JavaScript find child element code example

Example 1: get child element by class javascript

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

Example 2: javascript get child by name

let myForm = document.getElementById('form');

let child = myForm.querySelector('input[name="username"]');

console.log(child);

Example 3: get child of child javascript

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