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JavaScript Notes:Beginner's JavaScript Course: Fundamentals
Overview
JavaScript is a high-level, dynamic, and weakly typed web scripting language used for creating dynamic
and interactive web pages.
Key Features
• Dynamic: JavaScript code can change and react to user input and events.
• Weakly typed: JavaScript automatically converts data types as needed.
• Interpreted: JavaScript code is executed by a browser or a runtime environment without prior
compilation.
Usage
JavaScript is used for:
• Adding interactivity to web pages
• Creating web and mobile apps
• Building web servers
• Game development
• Automating repetitive jobs
Syntax
JavaScript syntax includes:
• Variables: let, const, var
• Data types: number, string, boolean, object, array, null, undefined
• Operators: +, -, *, /, %, ++, --, ==, ===, !=, !==, &&, ||
• Control structures: if, else, else if, switch, for, while, do-while
• Functions: regular functions, arrow functions
• Object-oriented programming: classes, objects, prototypes
,Popular Libraries and Frameworks
• jQuery
• React
• Angular
• Vue.js
• Node.js
Best Practices
• Keep code modular and organized
• Validate user input
• Use meaningful variable and function names
• Use comments to explain code
• Use version control systems like Git
• Test code thoroughly
• Use linters to enforce consistent syntax
Resources
• Mozilla Developer Network (MDN) JavaScript Guide
• Eloquent JavaScript
• JavaScript.info
• FreeCodeCamp JavaScript Algorithms and Data Structures Certification
• Node.js Documentation
Generate Multiple Choice QuizSearch The Web for similar content
Strings
• Manipulating, concatenating and understanding string properties
• toUpperCase()
,• toLowerCase()
• slice()
• substr()
• replace()
• indexOf()
• charAt()
• concat()
• trim()
• length
Array Iteration and Manipulation
• Iterating and manipulating arrays in JavaScript
• forEach()
• map()
• filter()
• reduce()
• every()
• some()
• push()
• pop()
• shift()
• unshift()
• splice()
Objects
• Updating objects and best practices
• dot notation
, • bracket notation
• spread operator
• Object.assign()
• Accessing and modifying objects
• accessing properties with dot and bracket notation
• deleting properties with delete
• Object.keys()
• Object.values()
• Object.entries()
Loops
• Nested loops with multidimensional arrays
• for loops
• nested for loops
• Iteration with while and for loops
• while
• do...while
• for
• for...in
• for...of
Modules
• Exporting and importing variables and functions
• export default
• export
• import
• import {...}
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