var node = document.createElement('li');
var textNode = document.createTextNode('watermellon');
node.appendChild(textNode);
document.querySelector('ul').insertBefore(node, null);
var node = document.createElement("li");
var textNode = document.createTextNode("Watermellon");
node.appendChild(textNode);
var ul = document.querySelector('ul');
ul.insertBefore(node, document.querySelector('li:nth-child(3)'));
var node = document.createElement("li");
var textNode = document.createTextNode("Watermellon");
node.appendChild(textNode);
var li = document.querySelector('li:nth-child(1)');
var ul = document.querySelector('ul');
ul.insertBefore(li, document.querySelector('li:nth-child(5)'));
document.querySelectorAll('li.red')
.forEach(element => {
element.parentElement.removeChild(element)
});
[].slice.call(document.getElementsByClassName('red')).forEach(el => {
el.parentElement.removeChild(el);
});
var elements = document.getElementsByClassName('red')
for (let i = elements.length - 1; i >= 0; i--) {
elements[i].parentElement.removeChild(elements[i]);
}
document.querySelectorAll('section').forEach(el => {
if (el.querySelector('.blue') != null)
el.removeChild(el.querySelector('h2'));
});