Скачать или смотреть Lecture 13: DOM: Arrays , Objects || forEach Practicing || createElement , appendChilld

Overview
In this lecture, we will delve deeper into the use of JavaScript Arrays and Objects, which are fundamental data structures for organizing and manipulating data. We will also cover practical applications of the forEach method for iterating over arrays. Additionally, we will explore how to dynamically manipulate the DOM using methods like createElement and appendChild.

Part 1: Arrays and Objects
Arrays:

Arrays are ordered collections of items that can be accessed by their index.
They provide various methods to manipulate data such as adding, removing, and iterating over elements.
Objects:

Objects are collections of key-value pairs, allowing the storage and retrieval of data using named keys.
They are useful for representing complex data structures and entities.
Part 2: Practicing with forEach
The forEach method is an array method that allows you to execute a provided function once for each array element.
It is a simple and effective way to iterate over arrays and perform operations on each element without the need for a traditional for loop.
Part 3: DOM Manipulation with createElement and appendChild
createElement:

The createElement method creates a new HTML element specified by the tag name passed to it.
This is essential for dynamically adding new elements to the web page.
appendChild:

The appendChild method adds a node to the end of the list of children of a specified parent node.
It is used to insert the newly created elements into the DOM, making them part of the visible web page.
Summary
By the end of this lecture, students will have a solid understanding of how to work with arrays and objects in JavaScript, how to efficiently iterate over array elements using the forEach method, and how to dynamically manipulate the DOM by creating and appending new elements. This knowledge will enable students to create interactive and data-driven web applications.