To create an HTML element we use tag name. Creating an HTML element using JavaScript is very simple and straight forward. We use the method document.createElement(). The method takes an HTML element tag name as a string parameter.
// syntax
document.createElement('tagname')<!DOCTYPE html>
<html>
<head>
<title>Document Object Model:30 Days Of JavaScript</title>
</head>
<body>
<script>
let title = document.createElement('h1')
title.className = 'title'
title.style.fontSize = '24px'
title.textContent = 'Creating HTML element DOM Day 2'
console.log(title)
</script>
</body>
</html>To create multiple elements we should use loop. Using loop we can create as many HTML elements as we want. After we create the element we can assign value to the different properties of the HTML object.
<!DOCTYPE html>
<html>
<head>
<title>Document Object Model:30 Days Of JavaScript</title>
</head>
<body>
<script>
let title
for (let i = 0; i < 3; i++) {
title = document.createElement('h1')
title.className = 'title'
title.style.fontSize = '24px'
title.textContent = i
console.log(title)
}
</script>
</body>
</html>To see a created element on the HTML document we should append it to the parent as a child element. We can access the HTML document body using document.body. The document.body support the appendChild() method. See the example below.
<!DOCTYPE html>
<html>
<head>
<title>Document Object Model:30 Days Of JavaScript</title>
</head>
<body>
<script>
// creating multiple elements and appending to parent element
let title
for (let i = 0; i < 3; i++) {
title = document.createElement('h1')
title.className = 'title'
title.style.fontSize = '24px'
title.textContent = i
document.body.appendChild(title)
}
</script>
</body>
</html>After creating an HTML, we may want to remove element or elements and we can use the removeChild() method.
Example:
<!DOCTYPE html>
<html>
<head>
<title>Document Object Model:30 Days Of JavaScript</title>
</head>
<body>
<h1>Removing child Node</h1>
<h2>Trishan Wagle challenges in 2023</h1>
<ul>
<li>30DaysOfPython Challenge Done</li>
<li>30DaysOfJavaScript Challenge Done</li>
<li>30DaysOfReact Challenge Coming</li>
<li>30DaysOfFullStack Challenge Coming</li>
<li>30DaysOfDataAnalysis Challenge Coming</li>
<li>30DaysOfReactNative Challenge Coming</li>
<li>30DaysOfMachineLearning Challenge Coming</li>
</ul>
<script>
const ul = document.querySelector('ul')
const lists = document.querySelectorAll('li')
for (const list of lists) {
ul.removeChild(list)
}
</script>
</body>
</html>As we have see in the previous section there is a better way to eliminate all the inner HTML elements or the children of a parent element using the method innerHTML properties.
<!DOCTYPE html>
<html>
<head>
<title>Document Object Model:30 Days Of JavaScript</title>
</head>
<body>
<h1>Removing child Node</h1>
<h2>Trishan Wagle challenges in 2023</h1>
<ul>
<li>30DaysOfPython Challenge Done</li>
<li>30DaysOfJavaScript Challenge Done</li>
<li>30DaysOfReact Challenge Coming</li>
<li>30DaysOfFullStack Challenge Coming</li>
<li>30DaysOfDataAnalysis Challenge Coming</li>
<li>30DaysOfReactNative Challenge Coming</li>
<li>30DaysOfMachineLearning Challenge Coming</li>
</ul>
<script>
const ul = document.querySelector('ul')
ul.innerHTML = ''
</script>
</body>
</html>The above snippet of code cleared all the child elements.
🌕 You are so special, you are progressing everyday. Now, you knew how to destroy a created DOM element when it is needed. You learned DOM and now you have the capability to build and develop applications. You are left with only nine days to your way to greatness.