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Learn #"tight">

Learn how to create more secure applications by predicting, handling, and debugging errors with JavaScript.

4.59 out of 5 stars
This course includes
3,325 learners enrolled
This course includes

  • Skill level

    Beginner

  • Time to complete

    Average based on combined completion rates — individual pacing in lessons, projects, and quizzes may vary
     
    1 hour

  • Prerequisites

    None

About this course

Continue your JavaScript learning journey with Learn #"button">

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Syllabus

The platform

Hands-on learning

Animated GIF of an AI provided error explanation within Codecademy's learning environment
An AI-generated hint within the instructions of a Codecademy project
Animated GIF of Codecademy's Job Readiness Checker tool generating a compatibility report for a senior software engineer role
Animated GIF of building a phone screen interview using Codecademy's Interview Simulator
A fill-in-the-blank JavaScript question in a Codecademy assessment
Meet the creator of the course
Kenny Lin
Software Engineer at Codecademy
Kenny is the Domain Manager for the Web Development Domain at Codecademy. He contributed to a wide range of courses and paths at Codecademy, including JavaScript, Bootstrap, Handlebars, Phaser.js, Go, Swift, TypeScript, and Lua.

Earn a certificate of completion

Show your network you've done the work by earning a certificate of completion for each course or path you finish.
  • Show proofReceive a certificate that demonstrates you've completed a course or path.
  • Build a collectionThe more courses and paths you complete, the more certificates you collect.
  • Share with your networkEasily add certificates of completion to your LinkedIn profile to share your accomplishments.

Learn #"true">4.6
4.59 out of 5 stars
121 ratings
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  5. 1 star

  • The progress I have made since starting to use codecademy is immense! I can study for short periods or long periods at my own convenience - mostly late in the evenings.
    Chris
    Codecademy Learner@ USA
  • I felt like I learned months in a week. I love how Codecademy uses learning by practice and gives great challenges to help the learner to understand a new concept and subject.
    Rodrigo
    Codecademy Learner@ UK
  • Brilliant learning experience. Very interactive. Literally a game changer if you're learning on your own.
    John-Andrew
    Codecademy Learner@ USA

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Frequently asked questions about #"true" data-btn="true">

What is debugging?

Debugging means getting rid of computer bugs. A “bug” is a coding error that causes a program to malfunction. You’ll come across a lot of them throughout your coding journey – and career.

    • Join over 50 million learners and start Learn #"button" type="button">Start

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    • Practice Projects

      Guided projects that help you solidify the skills and concepts you're learning.

    • Assessments

      Auto-graded quizzes and immediate feedback help you reinforce your skills as you learn.

    • Certificate of Completion

      Earn a document to prove you've completed a course or path that you can share with your network.
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