js-basics-3

Module Description

This module is crafted to solidify the understanding of core JavaScript concepts. By reinforcing the knowledge of the language's building blocks, you will be equipped with the skills necessary to tackle more complex programming challenges and frameworks.

Strengthen JavaScript knowledge:

• Numbers methods
• Strings methods
• Functions
• Context, Scope and Closures

Front-end developers work extensively with JavaScript and other scripting languages, which are fundamental for creating interactive websites. Numbers, strings, and functions are core concepts in these languages, and here's why they are crucial for a front-end developer:

1. Numbers and Strings: These are basic data types in almost all programming languages. They are used to represent and manipulate data in a program.

• Numbers: They are used for calculations, and also for logic and comparison operations. Also, it is frequently used when setting styles for elements using JavaScript, such as widths, heights, or time durations for animations and transitions.

• Strings: They are used to represent and manipulate text. Front-end developers use strings to work with text data, create dynamic content, change and update text in the DOM, handle user input, and more.

2. Functions: Functions allow code to be called multiple times with different arguments. It helps in keeping your program to follow DRY principle (Don't Repeat Yourself), making the code easier to read, debug, and maintain.

• Functions are essential for structuring the code into reusable blocks.

• They are especially important in JavaScript, as they are the main way to control scope and build private and public APIs.

• Functions are also used extensively in DOM manipulation and event handling, serving as callback functions that are executed when an event occurs.

• Many built-in methods and third-party libraries also utilize functions.

3. Context, Scope and Closures: A critical piece of understanding any programming language is understanding the availability of variables and functions, how state is maintained, and how to access that state.

In conclusion, numbers, strings, and functions are foundational concepts that are extensively used when interacting with the DOM, handling events, manipulating data, or even making API calls. A good understanding of these is absolutely necessary for a front-end developer. Understanding 'this' context, closures, and function timing with setTimeout and setInterval will equip you with essential skills for advanced JavaScript programming.

Educational Materials

• Online course. Basic JavaScript
• Methods of primitives
• Numbers
• Strings
• Functions
• Function expressions
• Arrow functions, the basics
• JavaScript specials
• How to write comments
• Scope: Global and Local Scope, Nested Scope
• Hoisting
• Functions as Data
• This, Context
• Call/Apply/Bind
• Function as Constructor
• Closures
• Closures and Loops
• Chaining
• Decorator
• Scheduling: setTimeout and setInterval

Optional Materials

• video about Functions
• Several ways to create functions
• Good and bad comments
• Temporal Dead Zone (TDZ) Functions
• Arrow Functions vs Regular Functions
• Static and Dynamic Scope
• Deep Dive into Functions: MDN
• Understanding Closures: MDN
• All String Build-In methods: MDN
• All Number Build-In methods: MDN
• You Don't Know JS: Scope & Closures: GitHub
• Apply and challenge your new knowledge on interactive exercises via JS Challenger.
• A comprehensive overview of JavaScript fundamentals in one concise handbook.
• Presentation Slides: Scope, Functions