class javascript

var element = document.querySelector('#Element');
var elementChildren = element.querySelectorAll('.Element-child');

get child of child javascript

// HazaaZOOZ - javascript - How to get child of child javascript

var li = document.querySelector("li");
var number = 13;
li.children[0].children[0].innerHTML = number;