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JavaScript from Beginner to Professional

You're reading from   JavaScript from Beginner to Professional Learn JavaScript quickly by building fun, interactive, and dynamic web apps, games, and pages

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Product type Paperback
Published in Dec 2021
Publisher Packt
ISBN-13 9781800562523
Length 546 pages
Edition 1st Edition
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Authors (4):
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Codestars By Rob Percival Codestars By Rob Percival
Author Profile Icon Codestars By Rob Percival
Codestars By Rob Percival
Laurence Svekis Laurence Svekis
Author Profile Icon Laurence Svekis
Laurence Svekis
Maaike van Putten Maaike van Putten
Author Profile Icon Maaike van Putten
Maaike van Putten
Rob Percival Rob Percival
Author Profile Icon Rob Percival
Rob Percival
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Toc

Table of Contents (19) Chapters Close

Preface 1. Getting Started with JavaScript FREE CHAPTER 2. JavaScript Essentials 3. JavaScript Multiple Values 4. Logic Statements 5. Loops 6. Functions 7. Classes 8. Built-In JavaScript Methods 9. The Document Object Model 10. Dynamic Element Manipulation Using the DOM 11. Interactive Content and Event Listeners 12. Intermediate JavaScript 13. Concurrency 14. HTML5, Canvas, and JavaScript 15. Next Steps 16. Other Books You May Enjoy
17. Index
Appendix – Practice Exercise, Project, and Self-Check Quiz Answers

Creating new elements

In this chapter, you have seen so many cool ways to manipulate the DOM already. There is still an important one missing, the creation of new elements and adding them to the DOM. This consists of two steps, first creating new elements and second adding them to the DOM.

This is not as hard as it may seem. The following JavaScript does just that:

let el = document.createElement("p");
el.innerText = Math.floor(Math.random() * 100);
document.body.appendChild(el);

It creates an element of type p (paragraph). This is a createElement() function that is on the document object. Upon creation, you need to specify what type of HTML element you would want to create, which in this case is a p, so something like this:

<p>innertext here</p>

And as innerText, it is adding a random number. Next, it is adding the element as a new last child of the body. You could also add it to another element; just select the element you want to...

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