Week 5 JavaScript

Week 5: JavaScript Part 1

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JavaScript is a scripting language used to create dynamic content on web pages. It can interact with HTML and CSS to enhance user experiences

JS code is between <script> and </script> tags

Scripts can be placed in the <body>, or in the <head> section of an HTML page
JS is better to put at the end of <body> section,
Saved in external files and access an external script

<script src = "" ></script>

JavaScript command lines end with a semicolon to separate it from the next command line in the program

1.1 Write JS within HTML file

1.2 Write JS in external file

Variables are used to store values: const, var, let,

The 'var' was used in JS from 1995 to 2015, now should only be used in code for older browsers
The 'let' and 'const' was added to JS in 2015
Always use const if the value should not be changed

The variables

An array is a data structure that allows you to store multiple values in a single variable
Arrays are useful for managing lists of items, such as numbers, strings, or objects.

You can create an array using the [] syntax or the Array() constructor.

A JS function is a reusable block of code designed to perform a particular task

Functions allow developers to organize the reuse code efficiently

function name(parameter1, parameter2,...){

code to be executed

}

name();

Embedding a function into an HTML element in JavaScript involves setting up event handlers that call a function when the user interacts with the element.
This allows you to dynamically change or update the content or behavior of the webpage based on user actions.