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@amantheroot
Created February 1, 2019 19:19
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JavaScript DOM Manipulation cheat sheet by Traversy Media
// EXAMINE THE DOCUMENT OBJECT //
// console.dir(document);
// console.log(document.domain);
// console.log(document.URL);
// console.log(document.title);
// //document.title = 123;
// console.log(document.doctype);
// console.log(document.head);
// console.log(document.body);
// console.log(document.all);
// console.log(document.all[10]);
// // document.all[10].textContent = 'Hello';
// console.log(document.forms[0]);
// console.log(document.links);
// console.log(document.images);
// GETELEMENTBYID //
// console.log(document.getElementById('header-title'));
// var headerTitle = document.getElementById('header-title');
// var header = document.getElementById('main-header');
// console.log(headerTitle);
// headerTitle.textContent = 'Hello';
// headerTitle.innerText = 'Goodbye';
// console.log(headerTitle.innerText);
// headerTitle.innerHTML = '<h3>Hello</h3>';
// header.style.borderBottom = 'solid 3px #000';
// GETELEMENTSBYCLASSNAME //
// var items = document.getElementsByClassName('list-group-item');
// console.log(items);
// console.log(items[1]);
// items[1].textContent = 'Hello 2';
// items[1].style.fontWeight = 'bold';
// items[1].style.backgroundColor = 'yellow';
// // Gives error
// //items.style.backgroundColor = '#f4f4f4';
// for(var i = 0; i < items.length; i++){
// items[i].style.backgroundColor = '#f4f4f4';
// }
// GETELEMENTSBYTAGNAME //
// var li = document.getElementsByTagName('li');
// console.log(li);
// console.log(li[1]);
// li[1].textContent = 'Hello 2';
// li[1].style.fontWeight = 'bold';
// li[1].style.backgroundColor = 'yellow';
// // Gives error
// //items.style.backgroundColor = '#f4f4f4';
// for(var i = 0; i < li.length; i++){
// li[i].style.backgroundColor = '#f4f4f4';
// }
// QUERYSELECTOR //
// var header = document.querySelector('#main-header');
// header.style.borderBottom = 'solid 4px #ccc';
// var input = document.querySelector('input');
// input.value = 'Hello World'
// var submit = document.querySelector('input[type="submit"]');
// submit.value="SEND"
// var item = document.querySelector('.list-group-item');
// item.style.color = 'red';
// var lastItem = document.querySelector('.list-group-item:last-child');
// lastItem.style.color = 'blue';
// var secondItem = document.querySelector('.list-group-item:nth-child(2)');
// secondItem.style.color = 'coral';
// QUERYSELECTORALL //
// var titles = document.querySelectorAll('.title');
// console.log(titles);
// titles[0].textContent = 'Hello';
// var odd = document.querySelectorAll('li:nth-child(odd)');
// var even= document.querySelectorAll('li:nth-child(even)');
// for(var i = 0; i < odd.length; i++){
// odd[i].style.backgroundColor = '#f4f4f4';
// even[i].style.backgroundColor = '#ccc';
// }
// TRAVERSING THE DOM //
var itemList = document.querySelector('#items');
// parentNode
// console.log(itemList.parentNode);
// itemList.parentNode.style.backgroundColor = '#f4f4f4';
// console.log(itemList.parentNode.parentNode.parentNode);
// parentElement
// console.log(itemList.parentElement);
// itemList.parentElement.style.backgroundColor = '#f4f4f4';
// console.log(itemList.parentElement.parentElement.parentElement);
// childNodes
// console.log(itemList.childNodes);
// console.log(itemList.children);
// console.log(itemList.children[1]);
// itemList.children[1].style.backgroundColor = 'yellow';
// // FirstChild
// console.log(itemList.firstChild);
// // firstElementChild
// console.log(itemList.firstElementChild);
// itemList.firstElementChild.textContent = 'Hello 1';
// lastChild
// console.log(itemList.lastChild);
// lastElementChild
// console.log(itemList.lastElementChild);
// itemList.lastElementChild.textContent = 'Hello 4';
// nextSibling
// console.log(itemList.nextSibling);
// // nextElementSibling
// console.log(itemList.nextElementSibling);
// previousSibling
// console.log(itemList.previousSibling);
// previousElementSibling
// console.log(itemList.previousElementSibling);itemList.previousElementSibling.style.color = 'green';
// createElement
// // Create a div
// var newDiv = document.createElement('div');
// // Add class
// newDiv.className= 'hello';
// // Add id
// newDiv.id = 'hello1';
// // Add attr
// newDiv.setAttribute('title', 'Hello Div');
// // Create text node
// var newDivText = document.createTextNode('Hello World');
// // Add text to div
// newDiv.appendChild(newDivText);
// var container = document.querySelector('header .container');
// var h1 = document.querySelector('header h1');
// console.log(newDiv);
// newDiv.style.fontSize = '30px';
// container.insertBefore(newDiv, h1);
// EVENTS //
// var button = document.getElementById('button').addEventListener('click', buttonClick);
// function buttonClick(e){
// //console.log('Button clicked');
// // document.getElementById('header-title').textContent = 'Changed';
// // document.querySelector('#main').style.backgroundColor = '#f4f4f4';
// //console.log(e);
// // console.log(e.target);
// // console.log(e.target.id);
// // console.log(e.target.className);
// // console.log(e.target.classList);
// // var output = document.getElementById('output');
// // output.innerHTML = '<h3>'+e.target.id+'</h3>';
// // console.log(e.type);
// //console.log(e.clientX);
// //console.log(e.clientY);
// //console.log(e.offsetX);
// //console.log(e.offsetY);
// // console.log(e.altKey);
// // console.log(e.ctrlKey);
// // console.log(e.shiftKey);
// }
var button = document.getElementById('button');
var box = document.getElementById('box');
//button.addEventListener('click', runEvent);
//button.addEventListener('dblclick', runEvent);
//button.addEventListener('mousedown', runEvent);
//button.addEventListener('mouseup', runEvent);
//box.addEventListener('mouseenter', runEvent);
//box.addEventListener('mouseleave', runEvent);
//box.addEventListener('mouseover', runEvent);
//box.addEventListener('mouseout', runEvent);
// box.addEventListener('mousemove', runEvent);
var itemInput = document.querySelector('input[type="text"]');
var form = document.querySelector('form');
var select = document.querySelector('select');
// itemInput.addEventListener('keydown', runEvent);
// itemInput.addEventListener('keyup', runEvent);
// itemInput.addEventListener('keypress', runEvent);
// itemInput.addEventListener('focus', runEvent);
// itemInput.addEventListener('blur', runEvent);
// itemInput.addEventListener('cut', runEvent);
// itemInput.addEventListener('paste', runEvent);
// itemInput.addEventListener('input', runEvent);
// select.addEventListener('change', runEvent);
// select.addEventListener('input', runEvent);
form.addEventListener('submit', runEvent);
function runEvent(e){
e.preventDefault();
console.log('EVENT TYPE: '+e.type);
//console.log(e.target.value);
// document.getElementById('output').innerHTML = '<h3>'+e.target.value+'</h3>';
// output.innerHTML = '<h3>MouseX: '+e.offsetX+' </h3><h3>MouseY: '+e.offsetY+'</h3>';
// document.body.style.backgroundColor = "rgb("+e.offsetX+","+e.offsetY+", 40)";
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
<title>Item Lister</title>
</head>
<body>
<header id="main-header" class="bg-success text-white p-4 mb-3">
<div class="container">
<h1 id="header-title">Item Lister <span style="display:none">123</span></h1>
</div>
</header>
<div class="container">
<div id="main" class="card card-body">
<h2 class="title">Add Items</h2>
<form class="form-inline mb-3">
<input type="text" class="form-control mr-2">
<select class="form-control mr-2">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<input type="submit" class="btn btn-dark" value="Submit">
</form>
<h2 class="title">Items</h2>
<ul id="items" class="list-group">
<li class="list-group-item">Item 1</li>
<li class="list-group-item">Item 2</li>
<li class="list-group-item">Item 3</li>
<li class="list-group-item">Item 4</li>
</ul>
<div id="output"></div>
<br>
<button class="btn btn-dark btn-block" id="button">Click Here</button>
<br>
<div id="box" style="width:400px;height:200px;background:#f4f4f4"><h3>HELLO</h3></div>
</div>
</div>
<script src="dom.js"></script>
</body>
</html>
@Arjuncse07
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Very Helpful thanks !!

@hardikluhar97
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Helpful, Thanks

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