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Dan Geabunea

This course will teach you the ins and outs of JavaScript functions, which are essential for developing complex frontend or backend web applications in JavaScript.

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This course will teach you the ins and outs of JavaScript functions, which are essential for developing complex frontend or backend web applications in JavaScript.

Functions are a fundamental pillar of any programming language. Without functions, programs would not be able to do anything. In this course, Functions in JavaScript, you’ll learn to use functions effectively by leveraging all their capabilities in the right circumstances. First, you’ll explore how to define and invoke functions. Next, you’ll discover the various ways to pass parameters to a function. Then, you'll understand what methods, getters, and setters are, and how they can encapsulate behavior. Finally, you’ll learn to use functions asynchronously and deep dive into advanced concepts such as scope and closures. When you finish this course, you’ll have the skills and knowledge of functions needed to develop complex backend or frontend applications in JavaScript.

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What's inside

Syllabus

Course Overview
Defining Functions
Passing Data to Functions
Using Methods, Getters, and Setters
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Understanding Function Scope and Closure
Understanding “this”
Working with Asynchronous Functions

Good to know

Know what's good
, what to watch for
, and possible dealbreakers
Develops functions effectively and addresses circumstances
Explores multiple ways to pass parameters and data
Deep dives into advanced concepts such as scope and closure for mastery

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Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Functions in JavaScript with these activities:
Review JavaScript Function Syntax
Review the syntax of JavaScript functions to ensure a solid foundation for the course.
Browse courses on Functions
Show steps
  • Read the course syllabus and identify sections covering function syntax.
  • Review online tutorials or documentation on JavaScript functions.
  • Practice writing simple JavaScript functions.
Read 'JavaScript: The Good Parts'
Gain a deeper understanding of JavaScript fundamentals by reading a classic text on the language, providing a solid theoretical foundation.
Show steps
  • Read the book thoroughly, paying attention to sections covering functions.
  • Take notes and highlight key concepts.
  • Discuss the book's insights with peers or online communities.
Participate in a Function-Focused Study Group
Join a study group to engage in discussions, ask questions, and collaborate on understanding JavaScript functions.
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Show steps
  • Find or create a study group with peers taking the same course.
  • Meet regularly to discuss course material, focus on functions.
  • Work together to solve problems and clarify concepts.
  • Present findings or lead discussions on specific function-related topics.
Five other activities
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Practice Passing Parameters to Functions
Practice passing parameters to functions to reinforce the concept and improve understanding.
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Show steps
  • Find online coding exercises or platforms that provide practice drills for passing parameters.
  • Solve a series of drills, varying the number and types of parameters passed.
  • Analyze the results and identify any areas for improvement.
Attend a JavaScript Function Deep Dive Workshop
Attend a workshop led by an expert to gain hands-on experience with JavaScript functions and advanced concepts.
Browse courses on Functions
Show steps
  • Research and identify relevant workshops.
  • Register for a workshop that aligns with your learning needs.
  • Attend the workshop and actively participate in discussions and exercises.
  • Follow up with the workshop presenter or attendees for further learning.
Create a Visual Guide to Function Scope and Closure
Create a visual aid, such as a flowchart or diagram, to illustrate function scope and closure, enhancing understanding and retention.
Show steps
  • Research and understand the concepts of function scope and closure.
  • Choose a visual format that will effectively convey the concepts.
  • Create the visual guide, ensuring clarity and simplicity.
  • Share the visual guide with peers or online communities for feedback.
Build a JavaScript Calculator Using Functions
Create a practical project that requires the application of functions, such as a JavaScript calculator, to solidify skills and knowledge.
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Show steps
  • Design the calculator's functionality and user interface.
  • Implement the calculator's logic using JavaScript functions.
  • Test and debug the calculator thoroughly.
  • Document the calculator's code and functionality.
Contribute to an Open-Source JavaScript Function Library
Contribute to an open-source project to gain practical experience working with JavaScript functions and contribute to the community.
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Show steps
  • Identify an open-source JavaScript function library relevant to your interests.
  • Review the project's documentation and contribution guidelines.
  • Identify a specific issue or feature to work on.
  • Implement the feature or fix the issue, following the project's coding standards.
  • Submit a pull request and collaborate with the project maintainers.

Career center

Learners who complete Functions in JavaScript will develop knowledge and skills that may be useful to these careers:
Web Developer
Web Developers build and maintain websites and web applications. This course, Functions in JavaScript, will be extremely useful for Web Developers because JavaScript is the foundation for modern web development. Learning how to develop complex frontend applications will be instrumental in their success in this role.
Software Development Manager
Software Development Managers plan, coordinate, and oversee software development projects. This course will help Software Development Managers build more robust JavaScript frameworks and applications with complex functionality and will help them better manage JavaScript projects and teams.
Software Architect
Software Architects design and develop complex software systems, focusing on the overall structure and architecture of the software. This course will help Software Architects build more robust JavaScript frameworks and applications with complex functionality.
Computer Systems Analyst
Computer Systems Analysts study an organization's current business processes and procedures, and then design and implement computer systems to meet those needs. While this course is not directly related to the daily tasks of a Computer Systems Analyst, learning how to develop complex backend applications in JavaScript will be useful for this role.
Database Administrator
Database Administrators implement and maintain computer databases, ensuring their availability, efficiency, and security. While this course on Functions in Javascript may not be directly related to the daily tasks of a Database Administrator, learning to build complex backend applications in JavaScript will be useful for this role.
Information Security Analyst
Information Security Analysts plan and implement security measures to protect an organization's computer systems and networks. This course may be useful for Information Security Analysts as it will help them to better understand the security implications of the JavaScript applications and systems they manage.
Systems Analyst
Systems Analysts study an organization's current business processes and then design and implement computer systems to meet those needs. While this course focuses on JavaScript programming and does not cover systems analysis methodologies, learning to develop complex backend applications in JavaScript will be useful for this role.
Security Analyst
Security Analysts identify and mitigate security risks to an organization's computer systems and networks. While this course does not discuss cybersecurity frameworks or risk assessment strategies, understanding how to develop complex backend applications in JavaScript may be useful in managing security protocols and infrastructure.
Data Scientist
Data Scientists use scientific methods, processes, algorithms, and systems to extract knowledge and insights from data in various forms, both structured and unstructured. This course may be useful for Data Scientists who work with JavaScript-based tools and applications in their data analysis and modeling work.
Network Administrator
Network Administrators maintain and optimize computer networks. While this course does not discuss networking technologies and protocols and network troubleshooting, it may be useful for Network Administrators in data centers because learning how to develop complex backend applications in JavaScript will be useful for large scale IT infrastructure.
Computer Programmer
Programmers work with software and algorithms to build custom solutions for end-users and write the code that makes software and apps work. This course, Functions in JavaScript, may be useful for Computer Programmers in software engineering because JavaScript is used by many software programs. Learning the ins and outs of these functions will help them build complex software applications.
Quality Assurance Analyst
Quality Assurance Analysts test software to identify bugs and ensure they're fixed before the software is released to the public. This course will likely only be marginally useful to Quality Assurance Analysts, as understanding JavaScript functions is not a normal part of their job description.
Data Analyst
Data Analysts collect, analyze, interpret, and present data to help organizations make informed decisions. This course will likely only be marginally useful to Data Analysts, as data analysis does not typically involve extensive JavaScript programming.
Machine Learning Engineer
Machine Learning Engineers build, deploy, and maintain machine learning models to solve complex problems. This course will likely only be marginally useful to Machine Learning Engineers, as they do not typically need to know how to program in JavaScript.
User Experience (UX) Designer
User Experience Designers create the overall experience of a product or service for a user, focusing on usability, accessibility, and overall user satisfaction. This course will likely only be marginally useful to UX Designers, as they do not typically need to know how to program in JavaScript.

Reading list

We've selected 12 books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in Functions in JavaScript.
Provides a deep dive into the JavaScript language. It covers a wide range of topics, from the basics of the language to advanced concepts such as closures and the event loop. It great resource for experienced JavaScript developers who want to improve their understanding of the language.
Provides a comprehensive and accessible introduction to JavaScript. It covers a wide range of topics, from the basics of the language to advanced concepts such as closures and asynchronous programming. It great resource for both beginners and experienced JavaScript developers.
Provides a comprehensive and accessible introduction to JavaScript. It covers a wide range of topics, from the basics of the language to advanced concepts such as closures and asynchronous programming. It great resource for both beginners and experienced JavaScript developers.
Comprehensive reference for the JavaScript language. It covers a wide range of topics, from the basics of the language to advanced concepts such as the DOM and AJAX. It valuable resource for both beginners and experienced JavaScript developers who want to learn more about the language.
Provides a concise and insightful overview of the JavaScript language, focusing on its strengths and best practices. It is an excellent resource for understanding the core concepts of JavaScript and how to use them effectively.
Provides a concise and insightful overview of the JavaScript language, focusing on its strengths and best practices. It is an excellent resource for understanding the core concepts of JavaScript and how to use them effectively.
Provides a collection of reusable patterns for writing JavaScript code. These patterns can help you write more efficient, maintainable, and readable code. It valuable resource for experienced JavaScript developers who want to improve their coding skills.
Provides a collection of advanced JavaScript techniques. These techniques can help you write more efficient, maintainable, and reusable code. It valuable resource for experienced JavaScript developers who want to improve their coding skills.
Provides an introduction to functional programming in JavaScript. Functional programming style of programming that emphasizes the use of pure functions and immutable data. It can help you write more concise, reusable, and testable code. This book great resource for JavaScript developers who want to learn more about functional programming.
Provides a comprehensive introduction to Node.js. It covers a wide range of topics, from the basics of Node.js to advanced concepts such as clustering and performance optimization. It great resource for both beginners and experienced Node.js developers.
Provides an engaging and interactive introduction to JavaScript. It great resource for beginners who want to learn the basics of the language in a fun and easy-to-understand way.

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