JAVASCRIPT

select all children javascript

/* SELECT using PARENT.childNodes */
let allChildren = document.querySelector("#parentSelector").childNodes

/* PRINT */
for(let i=0; i < allChildren.length; i++) {
         console.log("Child #", i + 1, allChildren[i])
}

javascript get all child elements

var child_element = document.querySelector("#id").children[0];
//Where # defines id and '.' a class. And 0 argument the first child element
var child_element = document.querySelector("#id").children //get all children

get all child element of class javascript

var parent = document.getElementById('test');
var children = parent.getElementsByClassName('four');